Pub Date : 2012-10-01DOI: 10.1109/CCA.2012.6402437
V. Sima, P. Benner, D. Kressner
The latest developments of the SLICOT Library based on structure preserving algorithms for solving eigenproblems with Hamiltonian matrices and skew-Hamiltonian/Hamiltonian matrix pencils are discussed. An important application benefiting from these advances is the computation of ℒ∞-norms of linear time-invariant multivariable systems. It is shown that this approach delivers accurate results and it is much faster than the state-of-the-art tools.
{"title":"New SLICOT routines based on structured eigensolvers","authors":"V. Sima, P. Benner, D. Kressner","doi":"10.1109/CCA.2012.6402437","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402437","url":null,"abstract":"The latest developments of the SLICOT Library based on structure preserving algorithms for solving eigenproblems with Hamiltonian matrices and skew-Hamiltonian/Hamiltonian matrix pencils are discussed. An important application benefiting from these advances is the computation of ℒ∞-norms of linear time-invariant multivariable systems. It is shown that this approach delivers accurate results and it is much faster than the state-of-the-art tools.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130299062","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402355
A. Rauh, Luise Senkel, H. Aschemann, G. Kostin, V. Saurin
A large variety of technical systems is characterized by process variables which do not only depend on time but which also depend on at least one spatial coordinate. Such processes are typically contained in systems for heat and mass transfer as well as in flexible mechanical structures. Mathematical descriptions for such systems are generally given in terms of partial differential equations. To derive control and state estimation approaches which can be evaluated in real time, these infinite-dimensional models are commonly reduced to a finite-dimensional description. In this paper, different strategies are derived which, on the one hand, allow for a derivation of finite-dimensional representations on the basis of the method of integrodifferential relations and, on the other hand, allow for a reliable quantification of the resulting approximation quality. As application scenarios, an energy-optimal heating-up strategy based on Pontryagin's maximum principle as well as state and disturbance estimation procedures are presented for a one-dimensional heat transfer process.
{"title":"Reliable finite-dimensional models with guaranteed approximation quality for control of distributed parameter systems","authors":"A. Rauh, Luise Senkel, H. Aschemann, G. Kostin, V. Saurin","doi":"10.1109/CCA.2012.6402355","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402355","url":null,"abstract":"A large variety of technical systems is characterized by process variables which do not only depend on time but which also depend on at least one spatial coordinate. Such processes are typically contained in systems for heat and mass transfer as well as in flexible mechanical structures. Mathematical descriptions for such systems are generally given in terms of partial differential equations. To derive control and state estimation approaches which can be evaluated in real time, these infinite-dimensional models are commonly reduced to a finite-dimensional description. In this paper, different strategies are derived which, on the one hand, allow for a derivation of finite-dimensional representations on the basis of the method of integrodifferential relations and, on the other hand, allow for a reliable quantification of the resulting approximation quality. As application scenarios, an energy-optimal heating-up strategy based on Pontryagin's maximum principle as well as state and disturbance estimation procedures are presented for a one-dimensional heat transfer process.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130634845","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402714
A. Fekih, Shankar R. Seelem
A fault tolerant control approach that combines the optimal properties of Linear Quadratic Regulator (LQR) design with an observer based fault detection scheme is proposed for the steering control of a ground vehicle subject to sensor faults. In the proposed approach the linear quadratic regulator is used to steer the ground vehicle along a reference line in the lane, while maintaining small steady state error with minimum control cost. The system is augmented with an observer based fault detection method to detect, identify and accommodate sensor faults, when they occur. Computer simulations show the effectiveness of the proposed fault tolerant control strategy under various driving conditions. Simplicity of the overall scheme, minimization of the required energy and the stabilization of the system under both faulty and fault free conditions are the main positive features of the proposed approach.
{"title":"A fault tolerant control design for automatic steering control of ground vehicles","authors":"A. Fekih, Shankar R. Seelem","doi":"10.1109/CCA.2012.6402714","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402714","url":null,"abstract":"A fault tolerant control approach that combines the optimal properties of Linear Quadratic Regulator (LQR) design with an observer based fault detection scheme is proposed for the steering control of a ground vehicle subject to sensor faults. In the proposed approach the linear quadratic regulator is used to steer the ground vehicle along a reference line in the lane, while maintaining small steady state error with minimum control cost. The system is augmented with an observer based fault detection method to detect, identify and accommodate sensor faults, when they occur. Computer simulations show the effectiveness of the proposed fault tolerant control strategy under various driving conditions. Simplicity of the overall scheme, minimization of the required energy and the stabilization of the system under both faulty and fault free conditions are the main positive features of the proposed approach.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132292436","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402465
G. Rakocevic, Z. Sustran, V. Milutinovic
The modified Split Temporal/Spatial (STS) cache, described in this paper, introduces a different internal organizations of the Split Temporal/Spatial Cache, for better utilization of data characteristics. Conducted simulations show substantial improvements over traditional cache systems, with little increase in surface area and power consumption.
{"title":"A modified Split Temporal/Spatial Cache","authors":"G. Rakocevic, Z. Sustran, V. Milutinovic","doi":"10.1109/CCA.2012.6402465","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402465","url":null,"abstract":"The modified Split Temporal/Spatial (STS) cache, described in this paper, introduces a different internal organizations of the Split Temporal/Spatial Cache, for better utilization of data characteristics. Conducted simulations show substantial improvements over traditional cache systems, with little increase in surface area and power consumption.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129614160","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402722
N. Bajçinca, S. Hofmann
Optimal control of multivariate particulate processes in the context of crystal morphology manipulation is discussed in this work. The presented solution based on a conjunction of the method of characteristics, the minimum principle and a coordinate transformation in the property space of the underlying population balance equation extends a previous authors' approach to the broader class of crystallization processes involving size-dependent growth kinetics. As a consequence of a model idealization, the proposed methodology leads to low order boundary value problems resulting in computationally efficient near-optimal solutions.
{"title":"Optimal control of multivariate crystallization processes with size-dependent growth kinetics","authors":"N. Bajçinca, S. Hofmann","doi":"10.1109/CCA.2012.6402722","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402722","url":null,"abstract":"Optimal control of multivariate particulate processes in the context of crystal morphology manipulation is discussed in this work. The presented solution based on a conjunction of the method of characteristics, the minimum principle and a coordinate transformation in the property space of the underlying population balance equation extends a previous authors' approach to the broader class of crystallization processes involving size-dependent growth kinetics. As a consequence of a model idealization, the proposed methodology leads to low order boundary value problems resulting in computationally efficient near-optimal solutions.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133564262","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402672
M. Seker, E. Zergeroglu, E. Tatlicioglu
In this study, we present a robust backstepping approach for the control problem of the variable speed wind turbine with permanent magnet synchronous generator. Specifically to overcome the negative effects of parametric uncertainty, of both mechanical and electrical sub-systems, a differentiable robust controller has been proposed. The proposed methodology ensures the generator velocity tracking error to uniformly approach a small bound where practical tracking is achieved. Stability of the overall system is ensured by Lyapunov-based analysis techniques. Simulation studies are presented to illustrate the feasibility and efficiency of the proposed controller.
{"title":"Robust backstepping control of variable speed wind turbines with permanent magnet synchronous generators","authors":"M. Seker, E. Zergeroglu, E. Tatlicioglu","doi":"10.1109/CCA.2012.6402672","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402672","url":null,"abstract":"In this study, we present a robust backstepping approach for the control problem of the variable speed wind turbine with permanent magnet synchronous generator. Specifically to overcome the negative effects of parametric uncertainty, of both mechanical and electrical sub-systems, a differentiable robust controller has been proposed. The proposed methodology ensures the generator velocity tracking error to uniformly approach a small bound where practical tracking is achieved. Stability of the overall system is ensured by Lyapunov-based analysis techniques. Simulation studies are presented to illustrate the feasibility and efficiency of the proposed controller.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132498796","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402656
J. Jugo, M. Eguiraun
The ion sources are the first step in particle accelerators, which are important instruments in today's scientific advance, with multiple applications. The design and construction of those machines involves complex technical challenges. One of the keys in the correct operation of an Ion Source is the control system. In this work, an event-based control of the temperature in the transport line and cesium boilers is presented, necessary elements in a Penning-type ion source. The main objective of the controller is to maintain a constant temperature in the transport line and the boiler, providing an adequate concentration of cesium in the plasma chamber. The event-based nature of the controller reduces the control rate and, hence, the activity of the actuators. Therefore, the lifetime of the devices is increased, improving system reliability.
{"title":"Event-based temperature control system in a penning-type ion source","authors":"J. Jugo, M. Eguiraun","doi":"10.1109/CCA.2012.6402656","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402656","url":null,"abstract":"The ion sources are the first step in particle accelerators, which are important instruments in today's scientific advance, with multiple applications. The design and construction of those machines involves complex technical challenges. One of the keys in the correct operation of an Ion Source is the control system. In this work, an event-based control of the temperature in the transport line and cesium boilers is presented, necessary elements in a Penning-type ion source. The main objective of the controller is to maintain a constant temperature in the transport line and the boiler, providing an adequate concentration of cesium in the plasma chamber. The event-based nature of the controller reduces the control rate and, hence, the activity of the actuators. Therefore, the lifetime of the devices is increased, improving system reliability.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116054826","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402428
P. Andersen, T. Pedersen, K. M. Nielsen
The extensive growth of installed wind energy plants in Denmark leads to increasing balancing problems in the power grid due to the nature of wind fields and variations in consumption. One way to overcome these problems is to move consumption to times where wind power otherwise cause overproduction. A part of a solution can be to take advantage of floor heat capacity in single-family houses using heat pumps. This large heat capacity makes it possible to move consumption without compromising the comfort of house residents. In a Danish research project a virtual power plant using centralized control of a large number of houses with heat pumps is established. In order to make the control algorithm a vital part is a dynamic model of each house. The model predicts the house indoor temperature when heat pump power and outdoor temperature is known. The model must be able to describe a large variety of heat pumps and houses. In the paper a house model and a method to identify the model is presented. The Kalman observer models are optimized using measurements from real houses.
{"title":"Observer based model identification of heat pumps in a smart grid","authors":"P. Andersen, T. Pedersen, K. M. Nielsen","doi":"10.1109/CCA.2012.6402428","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402428","url":null,"abstract":"The extensive growth of installed wind energy plants in Denmark leads to increasing balancing problems in the power grid due to the nature of wind fields and variations in consumption. One way to overcome these problems is to move consumption to times where wind power otherwise cause overproduction. A part of a solution can be to take advantage of floor heat capacity in single-family houses using heat pumps. This large heat capacity makes it possible to move consumption without compromising the comfort of house residents. In a Danish research project a virtual power plant using centralized control of a large number of houses with heat pumps is established. In order to make the control algorithm a vital part is a dynamic model of each house. The model predicts the house indoor temperature when heat pump power and outdoor temperature is known. The model must be able to describe a large variety of heat pumps and houses. In the paper a house model and a method to identify the model is presented. The Kalman observer models are optimized using measurements from real houses.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131835004","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402739
S. Fekri, F. Assadian
In this paper, we overview the design and development of robust multivariable control design to highlight some of the pragmatic automotive engineering control issues with an emphasis on a non-trivial application of Hybrid Electric Vehicle (HEV) Torque Management. We shall outline that most existing torque management approaches are not model-based dynamical systems, or do not address key concepts of robust stability and performance. We shall also discuss some advantages that robust control systems could offer to a wider automotive control applications. In part II, we show representative simulation results verifying that robust control systems design could be a breakthrough to the production of hybrid electric vehicles by yielding significant improvements on the emission, fuel consumption, calibration time and cost. Our contribution is aimed at the fact that cutting-edge robust controllers could be broadly adopted to tackle increasingly challenging problems of the automotive industry.
{"title":"The role and use of robust multivariable control in hybrid electric vehicle energy management - Part I: An overview","authors":"S. Fekri, F. Assadian","doi":"10.1109/CCA.2012.6402739","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402739","url":null,"abstract":"In this paper, we overview the design and development of robust multivariable control design to highlight some of the pragmatic automotive engineering control issues with an emphasis on a non-trivial application of Hybrid Electric Vehicle (HEV) Torque Management. We shall outline that most existing torque management approaches are not model-based dynamical systems, or do not address key concepts of robust stability and performance. We shall also discuss some advantages that robust control systems could offer to a wider automotive control applications. In part II, we show representative simulation results verifying that robust control systems design could be a breakthrough to the production of hybrid electric vehicles by yielding significant improvements on the emission, fuel consumption, calibration time and cost. Our contribution is aimed at the fact that cutting-edge robust controllers could be broadly adopted to tackle increasingly challenging problems of the automotive industry.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132158382","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 : 2012-10-01DOI: 10.1109/CCA.2012.6402431
B. Németh, P. Gáspár
The paper proposes an integration of the steering system and a variable-geometry suspension system as part of a driver assistance system. The predefined trajectory required by the driver is followed with a steering command. During maneuvers the control system generates an auxiliary front steering angle and the camber angle of the front wheels according to driver demands in order to improve road stability. Simultaneously, the variable-geometry suspension system is able to modify the camber angle of the wheels in order to improve the half-track change. The design of an integrated control system is based on the robust H∞ method, which meets the performance specifications and guarantees robustness against model uncertainties. The efficiency of the actuator integration is guaranteed by a reachable set. The operation of the control system is illustrated through a simulation example.
{"title":"Control design based on the integration of steering and suspension systems","authors":"B. Németh, P. Gáspár","doi":"10.1109/CCA.2012.6402431","DOIUrl":"https://doi.org/10.1109/CCA.2012.6402431","url":null,"abstract":"The paper proposes an integration of the steering system and a variable-geometry suspension system as part of a driver assistance system. The predefined trajectory required by the driver is followed with a steering command. During maneuvers the control system generates an auxiliary front steering angle and the camber angle of the front wheels according to driver demands in order to improve road stability. Simultaneously, the variable-geometry suspension system is able to modify the camber angle of the wheels in order to improve the half-track change. The design of an integrated control system is based on the robust H∞ method, which meets the performance specifications and guarantees robustness against model uncertainties. The efficiency of the actuator integration is guaranteed by a reachable set. The operation of the control system is illustrated through a simulation example.","PeriodicalId":284064,"journal":{"name":"2012 IEEE International Conference on Control Applications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128409414","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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