检索结果-内蒙古大学图书馆

ON COMPLEXITY ISSUES IN MULTIOBJECTIVE controlLER DESIGN USING CONVEX OPTIMIZATION

IFAC Proceedings Volumes 2006年第9期39卷 7-12页

作者： Jochen M. Rieber Carsten W. Scherer Frank Allgöwer Institute for Systems Theory in Engineering University of Stuttgart Pfaffenwaldring 9 70550 Stuttgart Germany Delft Center for Systems and Control Delft University of Technology Mekelweg 2 2628CD Delft The Netherlands

In multiobjective control of linear systems, critical issues are the size of optimization constraints, number of variables, and computation time. This paper investigates in a quantitative way, how some prominent methods from the literature behave with respect to these critical factors for different problem sizes. Moreover, an alternative formulation is proposed and compared to the existing approaches, showing its favorable properties for a selection of typical applications.

关键词： Multiobjective control H ∞ H 2 l 1 LMIs convex optimization

来源：评论

学校读者我要写书评

暂无评论

CONSTRAINED DERIVATIVE-FREE AUGMENTED STATE ESTIMATION FOR A DIESEL ENGINE AIR PATH

引用

IFAC Proceedings Volumes 2006年第1期39卷 1382-1387页

作者： Jochen Aßfalg Frank Allgöwer Martin Fritz Corporate Sector Research and Advance Engineering Mechatronic Engineering Robert Bosch GmbH 70442 Stuttgart Germany Institute for Systems Theory and Automatic Control University of Stuttgart 70550 Stuttgart Germany Automotive Aftermarket Diagnostics Robert Bosch GmbH 73207 Plochingen Germany

In this paper, the problem of simultaneously estimating the states and selected parameters of a diesel combustion engine air path is considered. Due to the high complexity of the nonlinear air path model, this problem is challenging, further complicated as decisive physical insight is available in the form of inequality constraints. We therefore provide a derivative-free estimation algorithm, combining constrained online optimization with an unscented Kalman filter covariance update formula. To keep generality, the algorithm is derived and examined for a general class of nonlinear constrained systems. Experimental results put to test, confirm the efficiency of the provided estimation algorithm.

关键词： State estimation parameter estimation constraints nonlinear systems diesel combustion engines air path control monitoring fault diagnosis

来源：评论

学校读者我要写书评

暂无评论

Output Regulation Problem and Solution for LTV Minimum Phase systems with Time-varying Exosystem

Output Regulation Problem and Solution for LTV Minimum Phase...

引用

SICE Annual Conference

作者： Hyungbo Shim Jaehwa Lee Jung-su Kim Juhoon Back Department of Electrical Engineering ASRI Seoul National University Seoul South Korea Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart Germany Department of Electrical and Electronic Engineering Imperial College London London UK

Output regulation problem is to design a dynamic feedback controller that rejects/follows the unknown disturbance/reference asymptotically assuming that the disturbance/reference is generated by a known model (called exosystem). Although the model is known, the disturbance/reference is still unknown because the initial condition of the exosystem is unknown. It has been studied very actively since the seminal work by Francis in 1977, and up to now, we have quite complete solution in the conventional sense. However, most results assume that the exosystem is time-invariant. Although nonlinear exosystem has also been considered, the time-varying exosystem has not been incorporated because of the Poisson stability required to the nonlinear exosystem. In this paper, we extend output regulation theory into the case of time-varying linear systems with time-varying linear exosystems. This is enabled by considering 'differential regulator equation' rather than the classical (algebraic) regulator equation. While the differential regulator equation was also employed by Zhang and Serrani in 2005, who solved the output regulation problem with the periodic exosystem, we use it for deriving an explicit solution of the class of minimum-phase systems having general time-varying exosystem. As an application, we solve the track following problem for an optical disc drive system whose spindle motor is accelerating or decelerating. This case leads to the disturbance having time-varying frequency, which turns into the time-varying exosystem. It seems that this result can be applied to robotics/mechatronic systems control

关键词： Time varying systems Regulators Differential algebraic equations Nonlinear equations Poisson equations Adaptive control Stability Linear systems Nonlinear optics Optical feedback

来源：评论

学校读者我要写书评

暂无评论

SCHEDULED OPTIMIZATION OF AN MMA POLYMERIZATION PROCESS

引用

IFAC Proceedings Volumes 2006年第2期39卷 939-944页

作者： R. Lepore A. Vande Wouwer M. Remy R. Findeisen Z. Nagy F. Allgöwer Laboratoire d'Automatique Faculté Polytechnique de Mons Boulevard Dolez 31 B-7000 Mons Belgium Institute for Systems Theory in Engineering University of Stuttgart Pfa enwaldring 9 D-70550 Stuttgart Germany Control Engineering Department University of Loughborough LE11 3TU Loughborough United Kingdom

In this study, attention is focused on the design of a scheduled-optimization strategy for a batch MMA polymerization process. The objective of this strategy is to track an optimal temperature, despite uncertainties in the heat transfer and the gel ***effect. This strategy makes use of an (uncertain) physical model and on-line temperature measurements. The uncertain parameters are re-estimated on line, so as the optimal temperature trajectory. The good decoupling (in time) between the two major disturbances allows good performance to be achieved.

关键词： Polymerization batch control process control optimization

来源：评论

学校读者我要写书评

暂无评论

Significance of Pacemaker vs. Non-Pacemaker Neurons in an Excitatory Rhythmic Network

Significance of Pacemaker vs. Non-Pacemaker Neurons in an Ex...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Liston K. Purvis Terrence M. Wright Jeffrey C. Smith Robert J. Butera Laboratory for Neuroengineering Georgia Institute of Technology Atlanta GA USA Department of Biology Emory University Atlanta GA USA Cellular and Systems Neurobiology Section Laboratory of Neural Control NINDS-National Institutes of Health Bethesda MD USA Laboratory for Neuroengineering and School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

This modeling study investigates the functional role of pacemaker neurons in generating stable rhythms in the pre-Botzinger complex, a subcircuit of the respiratory pattern-generating circuitry in mammals. While the presence of pacemakers within the network is without doubt, the percentage and significance of such pacemakers is still unresolved. Here we revisited earlier network simulations by varying the fraction of pacemaker and non-pacemaker neurons within the network, and quantifying the robustness of the input parameter space and range of frequencies output by the network. Stable network rhythms were possible even with no pacemakers. However, we found that a network of at least 50% pacemakers produced the greatest range of output frequencies and had the more robust input space

关键词： Pacemakers Neurons Frequency Rhythm Robustness Circuits Laboratories Neural engineering Cities and towns USA Councils

来源：评论

学校读者我要写书评

暂无评论

Announcements, comments, and acknowledgments

引用

AIAA Journal 2006年第1期44卷 1-10页

作者： Oran, Elaine Kailasanath, Kazhikathra Aggarwal, Suresh K. Ahmadian, Mehdi Alexandrov, Natalia Auweter-Kurtz, Monika Bailly, Christophe Balachandran, Balakumar Berman, Alex Candler, Graham V. Chelliah, Harsha K. Chokani, Ndaona Fujii, Kozo Gaitonde, Datta V. Ghia, Kirti Karman N. Givi, Peyman Gore, Jay P. Kaplan, Carolyn R. Livne, Eli Lucht, Robert P. Messac, Achille Wing, N.G. Palazotto, Anthony N. Pierre, Christophe Plotkin, Allen Roy, Ajit K. Saigal, Sunil Sforza, Pasquale M. Shivakumar, Kunigal N. So, Ronald M.C. Springer, Anthony M. Anatolitumin, Anthony M. Zhong, Xiaolin United States Division of Computational Physics United States United States AIAA United States APS United States National Academy of Engineering United States Center for Reactive Flow and Dynamical Systems Naval Research Laboratory United States Institute of Physics Department of Mechanical Engineering University of Illinois at Chicago United States ASME Combustion Institute Department of Mechanical Engineering Virginia Polytechnic Institute State University United States Aeronautics Systems Analysis Branch NASA Langley Research Center United States SIAM ISSMO Aerospace Engineering Institute of Space Systems Universität Stuttgart Germany Amelia Earhart Italy International Amelia Earhart Award Committee Italy France France Mechanical Engineering University of Maryland College Park United States AAM SPIE ASA ASME Technical Committees of Multi-Body Systems Nonlinear Dynamics Dynamics and Control of Structures and Systems American Helicopter Society United States Aerospace Engineering and Mechanics University of Minnesota United States AIAA Thermophysics Technical Committee Mechanical and Aerospace Engineering University of Virginia United States AIAA Propellants and Combustion Technical Committee AIAA's Transition Study Group Aerodynamics Measurement Technology Technical Committee Thermophysics Technical Committee Japan MOSAIC project on the Technology Pressure-sensitive Paint Measurement System Japan High-Speed Flows Group Air Vehicles Directorate Air Force Research Laboratory Wright-Patterson Air Force Base United States Wright State University United States Aerospace Engineering and Engineering Mechanics United States United States Mechanical Engineering University of Pittsburgh United States School of Mechanical Engineering Purdue University United States Committee on Heat Transfer in Fire and Combustion Systems Japan Board of Advisors Central States Section Combustion Institute United States AIChE United States Tau Beta Pi United States

No abstract available

关键词： institute of Space and Astronautical Science American Society of Mechanical Engineers Direct Numerical Simulation Aerospace engineering MDO Propellant Air Forces Aerodynamics Heterogeneous Combustion NASA Langley Research Center

来源：评论

学校读者我要写书评

暂无评论

Delay dependant H∞ control for neural systems with mixed delays

Advances in Modelling and Analysis C

引用

Advances in Modelling and Analysis C 2005年第5-6期60卷 13-23页

作者： Yang, Fan Zhang, Quing-Ling Institute of Systems Science Northeastern University Shenyang Liaoning 110 004 China Dept. of Mathematics Tonghua Teachers' College Tonghua Jilin 134 002 China Northeastern University Department of Control Theory and Control Engineering

A delay-dependent H∞ control problem for linear neutral systems with mixed delays is investigated. The purpose is to design a state-feedback control laws such that the closed-loop system is asymptotically stable and the H∞ norm of the closed-loop transfer function from the disturbance to the controlled output is not more than a prescribed upper bound. In terms of linear matrix inequality and taking a new Lyapunov-Krasovsii functional, a new sufficient condition which guarantees the asymptotical stability of the closed-loop system is given. Furthermore, one sufficient condition for the existence of a new delay-dependent H ∞ state -feedback controller is also shown. A numerical example is given to demonstrate that our new results are less conservative than existing results and effectiveness. Naturally, the results which we obtained are the extended of some results for existing linear delay system.

关键词： control theory

来源：评论

学校读者我要写书评

暂无评论

Analysis of different crystalliser configurations to perform preferential crystallisation

Analysis of different crystalliser configurations to perform...

引用

作者： Elsner, M.P. Muslera, E. Alonso Angelov, I. Fernaśndez Menéndez, D. Lorenz, H. Polenske, D. Vollmer, U. Raisch, J. Seidel-Morgenstern, A. Max Planck Institute for Dynamics of Complex Technical Systems Physical and Chemical Foundations of Process Engineering Sandtorstr. 1 39106 Magdeburg Germany Max Planck Institute for Dynamics of Complex Technical Systems Systems and Control Theory Group Sandtorstr. 1 39106 Magdeburg Germany Otto von Guericke University Department of Chemical Engineering Universitätsplatz 2 39106 Magdeburg Germany Otto von Guericke University Department of System Theory of Process Engineering PO Box 4120 39106 Magdeburg Germany

The intention of this paper is the analysis of general concepts for preferential crystallisation with the focus on aspects of quantification. In this preliminary examination, the amino acid threonine was used as a model system. The use of on-line polarimetry in combination with on-line densimetry as well as microscopic investigation enables to obtain some indispensable information about the crystallisation kinetics. Taking these estimated values into consideration a simplified mathematical description as a first approach including a population balance model was established for the simulation of the time changes of liquid phase composition during the preferential crystallisation process. Based on this simplified model different crystalliser configurations were investtigated.

关键词： Crystallization

来源：评论

学校读者我要写书评

暂无评论

The influence of feedback/feedforward control on relaxed pass profile controllability of discrete linear repetitive processes

The influence of feedback/feedforward control on relaxed pas...

引用

International Workshop on Multidimensional (nD) systems

作者： L. Hladowski K. Galkowski E. Rogers A. Kummert D.H. Owens Institute of Control and Computation Engineering University of Zielona Gora Zielona Gora Poland University of Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK Faculty of Electrical Information and Media Engineering Communication Theory University of Wuppertal Germany Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Repetitive processes are a distinct class of 2D systems (i.e. information propagation in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or 2D systems theory. Here we give the first results on how feedback/feedforward control action can be used to influence one form of controllability for processes with discrete dynamics.

关键词： Linear feedback control systems controllability Integrated circuit modeling control engineering computing Vectors Communication system control Computer science systems engineering and theory State-space methods Multidimensional systems

来源：评论

学校读者我要写书评

暂无评论

A Non-Dexterous Dual Arm Robot's Feasible Orientations Along Desired Trajectories: Analysis & Synthesis

A Non-Dexterous Dual Arm Robot's Feasible Orientations Along...

引用

IEEE Conference on Decision and control

作者： A. Banerji R.N. Banavar D. Venkatesh Division of Remote Handling & Robotics (DRHR) Bhabha Atomic Research Centre Mumbai India IIT Bombay Mumbai India Systems and Control Engineering Indian Institute of Technology Mumbai India Electronics & Control Section DRHR Bhabha Atomic Research Centre Mumbai India

A dual-arm robotic manipulator needs to maintain its end-effectors' orientations with reference to each other as defined by the task constraints at various locations. To give one example, the task of operating a pair of pliers by rigidly grasping its handles will require that the orientation of the two end-effectors with respect to each other should vary as a function of their respective locations. Due to the wrist joint range limitations, dexterity is very limited and it may not be possible to achieve a desired maneuver along a desired trajectory. We present here a systematic approach to judge the feasibility of such demands and a method to find other reasonable target trajectories or orientations. The approach here is based on simple geometry with little computation load.

关键词： Wrist Manipulators Remote handling Robot kinematics Trajectory Computational geometry Arm control engineering Electric variables control control systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：