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International Conference on Computational Science and engineering

作者： Gao, X.Z. Wu, Ying Zenger, Kai Huang, Xianlin Department of Electrical Engineering Aalto University FI-00076 Espoo Finland Department of Automation and Systems Technology Aalto University FI-00076 Espoo Finland Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9780769543239

The Artificial Fish-swarm Algorithm (AFA) is an intelligent population-based optimization algorithm inspired by the behaviors of fish swarm. Unfortunately, it sometimes fails to maintain an appropriate balance between exploration and exploitation, and has a drawback of blind search. In this paper, a novel cultured AFA with the crossover operator, namely CAFAC, is proposed to enhance its optimization performance. The crossover operator utilized is to promote the diversification of the artificial fish and make them inherit their parents' characteristics. The Culture Algorithms (CA) is also combined with the AFA so that the blind search can be combated with. A total of 10 high-dimension and multi-peak functions are employed to investigate the optimization property of our CAFAC. Numerical simulation results demonstrate that the proposed CAFAC can indeed outperform the original AFA. © 2010 IEEE.

关键词： Knowledge based systems

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A Model-free Periodic Adaptive control for Freeway Traffic Density via Ramp Metering

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自动化学报 2010年第7期36卷 1029-1032页

作者： CHI Rong-Hu HOU Zhong-Sheng School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingdao 266042 P.R.China Advanced Control Systems Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 P.R.China

In this paper, a novel model-free periodic adaptive ramp metering scheme is presented for a freeway traffic system, which can be formulated as a general MIMO nonlinear system. The proposed method is model-free in nature, and the control inputs and the pseudo Jacobi parameters are updated periodically in a pointwise manner over the entire period, by directly using the I/O data obtained in the preceding periods. The geometrical tracking performance is shown with rigorous analysis. The simulation results illustrate the validity of the proposed method.

关键词：交通系统自适应匝道自动化系统交通管理

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A distributed control approach to robust output regulation of networked linear systems

A distributed control approach to robust output regulation o...

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2010 8th IEEE International Conference on control and automation, ICCA 2010

作者： Wang, Xiaoli Hong, Yiguang Jie, Huang Jiang, Zhong-Ping Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Dept. of Mechanical and Automation Engineering Chinese University of Hong Kong Hong Kong Hong Kong Dept. of Electrical and Computer Engineering Polytechnic Institute of New York University Brooklyn NY 11201 United States

ISBN: (纸本)9781424451951

In this paper, the robust output regulation problem of a networked linear system with uncertainties is considered. Based on internal model, distributed control scheme is adopted to achieve the objectives of asymptotic tracking and disturbance rejection in a networked uncertain system where both the reference inputs and disturbances are generated by an exosystem. Both state and output feedback designs are given. © 2010 IEEE.

关键词： Linear systems

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Local stability analysis of feedback linearizing schemes for a class of uncertain nonlinear systems

Local stability analysis of feedback linearizing schemes for...

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作者： Rohr, E.R. Pereira, L.F.A. Coutinho, D.F. School of Electrical Engineering and Computer Science University of Newcastle University Drive Callaghan NSW 2308 Australia Electrical Engineering Department Universidade Federal do Rio Grande do Sul Av. Osvaldo Aranha 103 Porto Alegre - RS Brazil Group of Automation and Control Systems PUCRS Av. Ipiranga 6681 90619-900 Porto Alegre Brazil

ISBN: (纸本)9783902661807

This work presents a (numerical) technique to the local stability analysis of feedback linearizing control schemes for a class of uncertain nonlinear systems. A nonlinear decomposition of vector functions is applied to transform the Lyapunov stability conditions into a set of state- and parameter-dependent LMI (linear matrix inequality) constraints, which are numerically solved in a finite set of points. The proposed method can deal with a large class of nonlinear systems as well as very complex Lyapunov function candidates. In addition, a maximized level set of the Lyapunov function is proposed as an estimate of the system stability region. © 2010 IFAC.

关键词： Lyapunov functions

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Automatic estimation of light sleep level during short nap

Automatic estimation of light sleep level during short nap

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15th International Symposium on Artificial Life and Robotics, AROB '10

作者： Wang, Bei Sugi, Takenao Wang, Xingyu Shirakawa, Shuichiro Nakamura, Masatoshi Department of Automation East China University of Science and Techonology Shanghai China Department of Electrical and Electronic Engineering Saga University Saga Japan National Centre of Neurology and Psychiatry Tokyo Japan Research Institute of Systems Control Institute for Advanced Research and Education Saga University Saga Japan

ISBN: (纸本)9784990288044

Short nap is a good relaxation way when people feel sleepy and tired during the day time. An automatic light sleep level estimation technique was presented for short nap sleep evaluation. Parameters were extracted from the polysommnographic sleep record. Sleep stages of open eyes awake, close eyes awake, and stage 1 were determined automatically based on the conditional probability. The conditional probability indicated the possibility of occurrence of sleep stages during short nap. The light sleep level was estimated based on the continuous change of conditional probability of awake. The developed technique can be usable for comfortable short nap sleep control. © 2010 ISAROB.

关键词： Probability

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Asymptotic and L2 stability analysis for a class of nonlinear discrete-time control systems subject to actuator saturation

Asymptotic and L2 stability analysis for a class of nonlinea...

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作者： Oliveira, M.Z. Gomes Da Silva Jr., J.M. Coutinho, D.F. Department of Electrical Engineering UFRGS Av. Osvaldo Aranha 103 90035-190 Porto Alegre-RS Brazil Group of Automation and Control Systems FENG PUCRS Av. Ipiranga 6681 90619-900 Porto Alegre-RS Brazil

ISBN: (纸本)9781424474264

This paper addresses the stability characterization problem for a class of nonlinear discrete-time control systems subject to actuator saturation and energy bounded disturbance inputs. The considered class of systems covers all nonlinear discrete-time systems that can be modeled by rational difference equations. The results are based on a recursive algebraic representation of the nonlinear control system and a generalized sector bound condition to deal with the saturation effect. From these elements, LMI based conditions are proposed to analyze the asymptotic stability and both the L2 input-to-state and input-to-output stability properties. The proposed conditions are then incorporated into convex optimization problems to either maximize an ellipsoidal estimate of the region of attraction or a bound on the admissible L2 disturbances, and also to minimize a bound on the system L2-gain. © 2010 AACC.

关键词： Discrete time control systems

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Microcontroller-based engineering education innovation

Microcontroller-based engineering education innovation

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International Conference on Educational and Information Technology (ICEIT)

作者： Jianyun Ni Jing Luo Tianjin Key Laboratory of Control Theory & Applications in Complicated Systems School of Electrical Engineering Tianjin University of Technology Tianjin China College of Electrical Engineering and Automation Tianjin Professional University Tianjin China

ISBN: (纸本)9781424480333

The goal of innovative education in engineering field is to cultivate excellent engineering talents with high quality, innovative spirit, innovative ability and innovative quality. With the wide application of microcontroller technology, innovative education in engineering field based on microcontroller will be agility, convenience and effectively. In order to adapt to the needs of engineering education innovation, a novel engineering education innovation scheme by microcontroller technology has been proposed, including education of microcontroller course, experimental course in class, engineering practical extracurricular and science competition of college students. The proposed scheme combine curriculum with practice, by making full use of teaching and self-study advantages and bypassing spoon-speed disadvantages. By applying the scheme, engineering education innovation using microcontroller can be carried out with high efficiency, high quality, and individualization. College students will achieve innovative ability, practice ability and competition ability of employment by the scheme. Practice has demonstrated that the scheme is applicable.

关键词： Microcontrollers Physics Artificial neural networks Microcomputers Educational institutions

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Model-free periodic adaptive control for a class of SISO nonlinear discrete-time systems

Model-free periodic adaptive control for a class of SISO non...

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International Conference on control and automation (ICCA)

作者： Ronghu Chi Zhongsheng Hou School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingdao China Advanced Control Systems Laboratory Beijing Jiaotong University Beijing China

Using the known periodicity of the given trajectory, we develop a new dynamical linearization method by introducing a concept of PPD, then present a new model-free periodic adaptive control approach (MFPAC) and its extension of higher-order learning control algorithm for a class of general nonlinear and non-affine discrete-time systems. It is model-free in nature and the controller design and analysis only depends on the I/O data of the dynamical system. The proposed MFPAC updates the PPD estimate values and the control signals periodically in a pointwise manner using the I/O data obtained at the corresponding points in previous periods, in the sequel achieves an asymptotic tracking convergence. A simulation example illustrates the feasibility and effectiveness of the proposed method.

关键词： Adaptive control Time varying systems Uncertainty Automatic control Nonlinear control systems automation Convergence control theory control systems Trajectory

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Mobile manipulator tracking control based on observer design

Mobile manipulator tracking control based on observer design

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2010 8th World Congress on Intelligent control and automation, WCICA 2010

作者： Ren, Yuwei Wang, Hong Institute of Automation Chinese Academy of Science China Research Center of Automation Northeastern University Shenyang China Control Systems Centre School of Electrical and Electronic Engineering University of Manchester United Kingdom

ISBN: (纸本)9781424467129

This paper studies the tracking control problem of mobile manipulators based on state observer. The proposed tracking controller ensures that the full state of the system can asymptotically track the given desired trajectory globally in the presence of the system coupling. Extensive simulations presented in the paper show the effectiveness of the proposed approach. © 2010 IEEE.

关键词： Manipulators

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Multi-objective Minimum Entropy controller Design for Stochastic Processes

Multi-objective Minimum Entropy Controller Design for Stocha...

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American control Conference

作者： Puya Afshar Amin Nobakhti Hong Wang Tianyou Chai Control Systems Centre The University of Manchester Manchester UK Electrical Engineering Sharif University of Technology Tehran Iran Centre of Automation Northeastern University Shenyang China

ISBN: (纸本)9781424474264

Minimum variance control is an established method in control of systems corrupted by noise. In these cases, as it is not possible to directly control the actual value of the system variables, one aims to reduce the variations instead. However, when the system noises are non-Gaussian, this approach fails because non-Gaussian noise cannot be characterised by simple measures such as variance. In these cases, the Entropy is proposed as a generalisation of the variance measure and the control objective becomes that of minimising the Entropy. Previously a limited form of this problem has been solved using first order Newtonian methods. In this paper, the control objective is first expanded to also include an error term related to the closed loop tracking performance, and the combined problem is then solved using a fast global optimisation search algorithm. The effectiveness of the approach is demonstrated through a case study based on a first principle model of a nonlinear heat exchanger.

关键词： Minimum Entropy control non-Gaussian stochastic systems PI control Differential Evolutions

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