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Model-free predictive current control based on improved sliding mode disturbance observer 基于改进型滑模干扰观测器的无模型预测电流控制
Pub Date : 2024-03-16 DOI: 10.1177/01423312241233315
Qingkun Wei, Cao Tan, Mingji Hao, Xuewei Chen, Yingrui Li, Wenqing Ge
The motor parameters of permanent magnet synchronous motor (PMSM) can be mismatched in operation due to temperature variations and magnetic saturation. The parameter mismatch leads to a significant decrease in the robustness of traditional deadbeat predictive current control (DPCC), which leads to issues such as current static error and motor vibration noise. In this paper, a model-free predictive current control (MFPCC) method based on an improved sliding mode disturbance observer (SMDO) was proposed. The method estimated the total disturbance of the system using the improved SMDO, which could effectively suppress sliding mode chattering and accelerate the convergence speed of current errors. Subsequently, the predicted control voltage was calculated using a hyper-local model and compensated for the time delay. The experimental results demonstrated that the improved MFPCC-SMDO method generated lower motor noise compared to the traditional DPCC method when the controller’s inductance parameters are mismatched.
由于温度变化和磁饱和,永磁同步电机(PMSM)的电机参数在运行过程中可能会失配。参数失配导致传统死区预测电流控制(DPCC)的鲁棒性显著下降,从而引发电流静态误差和电机振动噪声等问题。本文提出了一种基于改进的滑模扰动观测器(SMDO)的无模型预测电流控制(MFPCC)方法。该方法利用改进的 SMDO 估算系统的总扰动,可有效抑制滑模颤振,加快电流误差的收敛速度。随后,利用超局部模型计算出预测的控制电压,并对时间延迟进行补偿。实验结果表明,与传统的 DPCC 方法相比,当控制器的电感参数不匹配时,改进的 MFPCC-SMDO 方法产生的电机噪声更低。
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引用次数: 0
Observer-based fault-tolerant fixed-time attitude tracking control for rigid spacecraft without angular velocity measurement 基于观测器的无角速度测量刚性航天器容错固定时间姿态跟踪控制
Pub Date : 2024-03-15 DOI: 10.1177/01423312241236135
Yin Zheng, He Zhang, Yan Wang
This paper investigates the problem of adaptive nonsingular fast terminal sliding mode fixed-time tracking control method for rigid spacecraft without angular velocity measurement. First, a novel fixed-time extended state observer is proposed to obtain accurate estimates of both unmeasurable angular velocities and integrated disturbance. Then, based on this sufficient qualification, an adaptive fast nonsingular terminal sliding mode controller is designed to make the state of the following spacecraft track a target spacecraft even when the tracking system has an actuator fault. Adaptive technology is introduced to compensate for the effect of observation error on the controller. Using the Lyapunov function and fixed-time property, it is proved that the control scheme can ensure that the attitude tracking error converges to the neighborhood of the origin in a fixed time and is independent of the initial conditions. Finally, numerical simulation examples are carried out to evaluate the effectiveness of the proposed fixed-time method.
本文研究了无角速度测量的刚性航天器的自适应非奇异快速终端滑模固定时间跟踪控制方法问题。首先,提出了一种新颖的固定时间扩展状态观测器,以获得对不可测角速度和综合扰动的精确估计。然后,在这一充分估计的基础上,设计了一种自适应快速非ingular终端滑动模式控制器,即使跟踪系统出现致动器故障,也能使跟随航天器的状态跟踪目标航天器。为了补偿观测误差对控制器的影响,引入了自适应技术。利用 Lyapunov 函数和固定时间特性,证明该控制方案能确保姿态跟踪误差在固定时间内收敛到原点附近,且与初始条件无关。最后,通过数值模拟实例来评估所提出的固定时间方法的有效性。
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引用次数: 0
Distributed optimization game algorithm to improve energy efficiency for multi-radio multi-channel wireless sensor network 提高多无线电多信道无线传感器网络能效的分布式优化博弈算法
Pub Date : 2024-03-15 DOI: 10.1177/01423312241228802
Ning Yao, Bai Chen, Jiaojiao Wang, Liyuan Wang, Xiaochen Hao
To send and receive data simultaneously, reduce network interference, and effectively improve energy efficiency, this paper analyzes the network characteristics of Multi-Radio Multi-Channel Wireless Sensor Network and optimizes the power and channel of each radio frequency interface. Based on the novel energy efficiency model and energy consumption efficiency model, this paper establishes a distributed optimization game model using Game Theory to maximize network energy efficiency, minimize energy consumption, and ensure network connectivity. Based on the game model, an efficient distributed resource allocation game algorithm is designed, in which a joint power control and channel allocation can quickly converge to Nash Equilibrium with low complexity. At the same time, the simulation results show that the distributed resource allocation game algorithm can effectively improve the energy efficiency, reduce network interference and bit error rate to ensure the successful data transmission.
为了同时发送和接收数据、减少网络干扰并有效提高能效,本文分析了多射频多信道无线传感器网络的网络特性,并优化了每个射频接口的功率和信道。基于新颖的能效模型和能耗效率模型,本文利用博弈论建立了分布式优化博弈模型,以实现网络能效最大化、能耗最小化并确保网络连通性。基于博弈模型,设计了一种高效的分布式资源分配博弈算法,其中功率控制和信道分配联合算法能以较低的复杂度快速收敛到纳什均衡。同时,仿真结果表明,分布式资源分配博弈算法能有效提高能效,降低网络干扰和误码率,确保数据传输成功。
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引用次数: 0
Observer-based positive edge consensus of multi-agent systems with directed graphs 基于观察者的有向图多代理系统正边共识
Pub Date : 2024-03-15 DOI: 10.1177/01423312241233314
Pengyu Zhang, Wei Zhang, Liduo Hu, Zhibin Hu
This paper concentrates on the positive edge consensus in directed networks with spanning trees using output feedback protocols. First, a novel positive system observer is established, which introduces a parameter to enhance the design freedom of the observer. Furthermore, sufficient conditions are proposed, which are based solely on the network’s edge count. Specifically, improved consensus and non-negative conditions are obtained by optimizing the constraints on the eigenvalue information. Subsequently, based on positive edge-consensus design conditions, a programming algorithm is developed. Finally, the effectiveness of the proposed control protocol is verified utilizing numerical simulations.
本文主要研究有向网络中使用输出反馈协议的生成树正边共识。首先,本文建立了一个新颖的正系统观测器,引入了一个参数来提高观测器的设计自由度。此外,本文还提出了仅基于网络边数的充分条件。具体来说,通过优化特征值信息的约束条件,获得了改进的共识和非负条件。随后,基于正边缘共识设计条件,开发了一种编程算法。最后,利用数值模拟验证了所提控制协议的有效性。
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引用次数: 0
Learning-based modeling and control design for a coaxial helicopter with aerodynamic coupling 具有空气动力耦合的同轴直升机基于学习的建模和控制设计
Pub Date : 2024-03-15 DOI: 10.1177/01423312241231066
Zhi Chen, Ke Gao, Hui Wang, Ling Wang, Jian Fu, Chen Peng
In this paper, a mathematical model of a coaxial helicopter with a new configuration is successfully constructed using the learning-based method. This nonlinear model can reflect the aerodynamic coupling characteristics between the two rotors of the coaxial helicopter. Compared with the traditional polynomial fitting method, this method significantly improves the integrity and robustness of the mathematical model. After multiple tune of the aircraft, we successfully completed the stable flight experiment using the designed attitude controller. By analyzing the real-time flight log, we verify the high accuracy of the coupled model trained on neural networks. The results of this research have brought important enlightenment to the field of aircraft design and control and proved the great potential of neural network in improving the accuracy of aircraft model and control efficiency.
本文采用基于学习的方法,成功地构建了一种新构型同轴直升机的数学模型。该非线性模型能够反映同轴直升机两旋翼之间的气动耦合特性。与传统的多项式拟合方法相比,该方法显著提高了数学模型的完整性和鲁棒性。经过对飞行器的多次调试,我们利用设计的姿态控制仪成功完成了稳定飞行实验。通过分析实时飞行日志,我们验证了神经网络训练的耦合模型的高准确性。该研究成果为飞机设计与控制领域带来了重要启示,证明了神经网络在提高飞机模型精度和控制效率方面的巨大潜力。
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引用次数: 0
Adaptive event-triggered control for neural network–approximated switched systems under injection attacks 注入攻击下神经网络近似交换系统的自适应事件触发控制
Pub Date : 2024-03-15 DOI: 10.1177/01423312241235985
Yiwen Qi, Ming Ji, Yiwen Tang, Honglin Geng, Ziyu Qu, Shitong Guo
This paper studies the event-triggered control for uncertain switched systems under injection attacks. An adaptive event-triggered control method for neural network–approximated switched systems (NNA-SSs) is proposed. The main works are as follows: First, a neural network is introduced to approximate the uncertain nonlinear item of the systems. Second, the observer-based adaptive event-triggering (OB-AET) strategy is designed to efficiently utilize communication and computing resources. Furthermore, the closed-loop switched systems considering injection attacks are established. By utilizing the Lyapunov function method and average dwell time technique, sufficient conditions for the exponential stability of the closed-loop switched systems are given. Accordingly, the gains of the state feedback controllers and observers are solved. Finally, simulation examples are given to verify the effectiveness of the proposed method.
本文研究了注入攻击下不确定开关系统的事件触发控制。提出了一种神经网络近似开关系统(NNA-SS)的自适应事件触发控制方法。主要工作如下:首先,引入神经网络来近似系统的不确定非线性项。其次,设计了基于观测器的自适应事件触发(OB-AET)策略,以有效利用通信和计算资源。此外,还建立了考虑注入攻击的闭环交换系统。通过利用 Lyapunov 函数方法和平均停留时间技术,给出了闭环切换系统指数稳定性的充分条件。相应地,解决了状态反馈控制器和观测器的增益问题。最后,给出了仿真实例来验证所提方法的有效性。
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引用次数: 0
Trajectory tracking control of wheeled mobile robots with skidding and time-varying delay 带滑行和时变延迟的轮式移动机器人的轨迹跟踪控制
Pub Date : 2024-03-15 DOI: 10.1177/01423312241236134
Mengqi Wang, Hua Chen, Yun Chen, Yuhan Cao, Linyuan Hou
This paper tackles the problem of trajectory tracking for wheeled mobile robots subject to time-varying input delay and bounded external disturbances. First, we establish a dynamic model for a wheeled mobile robot under sliding and skidding conditions, and determine the maximum allowable input delay that maintains system stability using Razumikhin-type stability analysis without prior knowledge of the variation in delay. The proposed adaptive robust controller combined with super-twisting sliding mode control is resilient to disturbances such as input delay, system uncertainty, and parameter variation. The proposed adaptive law enables real-time modification of switching gain based on tracking error without predefined knowledge of uncertainty bounds. Compared with traditional sliding mode control strategies, the super-twisting algorithm can eliminate chattering phenomenon while combined robust methods further reduce modeling uncertainties’ influence on system performance. Finally, we select an appropriate Lyapunov function to analyze and prove uniformly ultimately bounded of the closed-loop system. MATLAB simulation comparison results demonstrate that this approach achieves high tracking accuracy, faster response speed, and robustness.
本文探讨了受时变输入延迟和有界外部干扰影响的轮式移动机器人的轨迹跟踪问题。首先,我们建立了滑动和打滑条件下轮式移动机器人的动态模型,并在不预先知道延迟变化的情况下,利用拉祖米欣式稳定性分析确定了保持系统稳定性的最大允许输入延迟。所提出的自适应鲁棒控制器与超扭曲滑模控制相结合,能够抵御输入延迟、系统不确定性和参数变化等干扰。所提出的自适应法则可根据跟踪误差实时修改开关增益,而无需预先确定不确定性边界。与传统的滑模控制策略相比,超扭曲算法可以消除颤振现象,而组合鲁棒方法则进一步降低了建模不确定性对系统性能的影响。最后,我们选择了合适的 Lyapunov 函数来分析和证明闭环系统的均匀最终约束。MATLAB 仿真对比结果表明,该方法实现了较高的跟踪精度、较快的响应速度和鲁棒性。
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引用次数: 0
Estimator-based multi-target tracking of networked robotic systems via predefined-time hierarchical control method 通过预定义时间分层控制法实现基于估算器的联网机器人系统多目标跟踪
Pub Date : 2024-03-15 DOI: 10.1177/01423312241235108
Meixue Wang, B. Xiao, Tao Han, Huaicheng Yan
In this paper, we study the multi-target tracking problem of networked robotic systems (NRSs) within predefined time under a directed interaction topology considering disturbances and physical parameter uncertainties. On the basis of non-singular sliding-mode surface, a new predefined-time estimator-based hierarchical control algorithm is put forward so as to address the tracking problem under the case of multiple moving targets. Using the time base generator (TBG), a distributed estimator algorithm is designed to ensure that the followers can estimate different target states within a predefined-time. Certain sufficient conditions of predefined-time multi-target tracking of NRSs are presented using the Lyapunov stability and neighbor information interaction principle. In the end, numerical simulation experiments are offered to indicate the availability and correctness of the theoretical results.
本文研究了在考虑干扰和物理参数不确定性的定向交互拓扑结构下,网络机器人系统(NRS)在预定时间内的多目标跟踪问题。在非矢量滑模曲面的基础上,提出了一种新的基于预定义时间估计器的分层控制算法,以解决多运动目标情况下的跟踪问题。利用时基发生器(TBG)设计了一种分布式估计算法,以确保跟随者能在预定义时间内估计出不同的目标状态。利用 Lyapunov 稳定性和相邻信息交互原理,提出了 NRS 预定义时间多目标跟踪的某些充分条件。最后,还提供了数值模拟实验来说明理论结果的可用性和正确性。
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引用次数: 0
Improved Stanley guidance law–based adaptive path-following control of underactuated ship with state-constrained and time-varying drift angle 基于斯坦利制导定律的改进型自适应路径跟踪控制,用于具有状态约束和时变漂移角的欠驱动船舶
Pub Date : 2024-03-15 DOI: 10.1177/01423312241235234
Xiao Qin, Zhipeng Shen, Hongbo Bi, Haomiao Yu
To improve the following performance in large curve path and time-varying drift angle, a reduced-order extended state observer is added to the Improved Stanley Guidance Law (EISGL). Combining with the dynamic surface control (DSC), an adaptive auxiliary system is simultaneously built to compensate for the effect of the state constraints on the system. A barrier Lyapunov function combined with a prescribed performance function is designed to constrain the heading angle error of path following. Adaptive laws are also designed to approximate errors, estimating perturbation in poor sea condition. Lyapunov stability analysis shows that all signals are semi-global coherent and eventually bounded. In conclusion, the numerical comparison simulation experiments verify that the scheme has a strong anti-jamming capability and achieves good path following in large curve path.
为了改善大曲线路径和时变漂移角下的跟随性能,在改进的斯坦利制导法则(EISGL)中加入了一个降阶扩展状态观测器。结合动态表面控制(DSC),同时建立了一个自适应辅助系统,以补偿状态约束对系统的影响。设计了一个与规定性能函数相结合的屏障 Lyapunov 函数,以限制路径跟踪的航向角误差。还设计了自适应法则来近似误差,估计恶劣海况下的扰动。Lyapunov 稳定性分析表明,所有信号都是半全局相干的,并且最终都是有界的。总之,数值对比模拟实验验证了该方案具有很强的抗干扰能力,并在大曲线路径中实现了良好的路径跟踪。
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引用次数: 0
Nonsingular adaptive finite-time consensus control for uncertain nonlinear multi-agent systems with input quantization 带输入量化的不确定非线性多代理系统的非奇异自适应有限时间共识控制
Pub Date : 2024-03-13 DOI: 10.1177/01423312241229388
Yunbiao Jiang, Fuyong Wang, Zhongxin Liu, Zengqiang Chen
This paperinvestigates the distributed consensus control for nonlinear multi-agent systems with input quantization in a directed communication topology. A nonsingular adaptive finite-time control (NAFTC) scheme is proposed by combining the filtered backstepping method with neural network control. Both chattering and singularity problems of the control signals are avoided thanks to its [Formula: see text] continuity, so that the contradiction between discontinuous- and [Formula: see text] continuous finite-time control with input quantization does not exist in our scheme. At the same time, a novel inequality for the input-output relationship of hysteresis quantizer is derived, which can simply handle the input quantization without requiring additional stability analysis. What is more, some common assumptions, such as Lipschitz assumption and Holder-continuity assumption, are not required in our scheme. Finally, stability analysis and numerical simulation are provided.
本文研究了有向通信拓扑中输入量化的非线性多代理系统的分布式共识控制。通过将滤波反步法与神经网络控制相结合,提出了一种非奇异自适应有限时间控制(NAFTC)方案。由于[公式:见正文]的连续性,控制信号的颤振和奇异性问题都得以避免,因此在我们的方案中不存在输入量化的不连续有限时间控制与[公式:见正文]连续有限时间控制之间的矛盾。同时,我们还推导出了滞后量化器输入输出关系的新不等式,它可以简单地处理输入量化,而不需要额外的稳定性分析。此外,我们的方案不需要一些常见的假设,如 Lipschitz 假设和 Holder-continuity 假设。最后,我们还提供了稳定性分析和数值模拟。
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引用次数: 0
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Transactions of the Institute of Measurement and Control
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