Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862291
R. Nistal, M. Sen, S. Alonso-Quesada, A. Ibeas
A mathematical model describing a generic disease is introduced and the dynamics of the subpopulations are studied. Through linearization of the continuous-time model, the stability of the equilibrium points and the characteristics of the disease are defined properly. Due to the nature of the disease, the model is discretized in order to apply some adaptive vaccination strategies involving feedback loops. Furthermore, such techniques are compared to the traditional regular-vaccination strategies. The obtained results indicate a possible improvement in the use of the adaptive strategies for vaccination.
{"title":"A nonlinear SEIR epidemic model with feedback vaccination control","authors":"R. Nistal, M. Sen, S. Alonso-Quesada, A. Ibeas","doi":"10.1109/ECC.2014.6862291","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862291","url":null,"abstract":"A mathematical model describing a generic disease is introduced and the dynamics of the subpopulations are studied. Through linearization of the continuous-time model, the stability of the equilibrium points and the characteristics of the disease are defined properly. Due to the nature of the disease, the model is discretized in order to apply some adaptive vaccination strategies involving feedback loops. Furthermore, such techniques are compared to the traditional regular-vaccination strategies. The obtained results indicate a possible improvement in the use of the adaptive strategies for vaccination.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121847176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862461
L. Vanbeylen, A. Van Mulders
Recently, the nonlinear LFR model has been proposed as a candidate model with high potential, due to its surprising flexibility and parsimony. It is a quite general block-oriented model consisting of a static nonlinearity (SNL) and multiple-input-multiple-output (MIMO) dynamics. It can cope with both nonlinear feedforward and nonlinear feedback effects and does not postulate the SNL's location prior to the identification. This contribution extends the model from single-input-single-output (SISO) to MIMO. Starting from two classical frequency response measurements of the system, the method delivers the best possible MIMO dynamics and estimates the SNL in an automated, user-friendly, non-iterative way, with an improved computational efficiency. The method is successfully applied on a numerical simulation example to illustrate the theory.
{"title":"Identification method for nonlinear LFR block-oriented models with multiple inputs and outputs","authors":"L. Vanbeylen, A. Van Mulders","doi":"10.1109/ECC.2014.6862461","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862461","url":null,"abstract":"Recently, the nonlinear LFR model has been proposed as a candidate model with high potential, due to its surprising flexibility and parsimony. It is a quite general block-oriented model consisting of a static nonlinearity (SNL) and multiple-input-multiple-output (MIMO) dynamics. It can cope with both nonlinear feedforward and nonlinear feedback effects and does not postulate the SNL's location prior to the identification. This contribution extends the model from single-input-single-output (SISO) to MIMO. Starting from two classical frequency response measurements of the system, the method delivers the best possible MIMO dynamics and estimates the SNL in an automated, user-friendly, non-iterative way, with an improved computational efficiency. The method is successfully applied on a numerical simulation example to illustrate the theory.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121617691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862427
Balázs Varga, B. Németh, P. Gáspár
The paper proposes a hierarchical control design of an electro-hydraulic actuator, which is incorporated in the active anti-roll bars. The aim of the control system is to generate a reference torque, which is required by the vehicle dynamic control. The control-oriented model of the actuator is formulated in two subsystems. The upper-level hydromotor is described in a linear form, while the lower-level spool valve is a polynomial system. These subsystems require different control strategies. At the upper-level a Linear Parameter Varying control is used to guarantee performance specifications. At the lower-level a Control Lyapunov Function-based algorithm, which creates discrete control input values of the valve, is proposed. The interaction between the two subsystems is guaranteed by the spool displacement, which is control input for the upper-level and must be tracked by the lower-level control. The spool displacement has physical constraints, which must also be incorporated into the control design. The operation of the actuator control system is illustrated through a simulation example.
{"title":"Hierarchical design of electro-hydraulic actuator control for vehicle dynamic purposes","authors":"Balázs Varga, B. Németh, P. Gáspár","doi":"10.1109/ECC.2014.6862427","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862427","url":null,"abstract":"The paper proposes a hierarchical control design of an electro-hydraulic actuator, which is incorporated in the active anti-roll bars. The aim of the control system is to generate a reference torque, which is required by the vehicle dynamic control. The control-oriented model of the actuator is formulated in two subsystems. The upper-level hydromotor is described in a linear form, while the lower-level spool valve is a polynomial system. These subsystems require different control strategies. At the upper-level a Linear Parameter Varying control is used to guarantee performance specifications. At the lower-level a Control Lyapunov Function-based algorithm, which creates discrete control input values of the valve, is proposed. The interaction between the two subsystems is guaranteed by the spool displacement, which is control input for the upper-level and must be tracked by the lower-level control. The spool displacement has physical constraints, which must also be incorporated into the control design. The operation of the actuator control system is illustrated through a simulation example.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115972743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862324
Christian Rathgeber, F. Winkler, D. Odenthal, S. Müller
In this contribution a structure for high level lateral vehicle tracking control is presented. It is based on the two degrees of freedom structure that allows to separately define the command response and disturbance attenuation. The application of the disturbance observer guarantees robust compensation of the disturbances. An advantage of the presented structure is its robustness against variable vehicle parameters. Only a considerably reduced model is necessary which significantly simplifies the application process. Moreover the presented approach is characterized by its extensibility and its modularity.
{"title":"Lateral trajectory tracking control for autonomous vehicles","authors":"Christian Rathgeber, F. Winkler, D. Odenthal, S. Müller","doi":"10.1109/ECC.2014.6862324","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862324","url":null,"abstract":"In this contribution a structure for high level lateral vehicle tracking control is presented. It is based on the two degrees of freedom structure that allows to separately define the command response and disturbance attenuation. The application of the disturbance observer guarantees robust compensation of the disturbances. An advantage of the presented structure is its robustness against variable vehicle parameters. Only a considerably reduced model is necessary which significantly simplifies the application process. Moreover the presented approach is characterized by its extensibility and its modularity.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131361611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862574
F. J. Muros, J. Maestre, E. Algaba, T. Alamo, E. Camacho
We introduce several refinements in the design method of a coalitional control scheme for linear systems recently proposed. In this scheme, the network topology is modified in order to attain a trade-off between communication burden and overall system performance. In particular, all the communication links with low contribution to the overall performance are disconnected. Likewise, the control law is adapted to these changes. Given that the coalitional control scheme can be described as a cooperative game, it is possible to apply classical game theory results to gain insight into the distributed control problem. In this work, we show how the design method can be modified in order to include constraints regarding the game theoretical properties of the aforementioned scheme.
{"title":"Constraints on the shapley value for a coalitional control system","authors":"F. J. Muros, J. Maestre, E. Algaba, T. Alamo, E. Camacho","doi":"10.1109/ECC.2014.6862574","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862574","url":null,"abstract":"We introduce several refinements in the design method of a coalitional control scheme for linear systems recently proposed. In this scheme, the network topology is modified in order to attain a trade-off between communication burden and overall system performance. In particular, all the communication links with low contribution to the overall performance are disconnected. Likewise, the control law is adapted to these changes. Given that the coalitional control scheme can be described as a cooperative game, it is possible to apply classical game theory results to gain insight into the distributed control problem. In this work, we show how the design method can be modified in order to include constraints regarding the game theoretical properties of the aforementioned scheme.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131969764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862505
Baisi Liu, M. Ghazel, A. Toguyéni
This paper deals with the diagnosability of discrete event systems (DES) modeled by labeled Petri nets (LPNs). An additional parameter K ∈ ℕ, which is the number of observable events after an unobservable fault to ensure diagnosability, is discussed. With the incremental search of K, we transform the diagnosability problem into a series of K-diagnosability problems. For bounded diagnosable systems, Kmin, the minimum value of K to ensure diagnosability, can be eventually found. The state space is generated on the fly, without investigation of unnecessary states. This is a notable advantage compared with some existing methods, since just a part of the state space can often be sufficient to assess diagnosability.
{"title":"Toward an efficient approach for diagnosability analysis of DES modeled by labeled Petri nets","authors":"Baisi Liu, M. Ghazel, A. Toguyéni","doi":"10.1109/ECC.2014.6862505","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862505","url":null,"abstract":"This paper deals with the diagnosability of discrete event systems (DES) modeled by labeled Petri nets (LPNs). An additional parameter K ∈ ℕ, which is the number of observable events after an unobservable fault to ensure diagnosability, is discussed. With the incremental search of K, we transform the diagnosability problem into a series of K-diagnosability problems. For bounded diagnosable systems, Kmin, the minimum value of K to ensure diagnosability, can be eventually found. The state space is generated on the fly, without investigation of unnecessary states. This is a notable advantage compared with some existing methods, since just a part of the state space can often be sufficient to assess diagnosability.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132490255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862585
Chadia Zayane-Aissa, Dayan Liu, T. Laleg‐Kirati
In this paper, we address a special case of state and parameter estimation, where the system can be put on a cascade form allowing to estimate the state components and the set of unknown parameters separately. Inspired by the nonlinear Balloon hemodynamic model for functional Magnetic Resonance Imaging problem, we propose a hierarchical approach. The system is divided into two subsystems in cascade. The state and input are first estimated from a noisy measured signal using an adaptive observer. The obtained input is then used to estimate the parameters of a linear system using the modulating functions method. Some numerical results are presented to illustrate the efficiency of the proposed method.
{"title":"Joint state and parameter estimation for a class of cascade systems: Application to a hemodynamic model","authors":"Chadia Zayane-Aissa, Dayan Liu, T. Laleg‐Kirati","doi":"10.1109/ECC.2014.6862585","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862585","url":null,"abstract":"In this paper, we address a special case of state and parameter estimation, where the system can be put on a cascade form allowing to estimate the state components and the set of unknown parameters separately. Inspired by the nonlinear Balloon hemodynamic model for functional Magnetic Resonance Imaging problem, we propose a hierarchical approach. The system is divided into two subsystems in cascade. The state and input are first estimated from a noisy measured signal using an adaptive observer. The obtained input is then used to estimate the parameters of a linear system using the modulating functions method. Some numerical results are presented to illustrate the efficiency of the proposed method.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132500537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862531
C. Yfoulis, D. Giaouris, F. Stergiopoulos, C. Ziogou, S. Voutetakis, S. Papadopoulou
In this paper we describe a new methodology for designing robust and efficient state-feedback control laws for a switched-mode boost DC-DC power converter. The proposed design is adopting the so-called Lyapunov-based control law and attempts to solve the robust constrained stabilization problem under large parameter variations. With the methodology proposed static or switching state-feedback control laws are generated so that a number of further key issues are addressed, i.e. low complexity of the implementation, accurate nonlinear dynamics incorporation, nonconservative handling of hard state and control constraints, robustness to supply voltage variations, set-point and load changes. The control design procedure is based on the generation of controlled invariant polytopes (safety domains) using piecewise-linear Lyapunov functions. The proposed technique is numerically evaluated using the exact switched model of the converter.
{"title":"Robust constrained stabilization of a boost DC-DC converter with Lyapunov-based control and piecewise-linear Lyapunov functions","authors":"C. Yfoulis, D. Giaouris, F. Stergiopoulos, C. Ziogou, S. Voutetakis, S. Papadopoulou","doi":"10.1109/ECC.2014.6862531","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862531","url":null,"abstract":"In this paper we describe a new methodology for designing robust and efficient state-feedback control laws for a switched-mode boost DC-DC power converter. The proposed design is adopting the so-called Lyapunov-based control law and attempts to solve the robust constrained stabilization problem under large parameter variations. With the methodology proposed static or switching state-feedback control laws are generated so that a number of further key issues are addressed, i.e. low complexity of the implementation, accurate nonlinear dynamics incorporation, nonconservative handling of hard state and control constraints, robustness to supply voltage variations, set-point and load changes. The control design procedure is based on the generation of controlled invariant polytopes (safety domains) using piecewise-linear Lyapunov functions. The proposed technique is numerically evaluated using the exact switched model of the converter.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132500580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862445
Sebastien Varrier, D. Koenig, J. Martínez, B. d'Andréa-Novel
The objective of this paper is to design a new integrated methodology for the detection of a critical situation in vehicle longitudinal dynamics. In classical modern vehicle, the ABS - anti-lock braking system - (during bracking) and anti-skid (during accelerations) modules are acting separately. This paper presents an innovative methodology for the detection of longitudinal critical situations that can be used as an information for both ABS and anti-skid programs. The approach is based on the non-linear tire modeling that consists of three operating zones : normal zone, critical and skidding. The normal zone can be approximated by a linear representation of the tire force while this modeling is no longer acceptable in the other regions. Based on this statement, a robust fault detection methodology allows to detect the non-linear characteristics of the tire force representing the critical situation. Applicative results have been implemented on a 1/5th scale vehicle developed in the framework of the French national ANR INOVE project.
{"title":"Detection of critical situations for vehicle longitudinal dynamics","authors":"Sebastien Varrier, D. Koenig, J. Martínez, B. d'Andréa-Novel","doi":"10.1109/ECC.2014.6862445","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862445","url":null,"abstract":"The objective of this paper is to design a new integrated methodology for the detection of a critical situation in vehicle longitudinal dynamics. In classical modern vehicle, the ABS - anti-lock braking system - (during bracking) and anti-skid (during accelerations) modules are acting separately. This paper presents an innovative methodology for the detection of longitudinal critical situations that can be used as an information for both ABS and anti-skid programs. The approach is based on the non-linear tire modeling that consists of three operating zones : normal zone, critical and skidding. The normal zone can be approximated by a linear representation of the tire force while this modeling is no longer acceptable in the other regions. Based on this statement, a robust fault detection methodology allows to detect the non-linear characteristics of the tire force representing the critical situation. Applicative results have been implemented on a 1/5th scale vehicle developed in the framework of the French national ANR INOVE project.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130091984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-24DOI: 10.1109/ECC.2014.6862433
E. Canuto, L. Colangelo
The paper presents the design and some simulated results of the attitude control of a two-satellite formation under study by the European Space Agency for the Next Generation Gravity Mission. The formation spacecrafts, with a distance between them of more than 200 km and orbiting around the Earth at about 300 km altitude, must align their axis to the satellite-to-satellite line with a microradian accuracy (pointing control). This is made possible by specific optical sensors accompanying the inter-satellite laser interferometer. Such sensors allow each satellite to autonomously align after an acquisition procedure. Pointing control is constrained by the angular drag-free control, which, imposed by Earth gravimetry, must zero the spacecraft angular acceleration vector below 0.01 microradian/s2 in the science bandwidth. This is made possible by ultrafine accelerometers of the GOCE-class, whose measurements must be coordinated with attitude sensors to meet drag-free and pointing requirements. Embedded Model Control shows how coordination can be implemented around the embedded model of the spacecraft attitude and of the formation frame quaternion. Evidence and discussion about some critical requirements is also included.
{"title":"Angular drag-free control and fine satellite-to-satellite pointing for the Next Generation Gravity Missions","authors":"E. Canuto, L. Colangelo","doi":"10.1109/ECC.2014.6862433","DOIUrl":"https://doi.org/10.1109/ECC.2014.6862433","url":null,"abstract":"The paper presents the design and some simulated results of the attitude control of a two-satellite formation under study by the European Space Agency for the Next Generation Gravity Mission. The formation spacecrafts, with a distance between them of more than 200 km and orbiting around the Earth at about 300 km altitude, must align their axis to the satellite-to-satellite line with a microradian accuracy (pointing control). This is made possible by specific optical sensors accompanying the inter-satellite laser interferometer. Such sensors allow each satellite to autonomously align after an acquisition procedure. Pointing control is constrained by the angular drag-free control, which, imposed by Earth gravimetry, must zero the spacecraft angular acceleration vector below 0.01 microradian/s2 in the science bandwidth. This is made possible by ultrafine accelerometers of the GOCE-class, whose measurements must be coordinated with attitude sensors to meet drag-free and pointing requirements. Embedded Model Control shows how coordination can be implemented around the embedded model of the spacecraft attitude and of the formation frame quaternion. Evidence and discussion about some critical requirements is also included.","PeriodicalId":251538,"journal":{"name":"2014 European Control Conference (ECC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134516608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：