Pub Date : 2026-03-01Epub Date: 2025-12-31DOI: 10.1016/j.conengprac.2025.106745
Ying Zhang , Haoran Qi , Jinchao Chen , Chenglie Du , Shuaishuai Ge , Yongquan Xie
Dual-motor coupled powertrain (DMCP) is a promising drive type that can improve the energy utilization efficiency and driving range of electric vehicles (EVs). In this paper, a heterogeneous synchronous reinforcement learning (HSRL) approach is proposed to optimize the energy utilization efficiency of the DMCP in EVs. First, the models of the DMCP and vehicle dynamics are established. Then, the HSRL framework is constructed to select the drive mode and determine the torque allocation coefficient of the DMCP simultaneously. Within the HSRL framework, an actor-critic network is adopted, and a cross-domain learning strategy is proposed. The cross-domain learning strategy incorporates discrete domain learning (DDL) and continuous domain learning (CDL) to learn both the discrete and continuous decision-making tasks concurrently. Additionally, gradient strategies for DDL and CDL are designed. Based on the proposed HSRL, the energy-aware drive mode and torque allocation coefficient of the DMCP are selected and determined. To demonstrate the superiority of the proposed method, two state-of-the-art (SOTA) methods are chosen as benchmarks. The simulation and experimental results show that the proposed method outperforms these benchmarks in optimizing the energy utilization efficiency of the EVs’ DMCP.
{"title":"Energy-aware optimization of electric vehicles’ dual-motor coupled powertrain based on heterogeneous synchronous reinforcement learning","authors":"Ying Zhang , Haoran Qi , Jinchao Chen , Chenglie Du , Shuaishuai Ge , Yongquan Xie","doi":"10.1016/j.conengprac.2025.106745","DOIUrl":"10.1016/j.conengprac.2025.106745","url":null,"abstract":"<div><div>Dual-motor coupled powertrain (DMCP) is a promising drive type that can improve the energy utilization efficiency and driving range of electric vehicles (EVs). In this paper, a heterogeneous synchronous reinforcement learning (HSRL) approach is proposed to optimize the energy utilization efficiency of the DMCP in EVs. First, the models of the DMCP and vehicle dynamics are established. Then, the HSRL framework is constructed to select the drive mode and determine the torque allocation coefficient of the DMCP simultaneously. Within the HSRL framework, an actor-critic network is adopted, and a cross-domain learning strategy is proposed. The cross-domain learning strategy incorporates discrete domain learning (DDL) and continuous domain learning (CDL) to learn both the discrete and continuous decision-making tasks concurrently. Additionally, gradient strategies for DDL and CDL are designed. Based on the proposed HSRL, the energy-aware drive mode and torque allocation coefficient of the DMCP are selected and determined. To demonstrate the superiority of the proposed method, two state-of-the-art (SOTA) methods are chosen as benchmarks. The simulation and experimental results show that the proposed method outperforms these benchmarks in optimizing the energy utilization efficiency of the EVs’ DMCP.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106745"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-01-02DOI: 10.1016/j.conengprac.2025.106738
Martin Stefan Baumann , Andreas Steinboeck , Andreas Kugi , Wolfgang Kemmetmüller
Accurate temperature monitoring is essential for the safe and efficient operation of permanent magnet synchronous machines (PMSMs), especially in automotive applications. However, due to cost and integration challenges, placing temperature sensors on critical components like permanent magnets is impractical. This paper proposes an observer-based approach that leverages available measurements to estimate temperatures throughout the machine without relying on full sensor coverage. Two observers are developed: one based on an electrical machine model, which estimates the permanent magnet temperature indirectly via the permanent magnet flux linkage, and another one based on a thermal model, which incorporates measured temperatures from the end winding and the estimate from the electrical observer. The approach combines data-driven calibration with physical modeling to achieve high estimation accuracy and robustness under varying cooling conditions. The proposed method is validated both experimentally and through dedicated simulation studies, that assess the observer’s robustness to model uncertainties, parameter variations, and measurement noise. The results demonstrate that fusing electrical and thermal observations enables more precise and responsive temperature estimation than using either model alone. The method provides a practical alternative to dense sensor placement while preserving reliability and safety.
{"title":"Temperature estimation in PMSMs via combined direct and indirect methods","authors":"Martin Stefan Baumann , Andreas Steinboeck , Andreas Kugi , Wolfgang Kemmetmüller","doi":"10.1016/j.conengprac.2025.106738","DOIUrl":"10.1016/j.conengprac.2025.106738","url":null,"abstract":"<div><div>Accurate temperature monitoring is essential for the safe and efficient operation of permanent magnet synchronous machines (PMSMs), especially in automotive applications. However, due to cost and integration challenges, placing temperature sensors on critical components like permanent magnets is impractical. This paper proposes an observer-based approach that leverages available measurements to estimate temperatures throughout the machine without relying on full sensor coverage. Two observers are developed: one based on an electrical machine model, which estimates the permanent magnet temperature indirectly via the permanent magnet flux linkage, and another one based on a thermal model, which incorporates measured temperatures from the end winding and the estimate from the electrical observer. The approach combines data-driven calibration with physical modeling to achieve high estimation accuracy and robustness under varying cooling conditions. The proposed method is validated both experimentally and through dedicated simulation studies, that assess the observer’s robustness to model uncertainties, parameter variations, and measurement noise. The results demonstrate that fusing electrical and thermal observations enables more precise and responsive temperature estimation than using either model alone. The method provides a practical alternative to dense sensor placement while preserving reliability and safety.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106738"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2026-01-02DOI: 10.1016/j.conengprac.2025.106742
Pablo Otálora , Sarasij Banerjee , Mohamed El Mistiri , Owais Khan , Daniel E. Rivera , José Luis Guzmán
Microalgae have gained increasing recognition as a sustainable resource with diverse applications ranging from biofuel production to wastewater treatment. Raceway reactors, the most widespread microalgae production system, are vulnerable to environmental fluctuations and external contamination, which can negatively impact microalgal growth and increase the emphasis on culture conditions, especially pH. In this study, a three-degree-of-freedom model predictive controller is presented, which is designed to regulate pH in raceway reactors. The controller employs a Model-on-Demand (MoD) approach for real-time data-driven estimation by using a database generated by exciting the system with control-relevant multisine signals. The estimated models demonstrate accurate goodness of fit across a wide range of prediction horizons, outperforming similar linear models. The controller formulation offers significant flexibility, enabling users to independently tune the speeds of setpoint tracking, measured disturbance rejection, and unmeasured disturbance rejection. The experimental results achieved in a pilot facility demonstrate that the proposed methodology is intuitive, straightforward and highly effective in controlling microalgae production systems.
{"title":"Enhancing pH control in microalgae raceway photobioreactors using 3DoF-KF model-on-demand model predictive control","authors":"Pablo Otálora , Sarasij Banerjee , Mohamed El Mistiri , Owais Khan , Daniel E. Rivera , José Luis Guzmán","doi":"10.1016/j.conengprac.2025.106742","DOIUrl":"10.1016/j.conengprac.2025.106742","url":null,"abstract":"<div><div>Microalgae have gained increasing recognition as a sustainable resource with diverse applications ranging from biofuel production to wastewater treatment. Raceway reactors, the most widespread microalgae production system, are vulnerable to environmental fluctuations and external contamination, which can negatively impact microalgal growth and increase the emphasis on culture conditions, especially pH. In this study, a three-degree-of-freedom model predictive controller is presented, which is designed to regulate pH in raceway reactors. The controller employs a Model-on-Demand (MoD) approach for real-time data-driven estimation by using a database generated by exciting the system with control-relevant multisine signals. The estimated models demonstrate accurate goodness of fit across a wide range of prediction horizons, outperforming similar linear models. The controller formulation offers significant flexibility, enabling users to independently tune the speeds of setpoint tracking, measured disturbance rejection, and unmeasured disturbance rejection. The experimental results achieved in a pilot facility demonstrate that the proposed methodology is intuitive, straightforward and highly effective in controlling microalgae production systems.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106742"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2025-11-29DOI: 10.1016/j.conengprac.2025.106669
Josep Caballé , Pablo Segovia , Carlos Ocampo-Martinez , Nicanor Quijano
The rapid proliferation of electric vehicles (EVs) presents significant challenges to power-grid stability, especially when thousands of cars charge simultaneously without coordination. This paper investigates two complementary families of scalable control schemes-(i) Mean-Field Control (Mean-Field Games and Mean-Field-Type Games), and (ii) model-free Reinforcement Learning (classical Reinforcement Learning and Deep Reinforcement Learning)-that capture stochastic arrivals, nodal capacity limits, ambient-temperature effects and battery degradation. Analytical mean-field-based formulations yield decentralized charging policies that depend only on population statistics and enjoy ϵ-Nash optimality as fleet size grows, while reinforcement-learning-based agents learn directly from interaction histories and cope naturally with partial observability and non-stationary price signals. A common set of nine key performance indicators is applied to two benchmark scenarios: a one-night, three-node grid and a seven-day, heterogeneous 1 000-EV testbed built on real distribution-network data. Results show that Mean-Field-Type Games minimizes unmet energy ( ≥ 1 %) and queueing delays, Deep Reinforcement Learning maximizes average final State-of-Charge ( ≈ 81 %) under volatile tariffs, and classical Reinforcement Learning provides the most interpretable albeit least efficient baseline. These quantified trade-offs clarify when model-based equilibrium methods suffice and when adaptive, data-driven controllers become indispensable, providing actionable guidance for large-scale, battery-health-aware EV-charging deployments.
{"title":"Large-scale EV charging coordination: a detailed exploration of mean-field and reinforcement learning approaches","authors":"Josep Caballé , Pablo Segovia , Carlos Ocampo-Martinez , Nicanor Quijano","doi":"10.1016/j.conengprac.2025.106669","DOIUrl":"10.1016/j.conengprac.2025.106669","url":null,"abstract":"<div><div>The rapid proliferation of electric vehicles (EVs) presents significant challenges to power-grid stability, especially when thousands of cars charge simultaneously without coordination. This paper investigates two complementary families of scalable control schemes-(i) Mean-Field Control (Mean-Field Games and Mean-Field-Type Games), and (ii) model-free Reinforcement Learning (classical Reinforcement Learning and Deep Reinforcement Learning)-that capture stochastic arrivals, nodal capacity limits, ambient-temperature effects and battery degradation. Analytical mean-field-based formulations yield decentralized charging policies that depend only on population statistics and enjoy ϵ-Nash optimality as fleet size grows, while reinforcement-learning-based agents learn directly from interaction histories and cope naturally with partial observability and non-stationary price signals. A common set of nine key performance indicators is applied to two benchmark scenarios: a one-night, three-node grid and a seven-day, heterogeneous 1 000-EV testbed built on real distribution-network data. Results show that <em>Mean-Field-Type Games</em> minimizes unmet energy ( ≥ 1 %) and queueing delays, <em>Deep Reinforcement Learning</em> maximizes average final <em>State-of-Charge</em> ( ≈ 81 %) under volatile tariffs, and <em>classical Reinforcement Learning</em> provides the most interpretable albeit least efficient baseline. These quantified trade-offs clarify when model-based equilibrium methods suffice and when adaptive, data-driven controllers become indispensable, providing actionable guidance for large-scale, battery-health-aware EV-charging deployments.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106669"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145625058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Permanent magnet synchronous motors (PMSMs) have been widely used for many applications. The current controller in voltage source inverters (VSIs) has to achieve a fast current response with zero steady-state errors in the wide operating range of the PMSM. In particular, it is challenging for the VSI to control the current precisely when the PMSM operates in the over-modulation region, including the six-step operation. In this region, the modulation index exceeds the linear range of pulse-width modulation, and during the six-step operation, the inverter output voltage becomes approximately a square wave. This article proposes a novel rule-based approach for VSIs driving the PMSM to achieve a fast and accurate current response in both the transient and steady states in the entire region from linear to six-step operations. The advantage of the proposed method is verified by a comparative analysis with the conventional finite-control-set model predictive control and continuous-control-set model predictive control through simulations and experiments. Consequently,the proposed method reduces the offset by approximately 23–36% in the over-modulation region and by approximately 41–50% during the six-step operation, compared with conventional methods, while maintaining a fast current (torque) response.
{"title":"Rule-based approach incorporating MPC, integral-type LQR, and six-step operation for current control in PMSM","authors":"Kenta Koiwa , Tomoya Takahashi , Tadanao Zanma , Kang-Zhi Liu","doi":"10.1016/j.conengprac.2025.106694","DOIUrl":"10.1016/j.conengprac.2025.106694","url":null,"abstract":"<div><div>Permanent magnet synchronous motors (PMSMs) have been widely used for many applications. The current controller in voltage source inverters (VSIs) has to achieve a fast current response with zero steady-state errors in the wide operating range of the PMSM. In particular, it is challenging for the VSI to control the current precisely when the PMSM operates in the over-modulation region, including the six-step operation. In this region, the modulation index exceeds the linear range of pulse-width modulation, and during the six-step operation, the inverter output voltage becomes approximately a square wave. This article proposes a novel rule-based approach for VSIs driving the PMSM to achieve a fast and accurate current response in both the transient and steady states in the entire region from linear to six-step operations. The advantage of the proposed method is verified by a comparative analysis with the conventional finite-control-set model predictive control and continuous-control-set model predictive control through simulations and experiments. Consequently,the proposed method reduces the offset by approximately 23–36% in the over-modulation region and by approximately 41–50% during the six-step operation, compared with conventional methods, while maintaining a fast current (torque) response.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106694"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2025-12-19DOI: 10.1016/j.conengprac.2025.106718
Xiaoliang Zhang , Tianqi Guo , Chaofu Bai , Jiamei Nie
Improving ride comfort in multi-stage leaf spring suspensions is critical for vehicle safety, driver health, and overall driving performance, yet a major challenge remains the abrupt changes in natural frequency due to sudden stiffness variations, which severely degrade ride quality. To address this challenge, this study employs the harmonic superposition method to extend the applicability of the memory element ω2 criterion from simple harmonic vibrations to random vibrations, consequently proposing an extended ω2 criterion. To this end, a skyhook inertance constant-frequency control rule is proposed, using the extended ω2 criterion as the judgment basis to mitigate the abrupt natural frequency changes caused by two-stage stiffness leaf springs with memory characteristics. Furthermore, based on a semi-active device combining an adjustable inerter and damper, the skyhook inertance semi-active constant-frequency control(SH-IFC) strategy for two-stage stiffness leaf spring suspension systems is developed. By utilizing the simulated-mass property of the grounded inerter to add virtual mass to the sprung mass during abrupt stiffness variation, this strategy maintains the natural frequency of the suspension system and mitigates the impact of its natural frequency on suspension performance. Experimental validation conducted on hardware-in-the-loop (HiL) systems and a D2P platform confirmed the control strategy’s effectiveness, achieving RMS body acceleration reductions of 13.86 % (1/4 load), 18.57 % (1/2 load), and 15.32 % (3/4 load) compared to passive suspensions. These results indicate that the proposed strategy effectively stabilizes the natural frequency and mitigates ride comfort degradation caused by its abrupt variations.
{"title":"Constant-frequency control strategy and semi-active implementation of a two-stage leaf spring suspension","authors":"Xiaoliang Zhang , Tianqi Guo , Chaofu Bai , Jiamei Nie","doi":"10.1016/j.conengprac.2025.106718","DOIUrl":"10.1016/j.conengprac.2025.106718","url":null,"abstract":"<div><div>Improving ride comfort in multi-stage leaf spring suspensions is critical for vehicle safety, driver health, and overall driving performance, yet a major challenge remains the abrupt changes in natural frequency due to sudden stiffness variations, which severely degrade ride quality. To address this challenge, this study employs the harmonic superposition method to extend the applicability of the memory element <em>ω</em><sup>2</sup> criterion from simple harmonic vibrations to random vibrations, consequently proposing an extended <em>ω</em><sup>2</sup> criterion. To this end, a skyhook inertance constant-frequency control rule is proposed, using the extended <em>ω</em><sup>2</sup> criterion as the judgment basis to mitigate the abrupt natural frequency changes caused by two-stage stiffness leaf springs with memory characteristics. Furthermore, based on a semi-active device combining an adjustable inerter and damper, the skyhook inertance semi-active constant-frequency control(SH-IFC) strategy for two-stage stiffness leaf spring suspension systems is developed. By utilizing the simulated-mass property of the grounded inerter to add virtual mass to the sprung mass during abrupt stiffness variation, this strategy maintains the natural frequency of the suspension system and mitigates the impact of its natural frequency on suspension performance. Experimental validation conducted on hardware-in-the-loop (HiL) systems and a D2P platform confirmed the control strategy’s effectiveness, achieving RMS body acceleration reductions of 13.86 % (1/4 load), 18.57 % (1/2 load), and 15.32 % (3/4 load) compared to passive suspensions. These results indicate that the proposed strategy effectively stabilizes the natural frequency and mitigates ride comfort degradation caused by its abrupt variations.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106718"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2025-12-18DOI: 10.1016/j.conengprac.2025.106711
Nikolaus Würkner , Lukas Tarra , Andreas Deutschmann-Olek , Andreas Kugi
Regenerative amplifiers (RAs) are a common tool to generate high-intensity laser pulses by circulating them through an optical gain medium inside a cavity until the stored energy is depleted. This paper presents a control strategy that simultaneously suppresses dynamical instabilities while generating output pulses with a desired pulse shape. To enable model-based design, we derive a reduced nonlinear discrete-time model of the amplifier by combining spectral small-gain approximation with spatially averaged population dynamics in the gain medium. The resulting model captures both the dynamical and spectral behavior of the amplifier. Stabilization of a desired operating point is achieved through a linear–quadratic regulator (LQR) combined with an Extended Kalman Filter (EKF) for state estimation based on output energy measurements. This subordinate feedback scheme suppresses bifurcations and mitigates excitations induced by changes in the spectral pulse shape. On top of this control loop, we apply model-based iterative learning control (ILC) to asymptotically track desired output spectra. Projected ILC laws are used to adapt both the input filter and the provided pump-light intensity. The proposed method is validated in simulation on a distributed-parameter model calibrated to measurements of a Ho:YAG-based RA. Results demonstrate robust convergence to desired pulse shapes and highlights its feasibility for real-time implementation.
{"title":"Combined feedback stabilization and iterative pulse shaping for regenerative optical amplifiers","authors":"Nikolaus Würkner , Lukas Tarra , Andreas Deutschmann-Olek , Andreas Kugi","doi":"10.1016/j.conengprac.2025.106711","DOIUrl":"10.1016/j.conengprac.2025.106711","url":null,"abstract":"<div><div>Regenerative amplifiers (RAs) are a common tool to generate high-intensity laser pulses by circulating them through an optical gain medium inside a cavity until the stored energy is depleted. This paper presents a control strategy that simultaneously suppresses dynamical instabilities while generating output pulses with a desired pulse shape. To enable model-based design, we derive a reduced nonlinear discrete-time model of the amplifier by combining spectral small-gain approximation with spatially averaged population dynamics in the gain medium. The resulting model captures both the dynamical and spectral behavior of the amplifier. Stabilization of a desired operating point is achieved through a linear–quadratic regulator (LQR) combined with an Extended Kalman Filter (EKF) for state estimation based on output energy measurements. This subordinate feedback scheme suppresses bifurcations and mitigates excitations induced by changes in the spectral pulse shape. On top of this control loop, we apply model-based iterative learning control (ILC) to asymptotically track desired output spectra. Projected ILC laws are used to adapt both the input filter and the provided pump-light intensity. The proposed method is validated in simulation on a distributed-parameter model calibrated to measurements of a Ho:YAG-based RA. Results demonstrate robust convergence to desired pulse shapes and highlights its feasibility for real-time implementation.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106711"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2025-12-18DOI: 10.1016/j.conengprac.2025.106713
Yuanqing Xia, Min Gong, Dailiang Ma, Ganghui Shen
In this paper, a saturated output feedback trajectory tracking scheme for a quadrotor is developed by using the fixed-time observer (FxTO) technique. The translational controller is examined based on a saturated nonlinear control law, where the unmeasurable velocity states are estimated by the FxTO. The proposed FxTO theoretically guarantees the convergence of the estimation errors in a fixed time, and the stability of the closed-loop system is proved. Next, a cascaded attitude controller is explored, and a feedforward compensation is introduced via the differential flatness approach. Additionally, a fixed-time disturbance observer (FxTDO) is incorporated to improve robustness against disturbances. Finally, the tracking accuracy and robustness of the proposed method are verified through simulations and experiments.
{"title":"Saturated output feedback control for quadrotor trajectory tracking via fixed-time observers","authors":"Yuanqing Xia, Min Gong, Dailiang Ma, Ganghui Shen","doi":"10.1016/j.conengprac.2025.106713","DOIUrl":"10.1016/j.conengprac.2025.106713","url":null,"abstract":"<div><div>In this paper, a saturated output feedback trajectory tracking scheme for a quadrotor is developed by using the fixed-time observer (FxTO) technique. The translational controller is examined based on a saturated nonlinear control law, where the unmeasurable velocity states are estimated by the FxTO. The proposed FxTO theoretically guarantees the convergence of the estimation errors in a fixed time, and the stability of the closed-loop system is proved. Next, a cascaded attitude controller is explored, and a feedforward compensation is introduced via the differential flatness approach. Additionally, a fixed-time disturbance observer (FxTDO) is incorporated to improve robustness against disturbances. Finally, the tracking accuracy and robustness of the proposed method are verified through simulations and experiments.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106713"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an integrated system for autonomous lane following with obstacle avoidance in unmanned tracked vehicles (UTVs), combining monocular vision and Active Disturbance Rejection Control (ADRC). A vision-based guidance system is developed using deep learning models: YOLOPv2 for lane segmentation and YOLOv8 for obstacle detection within a dynamic region of interest. Novel lane processing algorithms address partial detections and generate aligned lane boundaries, while a computationally efficient virtual lane generation mechanism enables path planning around obstacles without requiring dedicated depth sensors. To follow the path defined by this guidance system, an ADRC controller is designed for the UTV’s lateral control channel based on a kinematic model, incorporating disturbance estimation via an extended state observer, ensuring robust regulation of lateral path error. The system’s effectiveness is demonstrated through comprehensive experimental validation on a physical UTV platform in two distinct environments: an indoor track with static obstacles and an outdoor setting with both static and dynamic obstacles. Outdoor trials confirm the system’s robustness against real-world challenges, including sloped terrain, varying natural lighting, and multi-colored lane markings. Furthermore, the system successfully navigated around obstacles and critically validated its fail-safe stop logic when the path was fully blocked. Comparative tests against a conventional PID controller quantitatively demonstrate the ADRC’s superior tracking accuracy and disturbance rejection capabilities, highlighting its enhanced robustness in both controlled indoor and unstructured outdoor environments. These results confirm the feasibility of achieving robust lane following and effective obstacle avoidance in UTVs using cost-efficient monocular vision. Supplementary material: https://youtu.be/9aKGugeYmfw?si=qiBCTzi7hYUvwUW6
{"title":"Lane following with obstacle avoidance for unmanned tracked vehicles using monocular vision and active disturbance rejection control","authors":"Salem-Bilal Amokrane , Momir Stanković , Rafal Madonski , Benyahia Ahmed Taki-Eddine","doi":"10.1016/j.conengprac.2025.106723","DOIUrl":"10.1016/j.conengprac.2025.106723","url":null,"abstract":"<div><div>This paper presents an integrated system for autonomous lane following with obstacle avoidance in unmanned tracked vehicles (UTVs), combining monocular vision and Active Disturbance Rejection Control (ADRC). A vision-based guidance system is developed using deep learning models: YOLOPv2 for lane segmentation and YOLOv8 for obstacle detection within a dynamic region of interest. Novel lane processing algorithms address partial detections and generate aligned lane boundaries, while a computationally efficient virtual lane generation mechanism enables path planning around obstacles without requiring dedicated depth sensors. To follow the path defined by this guidance system, an ADRC controller is designed for the UTV’s lateral control channel based on a kinematic model, incorporating disturbance estimation via an extended state observer, ensuring robust regulation of lateral path error. The system’s effectiveness is demonstrated through comprehensive experimental validation on a physical UTV platform in two distinct environments: an indoor track with static obstacles and an outdoor setting with both static and dynamic obstacles. Outdoor trials confirm the system’s robustness against real-world challenges, including sloped terrain, varying natural lighting, and multi-colored lane markings. Furthermore, the system successfully navigated around obstacles and critically validated its fail-safe stop logic when the path was fully blocked. Comparative tests against a conventional PID controller quantitatively demonstrate the ADRC’s superior tracking accuracy and disturbance rejection capabilities, highlighting its enhanced robustness in both controlled indoor and unstructured outdoor environments. These results confirm the feasibility of achieving robust lane following and effective obstacle avoidance in UTVs using cost-efficient monocular vision. <em>Supplementary material</em>: <span><span>https://youtu.be/9aKGugeYmfw?si=qiBCTzi7hYUvwUW6</span><svg><path></path></svg></span></div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106723"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-01Epub Date: 2025-12-30DOI: 10.1016/j.conengprac.2025.106705
Daniel Igbokwe , Malek Ghanes , Marc Bodson , Mohamed Hamida , Amir Messali
This paper introduces a novel discrete sliding-mode control (DSM) strategy for multiphase synchronous machines, supported by an adaptive discrete hybrid filtering differentiator (DHFD). The proposed reaching law significantly enhances transient performance while reducing computational complexity, enabling real-time implementation on low-cost processors. Focusing on five-phase wound-rotor synchronous machines (WRSMs)—a rarely studied configuration in existing literature—the method demonstrates remarkable efficacy in handling transient dynamics and parameter uncertainties. Notably, the control scheme is directly applicable to permanent magnet synchronous machines (PMSMs) and extensible to *n*-phase systems beyond five phases. Experimental hardware-in-the-loop (HIL) and simulation results validate the performance of the approach, showcasing rapid convergence, chattering suppression, and robustness under dynamic loads. By bridging the gap between advanced discrete-time sliding-mode theory and practical implementation for multiphase machines, this work offers a versatile solution for high-performance motor drives in aerospace, automotive, and industrial applications.
{"title":"A novel discrete sliding mode control based adaptive differentiator for five phase synchronous machines","authors":"Daniel Igbokwe , Malek Ghanes , Marc Bodson , Mohamed Hamida , Amir Messali","doi":"10.1016/j.conengprac.2025.106705","DOIUrl":"10.1016/j.conengprac.2025.106705","url":null,"abstract":"<div><div>This paper introduces a novel discrete sliding-mode control (DSM) strategy for multiphase synchronous machines, supported by an adaptive discrete hybrid filtering differentiator (DHFD). The proposed reaching law significantly enhances transient performance while reducing computational complexity, enabling real-time implementation on low-cost processors. Focusing on five-phase wound-rotor synchronous machines (WRSMs)—a rarely studied configuration in existing literature—the method demonstrates remarkable efficacy in handling transient dynamics and parameter uncertainties. Notably, the control scheme is directly applicable to permanent magnet synchronous machines (PMSMs) and extensible to *n*-phase systems beyond five phases. Experimental hardware-in-the-loop (HIL) and simulation results validate the performance of the approach, showcasing rapid convergence, chattering suppression, and robustness under dynamic loads. By bridging the gap between advanced discrete-time sliding-mode theory and practical implementation for multiphase machines, this work offers a versatile solution for high-performance motor drives in aerospace, automotive, and industrial applications.</div></div>","PeriodicalId":50615,"journal":{"name":"Control Engineering Practice","volume":"168 ","pages":"Article 106705"},"PeriodicalIF":4.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}