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5th International Conference on control and automation, ICCA'05

作者： Zhu, Xuemei Wang, Shuqing Li, Pu Wozny, Günter College of Electrical and Automation Engineering Nanjing Normal University Nanjing 210042 China Institute of Advanced Process Control Zhejiang University Hangzhou 310027 China Institute of Process and Plant Technology Technical University of Berlin KWT9 10623 Berlin Germany

ISBN: (纸本)0780391381

The estimation of time-variant parameters in nonlinear models remains as an open problem. In this work, we propose a new approach to addressing this problem by tuning weighting factors in the least-squares dynamic optimization. Through analysis of the solution procedure of the resulting optimization problem, it is found that parameter estimation with a weighted least-squares method is equivalent to a multi-variable closed-loop control system. The weighting factors in the objective function are equivalent to the controller parameters. Like any control system synthesis, the tuning can be made based on the output-input sensitivity analysis. The effectiveness of the approach is illustrated by estimating tray efficiencies and feed composition of a heat-integrated distillation column system. © 2005 IEEE.

关键词： Parameter estimation

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Performance characterization of IP network-based control methodologies for DC motor applications - Part I

Performance characterization of IP network-based control met...

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IECON 2005: 31st Annual Conference of IEEE Industrial Electronics Society

作者： Richards, Tyler Chow, Mo-Yuen Advanced Diagnosis Automation and Control Lab. Department of Electrical and Computer Engineering North Carolina State University Raleigh NC 27695 United States

ISBN: (纸本)0780392523

Using a communication network, such as an IP network, in the control loop is increasingly becoming the norm. This process of network-based control (NBC) has a potentially profound impact in areas such as: teleoperation, healthcare, military applications, and manufacturing. However, limitations arise as the communication network introduces delay that often degrades or destabilizes the control system. Four methods have been investigated that alleviate the IP network delays to provide stable real-time control. This paper presents the four methodologies, while the companion paper presents a case study on a DC motor with a networked proportional-integral (PI) speed controller with various network delays and noise levels. The four methodologies are gain scheduling middleware (GSM), optimal stochastic methodology, queuing methodology, and robust control methodology. Simulation results show that NBC combined with these techniques can successfully maintain system stability, allowing control of real-time applications. ©2005 IEEE.

关键词： control systems

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Design and Implementation of Fuzzy Supervisory PI controllers Using Fuzzy c-Means Clustering Combined with Fuzzy Gain Scheduling for a Binary Distillation Column

Design and Implementation of Fuzzy Supervisory PI Controller...

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IEEE Region 10 International Conference TENCON

作者： Kannawat Somsung Suvalai Pratishthananda Department of Process Control & Automation Nakornthai Strip Mill Public Limited Company Thailand Department of Electrical Engineering Faculty of Engineering Chulalongkom University Bangkok Thailand

In this paper, fuzzy supervisory PI controllers are developed and implemented on a pilot plant binary distillation column. Fuzzy c-means clustering technique is used in selecting membership functions and fuzzy rules are determined using fuzzy gain scheduling technique. Thus, the need of heuristic method for designing fuzzy membership functions and rules from expert knowledge is omitted. Then, the fuzzy supervisors adapt the parameters of the PI controllers on line. The task of the controllers is to perform dual composition control of the top and bottom products when the disturbances enter the column in the form of changes in feed flow rate. The results show that the fuzzy supervisory PI controllers achieve much better performance than the fixed PI controllers.

关键词： Fuzzy control Distillation equipment Temperature control Job shop scheduling Feeds Industrial control process control Fuzzy systems Chemical industry Supervisory control

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Real-Time control of a Binary Distillation Column Using HGA Fuzzy Supervisory PI controllers

Real-Time Control of a Binary Distillation Column Using HGA ...

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IEEE Region 10 International Conference TENCON

作者： Kiatkajohn Worapradya Suvalai Pratishthananda Department of Process Control & Automation Nakornthai Strip Mill Public Limited Company Thailand Department of Electrical Engineering Faculty of Engineering Chulalongkom University Bangkok Thailand

In this paper, an optimum fuzzy supervisory PI controller using hierarchical genetic algorithms is developed and implemented for controlling the top and bottom product quality of a nonlinear, multi-input multi-output binary distillation column when the disturbance enters the column in the form of the changes in feed flow rate. Two conventional PI controllers, one for the bottom product composition and another for the top product composition, are used together in the control scheme. Hierarchical genetic algorithms are used to derive the optimal number and shape of membership functions and fuzzy rules of a fuzzy supervisory system that adapts the parameters of the PI controllers. The real-time implementation results show the effectiveness of the proposed method.

关键词： Distillation equipment Fuzzy control Feeds Shape control control systems Fuzzy sets Genetic algorithms Fuzzy systems Optimal control MIMO

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Automobile lane detection System-on-Chip integrated with mixed signal mode CMOS image sensor

Automobile lane detection System-on-Chip integrated with mix...

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9th International Symposium on Consumer Electronics 2005, ISCE 2005

作者： Hsiao, Pei-Yung Cheng, Hsien-Chein Yeh, Chun-Wei Huang, Shih-Shinh Fu, Li-Chen IEEE Department of Electronic Engineering Chang Gung University Tao-Yuan Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Genesyslogic Co. Ltd. Circuit Layout Department Dept. of Electronic Engineering and Information Management Chang Gung University Department of Electrical Engineering Department of Computer Science and Information Engineering National Taiwan University Robotics and Automation Society Automatic Control Society Chinese Automatic Control Society Chinese Institute of Automation Engineers

In this paper, we aim at developing a System-on-Chip, SoC, which can capture image as well as produce vehicle lane map at the same time. We adopt Peak-Finding based lane detection algorithm that can achieve high recognition rate about 96% even under various weather conditions. The features of the proposed SoC are a single low-cost and compact chip which implements the lane detection algorithm with mixed signal mode CMOS image sensor. Therefore, it can be easily used in thousands of consumer electronics for intelligent automobile applications. © IEEE.

关键词： Image sensors

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Intelligent control of biped robot with heterogeneous legs

Intelligent control of biped robot with heterogeneous legs

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作者： Wang, Binrui Xu, Xinhe Tan, Jindong Key Laboratory of Process Industry Automation Institute of AI and Robotics Northeastern University Shenyang 110004 China Department of Electrical and Computer Engineering Michigan Technological University Houghton MI 49931 United States

ISBN: (纸本)008045108X

Intelligent bionic leg (IBL) is important for above-knee amputees. Biped robot with heterogeneous legs (BRHL) including artificial leg and bionic leg is proposed as a good test-bed for IBL. Mechanism and virtual prototype of BRHL is designed and built. Model of BRHL is established. Based on the complex differential algebraic equation of bionic leg, computed torque and PD feedback control of joint angle are introduced for gait tracking. The iterative learning control is applied in conjunction with computed torque and PD control law for good tracking performance. control simulation is done and shows intelligent control is good for BRHL. Copyright © 2005 IFAC.

关键词： Differential equations

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AN APPROACH FOR DESIGNING REAL-TIME EMBEDDED SYSTEMS FROM RT-UML SPECIFICATIONS

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IFAC Proceedings Volumes 2005年第1期38卷 117-122页

作者： M.A. Wehrmeister L.B. Becker C.E. Pereira Computer Science Institute UFRGS Brazil Automation and Control Systems Department UFSC Brazil Electrical Engineering Department UFRGS Brazil

The current work presents an API based on the Real-Time Specification for Java (RTSJ) that optimizes real-time embedded systems development. Using this API it is possible to state non-functional specifications, like time constraints, and guarantee its implementation in the selected platform. Moreover, it discusses how real-time requirements derived from the RT-UML standard can be mapped to the elements from the proposed API. An integrated toolset is used to support the intermediate steps of this mapping process. The paper illustrates the mapping mechanism by means of a case study that implements the control system of an automated wheelchair.

关键词： embedded systems design real-time programming support

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MULTI-MODEL control OF A SIMULATED PH NEUTRALIZATION process

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IFAC Proceedings Volumes 2005年第1期38卷 591-596页

作者： Jari M. Böling Dale E. Seborg João P. Hespanha Process Control Laboratory Åbo Akademi University Finland Department of Chemical Engineering University of California Santa Barbara Department of Electrical and Computer Engineering University of California Santa Barbara

A multi-model PID controller is developed and evaluated in a simulation study for a nonlinear pH neutralization process. The performance and robustness characteristics of the multi-model controller are compared to tho... 详细信息

关键词： Adaptive control switching control multiple models PID control

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On computing determinants of large Sylvester type matrices

On computing determinants of large Sylvester type matrices

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作者： Kujan, Petr Hromčík, Martin Šebek, Michael Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nam. 13 12135 Prague 2 Czech Republic Centre for Applied Cybernetics Institute of Information Theory and Automation Czech Republic Institute of Information Theory and Automation Pod vodarenskou vezi 4 18208 Praha 8 Czech Republic

ISBN: (纸本)008045108X

This work is devoted to computation of large n-D polynomial determinants with a special structure. Applications involve n-D systems theory (e.g. coprimeness test for two n-D polynomials or the theory of algebraic equations. More specifically, these determinants were exploited in (Chiasson et al., 2003b;Chiasson et al., 2003a) to solve the practical problem of multilevel converter by a special computational procedure. To tackle the concerned problem it is essential to solve a system of polynomial equations with many unknowns. An algorithm was chosen based on elimination theory using resultants leading to the fundamental problem of computing determinants of large Sylvester type matrices with n-D polynomial entries. The aim of this work is to propose and test new numerical algorithms that would make it possible to solve the concerned problems more effectively. Copyright © 2005 IFAC.

关键词： Fast Fourier transforms

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Real-time control of a binary distillation column using HGA fuzzy supervisory PI controllers

Real-time control of a binary distillation column using HGA ...

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IEEE Conference on control Technology and Applications (CCTA)

作者： K. Worapradya S. Pratishthananda Department of Process Control & Automation Chonburi Industrial Estate Nakornthai Strip Mill Public Limited Company Thailand Department of Electrical Engineering Chulalongkom University Bangkok Thailand

In this paper, a HGA fuzzy supervisory PI controller using hierarchical genetic algorithms is developed and implemented for controlling the top and bottom product quality of a nonlinear, multi-input multi-output binary distillation column when the disturbances enter the column in the form of the changes in feed flow rate. Two conventional PI controllers, one for the bottom product composition and another for the top product composition, are used together in a decentralized control scheme to per form dual composition control. Hierarchical genetic algorithms are used to derive the optimal number and shape of membership functions and fuzzy rules of a fuzzy supervisory system that adapts the parameters of the PI controllers. The real-time implementation results show the effectiveness of the proposed method

关键词： Distillation equipment Fuzzy control Feeds Genetic algorithms Temperature control Distributed control Shape control Fuzzy systems control systems process control

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