Pub Date : 2009-07-08DOI: 10.1109/CCA.2009.5281075
Y. Uchiyama, M. Fujita
This paper presents a disturbance-force compensator for an electrodynamic shaker. The characteristic of a shaking system is considered to be nonlinear and variable because of the influence of the test piece. In order to compensate for this problem, the influence of the disturbance force needs to be suppressed. The controller is designed using μ-synthesis by considering the uncertainty of the shaker. In order to investigate the control performance for the influence of friction and sloshing, the time waveform replication testing is executed. Finally, because the disturbance-force compensator suppresses the nonlinear characteristic, the good performance is confirmed with the help of experiments conducted using the actual equipment.
{"title":"Robust control using disturbance force compensator and time waveform replication for an electrodynamic shaker","authors":"Y. Uchiyama, M. Fujita","doi":"10.1109/CCA.2009.5281075","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281075","url":null,"abstract":"This paper presents a disturbance-force compensator for an electrodynamic shaker. The characteristic of a shaking system is considered to be nonlinear and variable because of the influence of the test piece. In order to compensate for this problem, the influence of the disturbance force needs to be suppressed. The controller is designed using μ-synthesis by considering the uncertainty of the shaker. In order to investigate the control performance for the influence of friction and sloshing, the time waveform replication testing is executed. Finally, because the disturbance-force compensator suppresses the nonlinear characteristic, the good performance is confirmed with the help of experiments conducted using the actual equipment.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124315318","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281062
Miguel Castano Arranz, W. Birk
The selection of the structure of a controller in large scale industry processes requires extensive process knowledge. The aim of this paper is to present methods which help designers to comprehend a process by representing structural and functional relationships from actuators and process disturbances to measured or estimated variables. This paper describes similarities between brain connectivity theory and interaction analysis in multivariable processes. Results from both theories are combined to create new methods for the analysis of industry processes. The developed methods are applied to an illustrative example.
{"title":"New methods for structural and functional analysis of complex processes","authors":"Miguel Castano Arranz, W. Birk","doi":"10.1109/CCA.2009.5281062","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281062","url":null,"abstract":"The selection of the structure of a controller in large scale industry processes requires extensive process knowledge. The aim of this paper is to present methods which help designers to comprehend a process by representing structural and functional relationships from actuators and process disturbances to measured or estimated variables. This paper describes similarities between brain connectivity theory and interaction analysis in multivariable processes. Results from both theories are combined to create new methods for the analysis of industry processes. The developed methods are applied to an illustrative example.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124412085","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281084
C. Seatzu, C. Mahulea, M. P. Cabasino, M. Suárez
Continuous Petri nets can be viewed as an approximation of the classical discrete models introduced to cope with the state explosion problem typical of discrete event systems. In this paper we consider free-labeled Petri net systems, and assume that certain transitions, including all those modeling faulty behaviors, are unobservable, i.e., they are labeled with the empty word. Based on the notion and characterization of the set of justifications of a given observation (and the corresponding set of j-vectors), we provide a diagnosis approach using the solution of a certain number of linear programming problems.
{"title":"Fault diagnoser design for untimed continuous Petri nets","authors":"C. Seatzu, C. Mahulea, M. P. Cabasino, M. Suárez","doi":"10.1109/CCA.2009.5281084","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281084","url":null,"abstract":"Continuous Petri nets can be viewed as an approximation of the classical discrete models introduced to cope with the state explosion problem typical of discrete event systems. In this paper we consider free-labeled Petri net systems, and assume that certain transitions, including all those modeling faulty behaviors, are unobservable, i.e., they are labeled with the empty word. Based on the notion and characterization of the set of justifications of a given observation (and the corresponding set of j-vectors), we provide a diagnosis approach using the solution of a certain number of linear programming problems.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127400089","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 : 2009-07-08DOI: 10.1109/CCA.2009.5280864
L. Fesquet, Hatem Zakaria
The design of integrated circuits, especially System-on-Chips (SoC) is now constrained by many parameters such as speed, energy but also the robustness to process variability. Indeed, controlling the speed and the energy in a complex SoCs - which adopt the Globally Asynchronous Locally Synchronous (GALS) paradigm - require specific power supplies and clock generators as actuators and dedicated sensors. The problem faced by the designers is the non-uniform and non-predictable behaviour of such systems which embed several microprocessors and complex Network-on-Chips (NoC). In these conditions, the control laws are difficult to establish. Moreover, with the technology shrink, the control needs are increased. In order to reach an acceptable fabrication yield, the clock synchronisation - based on the assumption that the critical path is shorter than the clock period - is impracticable with large SoCs which are divided in multiple clock domains. This is why specific sensors are used to evaluate the fabrication process quality and the local environmental parameters (voltage, temperature) in each clock region in order to determine the appropriate clock frequency which does not violate the local timing constraint. All these systems are fed back and required well-suited control techniques able to manage process variability as well as energy or speed.
{"title":"Controlling energy and process variability in System-on-Chips: needs for control theory","authors":"L. Fesquet, Hatem Zakaria","doi":"10.1109/CCA.2009.5280864","DOIUrl":"https://doi.org/10.1109/CCA.2009.5280864","url":null,"abstract":"The design of integrated circuits, especially System-on-Chips (SoC) is now constrained by many parameters such as speed, energy but also the robustness to process variability. Indeed, controlling the speed and the energy in a complex SoCs - which adopt the Globally Asynchronous Locally Synchronous (GALS) paradigm - require specific power supplies and clock generators as actuators and dedicated sensors. The problem faced by the designers is the non-uniform and non-predictable behaviour of such systems which embed several microprocessors and complex Network-on-Chips (NoC). In these conditions, the control laws are difficult to establish. Moreover, with the technology shrink, the control needs are increased. In order to reach an acceptable fabrication yield, the clock synchronisation - based on the assumption that the critical path is shorter than the clock period - is impracticable with large SoCs which are divided in multiple clock domains. This is why specific sensors are used to evaluate the fabrication process quality and the local environmental parameters (voltage, temperature) in each clock region in order to determine the appropriate clock frequency which does not violate the local timing constraint. All these systems are fed back and required well-suited control techniques able to manage process variability as well as energy or speed.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114920953","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281151
I. Boiko
Nominal precision of state observation and bandwidth of sliding mode (SM) observers are analyzed through the frequency-domain method. The previously developed approach to analysis of SM observers as relay feedback-feedforward systems is used and further extended to analysis of effects of design parameter change on observer performance. An example of SM observer design for estimation of DC motor speed from the measurements of armature current is considered in the paper. The input-output properties of observer dynamics are analyzed with the use of the Locus of a Perturbed Relay System (LPRS) method.
{"title":"Analysis of precision and design of sliding mode observers","authors":"I. Boiko","doi":"10.1109/CCA.2009.5281151","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281151","url":null,"abstract":"Nominal precision of state observation and bandwidth of sliding mode (SM) observers are analyzed through the frequency-domain method. The previously developed approach to analysis of SM observers as relay feedback-feedforward systems is used and further extended to analysis of effects of design parameter change on observer performance. An example of SM observer design for estimation of DC motor speed from the measurements of armature current is considered in the paper. The input-output properties of observer dynamics are analyzed with the use of the Locus of a Perturbed Relay System (LPRS) method.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127186210","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281014
V. Yurkevich
The paper treats a question of adaptive proportional-integral (PI) and adaptive proportional-integral-derivative (PID) controller design for nonlinear systems as well as the design of a universal adaptive controller which is an extension of the adaptive PI (PID) control scheme. The presented design methodology guarantees desired output transient performance indices by inducing of two-time-scale motions in the closed-loop system where the controller dynamics is a singular perturbation with respect to the system dynamics. Stability conditions imposed on the fast and slow modes and sufficiently large mode separation rate between fast and slow modes can ensure that the full-order closed-loop nonlinear system achieves the desired properties in such a way that the output transient performances are desired and insensitive to external disturbances and plant's parameter variations. The novelty in the paper is that the high-frequency-gain online identification and adaptive gain tuning are incorporated in the control system in order to maintain the two-time-scale structure in the closed-loop system trajectories and stability of fast-motion transients for a large range of plant's parameter variations. The singular perturbation method is used through-out the paper in order to get explicit expressions for evaluation of the controller parameters. Numerical example and simulation results are presented.
{"title":"Adaptive gain tuning in nonlinear control systems designed via singular perturbation technique","authors":"V. Yurkevich","doi":"10.1109/CCA.2009.5281014","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281014","url":null,"abstract":"The paper treats a question of adaptive proportional-integral (PI) and adaptive proportional-integral-derivative (PID) controller design for nonlinear systems as well as the design of a universal adaptive controller which is an extension of the adaptive PI (PID) control scheme. The presented design methodology guarantees desired output transient performance indices by inducing of two-time-scale motions in the closed-loop system where the controller dynamics is a singular perturbation with respect to the system dynamics. Stability conditions imposed on the fast and slow modes and sufficiently large mode separation rate between fast and slow modes can ensure that the full-order closed-loop nonlinear system achieves the desired properties in such a way that the output transient performances are desired and insensitive to external disturbances and plant's parameter variations. The novelty in the paper is that the high-frequency-gain online identification and adaptive gain tuning are incorporated in the control system in order to maintain the two-time-scale structure in the closed-loop system trajectories and stability of fast-motion transients for a large range of plant's parameter variations. The singular perturbation method is used through-out the paper in order to get explicit expressions for evaluation of the controller parameters. Numerical example and simulation results are presented.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116800749","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 : 2009-07-08DOI: 10.1109/CCA.2009.5280993
R. Ruiz-Cruz, E. Sánchez, A. Loukianov
In this paper, the authors propose a block control scheme using sliding modes, for a double fed induction generator connected to an infinity bus. To estimate the mechanical torque, a nonlinear observer is utilized; additionally, as a viable alternative, to eliminate the requirement on this estimation, an integrator is included. To reduce the effect of parameter variations, the one step delayed disturbance algorithm is used. The stability of the closed loop system is analyzed by the Lyapunov techniques. The applicability of the proposed scheme is tested via simulations.
{"title":"Discrete time block control of a double fed induction generator using sliding modes","authors":"R. Ruiz-Cruz, E. Sánchez, A. Loukianov","doi":"10.1109/CCA.2009.5280993","DOIUrl":"https://doi.org/10.1109/CCA.2009.5280993","url":null,"abstract":"In this paper, the authors propose a block control scheme using sliding modes, for a double fed induction generator connected to an infinity bus. To estimate the mechanical torque, a nonlinear observer is utilized; additionally, as a viable alternative, to eliminate the requirement on this estimation, an integrator is included. To reduce the effect of parameter variations, the one step delayed disturbance algorithm is used. The stability of the closed loop system is analyzed by the Lyapunov techniques. The applicability of the proposed scheme is tested via simulations.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132819735","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281048
H. Kaji, H. Katayama
Digital control problems for dynamically positioned ships are considered by nonlinear sampled-data control theory based on Euler approximate models. State feedback laws that guarantee semeglobal practical asymptotic (SPA) stability of ships are designed. Then the reference signals for the position and the attitude of ships are introduced and state feedback tracking laws are also designed. The effectiveness of the designed feedback laws is demonstrated via experiments by using a small test boat.
{"title":"Digital control problems for dynamically positioned ships","authors":"H. Kaji, H. Katayama","doi":"10.1109/CCA.2009.5281048","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281048","url":null,"abstract":"Digital control problems for dynamically positioned ships are considered by nonlinear sampled-data control theory based on Euler approximate models. State feedback laws that guarantee semeglobal practical asymptotic (SPA) stability of ships are designed. Then the reference signals for the position and the attitude of ships are introduced and state feedback tracking laws are also designed. The effectiveness of the designed feedback laws is demonstrated via experiments by using a small test boat.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"322 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132910788","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281158
I. Boiko, Xi Sun, E. Tamayo
A methodology of analysis of stability and performance of variable structure (VS) PID controllers is proposed. It is proposed that stability of the VS system can be approximately assessed via the describing function method. The describing function of the VS PID controller is derived. It is shown that the system with the VS PID controller is quasilinear. Tuning rules for VS PI controller for the level process are given. It is shown that the VS PI controller has higher performance than the conventional PI controller for the process considered.
{"title":"Performance analysis and tuning of variable-structure PID controllers for level process","authors":"I. Boiko, Xi Sun, E. Tamayo","doi":"10.1109/CCA.2009.5281158","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281158","url":null,"abstract":"A methodology of analysis of stability and performance of variable structure (VS) PID controllers is proposed. It is proposed that stability of the VS system can be approximately assessed via the describing function method. The describing function of the VS PID controller is derived. It is shown that the system with the VS PID controller is quasilinear. Tuning rules for VS PI controller for the level process are given. It is shown that the VS PI controller has higher performance than the conventional PI controller for the process considered.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128206841","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 : 2009-07-08DOI: 10.1109/CCA.2009.5281052
D. Zavalishchin, G. Timofeeva
This paper presents the mathematical model describing movement of vehicles through adjustable crossroads. The model is based on the theory of queuing. The stationary modes of the system are investigated, the problem of optimal duration of traffic light cycle is studied.
{"title":"Mathematical modelling of vehicle flow on a crossroads","authors":"D. Zavalishchin, G. Timofeeva","doi":"10.1109/CCA.2009.5281052","DOIUrl":"https://doi.org/10.1109/CCA.2009.5281052","url":null,"abstract":"This paper presents the mathematical model describing movement of vehicles through adjustable crossroads. The model is based on the theory of queuing. The stationary modes of the system are investigated, the problem of optimal duration of traffic light cycle is studied.","PeriodicalId":294950,"journal":{"name":"2009 IEEE Control Applications, (CCA) & Intelligent Control, (ISIC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132257816","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}
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