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2013 NASA/ESA Conference on Adaptive Hardware and systems, AHS 2013

作者： Muñoz, Daniel M. Llanos, Carlos H. Dos Santos Coelho, Leandro Ayala-Rincón, Mauricio Electronics Engineering Graduate Program Faculty of Gama University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering Automation and Control Group/GRACO University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGEPS Pontifical Catholic University of Parana Curitiba Parana Brazil Departments of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9781467363839

The firefly algorithm (FA) is a new population-based metaheuristic bioinspired on the behavior of the flashing characteristics of fireflies. As a population-based algorithm, the FA suffers from large execution times specifically for embedded optimization problems with computational limitations. For reducing execution times we propose a hardware parallel architecture of the FA algorithm that facilitates the implementation in Field Programmable Gate Arrays (FPGAs). In addition, this work proposes the application of the opposition-based learning (OBL) approach to the FA algorithm. The respective hardware implementation (HPOFA) was mapped into a Virtex5 FPGA device and numerical experiments using four well-known benchmark problems demonstrate that the opposition-based approach allows the FA algorithm to improve its functionality, preserving the swarm diversity and avoiding the premature convergence problem. Synthesis results point out that the HPOFA architecture is effectively mapped in hardware and is suitable for embedded applications. © 2013 IEEE.

关键词： Parallel architectures

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Admissible modeling disturbances for the control of a road sector

Admissible modeling disturbances for the control of a road s...

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7th IEEE International Symposium on Applied Computational Intelligence and Informatics, SACI 2012

作者： Dimon, Catalin Popescu, Dumitru Department of Automatic Control and Systems Engineering Faculty of Automatics and Computer Science University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9781467310116

Usually when modeling a real process the effects of nonlinearities must be taken into account. A road traffic sector is one such process. Considering it from a macroscopic point of view, the sector is modeled both as a nonlinear and as a linearized process. An I/O model is proposed and a RST control algorithm is used to ensure the imposed performances for the closed loop system. The robustness of the system is obtained by determining the modulus margin and based upon it the admissible nonlinearities are analyzed in order to determine the limits between which the system maintains its stability. ©2012 IEEE.

关键词： Closed loop systems

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Multivariable PID controllers for dynamic process

Multivariable PID controllers for dynamic process

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Asian control Conference

作者： M.C. Razali N. A. Wahab P. Balaguer M. F. Rahmat S. I. Samsudin Department of Control and Mechatronics Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Malaysia Department of Industrial Systems and Design Universitat Jaume I de Castello Spain Department of Industrial Electronic Faculty of Electronics and Computer Engineering Universiti Teknikal Malaysia Melaka Durian Tunggal Malaysia

ISBN: (纸本)9781467357661

This paper is concerned with the design of a dynamic multivariable PID control for multi input multi output (MIMO) process. Four multivariable PID control schemes using Davison, Penttinen-Koivo, Maciejowski and a combined method were applied. The controller parameters for all control strategies were designed based on dynamic condition using singularly perturbed system. The purpose of the study is to investigate the effectiveness in the performance of dynamic control based on different multivariable PID control strategies. To attain the best result, numerous tuning parameters were tested. The simulation results show the significance of the study whereby the proposed dynamic MPID control scheme shows better improvement in control tuning of nonlinear system.

关键词： Process control Substrates Tuning PD control MIMO Wastewater treatment

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Iterative learning control in health care: Electrical stimulation and robotic-assisted upper-limb stroke rehabilitation

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IEEE control systems 2012年第1期32卷 18-43页

作者： Freeman, Chris T. Rogers, Eric Hughes, Ann-Marie Burridge, Jane H. Meadmore, Katie L. School of Electronics and Computer Science University of Southampton United Kingdom School of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom Department of Control Systems Theory and Design School of Electronics and Computer Science University of Southampton United Kingdom Faculty of Health Sciences University of Southampton United Kingdom

Research into conventional therapy and motor learning theory provides evidence that the intensity of practice of a task and feedback are important for iterative control of health care. Iterative learning control (ILC) is one model-based approach to stroke rehabilitation that has progressed to a program of clinical trials, which constitute the first major stage towards the eventual transfer into practice. ILC exploits the repeating nature of the patients' tasks to improve performance by learning from past experience as compared with other approaches employed to control FES. ILC is able to respond to physiological changes in the system, such as spasticity and the presence of a patient's voluntary effort by updating the control input using data collected over previous attempts at the task. ILC can also closely regulate the amount of stimulation supplied, ensuring that minimum assistance is provided, promoting the patient's maximum voluntary contribution to the task completion.

关键词： Health care

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Admissible modeling disturbances for the control of a road sector

Admissible modeling disturbances for the control of a road s...

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International Symposium on Applied Computational Intelligence and Informatics ( SACI)

作者： Catalin Dimon Dumitru Popescu Department of Automatic Control and Systems Engineering Faculty of Automatics and Computer Science University Politehnica of Bucharest Bucharest Romania

Usually when modeling a real process the effects of nonlinearities must be taken into account. A road traffic sector is one such process. Considering it from a macroscopic point of view, the sector is modeled both as a nonlinear and as a linearized process. An 110 model is proposed and a RST control algorithm is used to ensure the imposed performances for the closed loop system. The robustness of the system is obtained by determining the modulus margin and based upon it the admissible nonlinearities are analyzed in order to determine the limits between which the system maintains its stability.

关键词： Analytical models Robustness

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Editorial

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International Journal of Bio-Inspired Computation 2013年第4期5卷 197-198页

作者： Camacho, David Badica, Costin Bein, Doina Warnier, Martijn Computer Science Department Escuela Politecnica Superior Universidad Autonoma de Madrid C/Francisco Tomás y Valiente 28049 Madrid Spain Software Engineering Department Faculty of Automatics Computers and Electronics University of Craiova Bvd. Decebal 107 200440 Craiova Romania Applied Research Laboratory Information Science and Technology Division Pennsylvania State University 204 V Applied Science Building University Park PA 16802 United States Systems Engineering Section Faculty of Technology Policy and Management Delft University of Technology Jaffalaan 5 2628BX Delft Netherlands

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Sensitivity analysis of time delay parabolic-hyperbolic optimal control problems

Sensitivity analysis of time delay parabolic-hyperbolic opti...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Zbigniew Emirsajłow Anna Krakowiak Adam Kowalewski Jan Sokołowski Institute of Control Engineering West Pomeranian University of Technology Szczecin Poland Institute of Mathematics Technical University Cracow Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Institute of Automatics AGH University of Science and Technology Cracow Poland Systems Research Institute Polish Academy of Sciences Warszawa Poland Institut Elie Cartan Laboratoire de Mathématiques Université Henri Poincaré Vandoeuvre-les-Nancy France

In the paper the first order sensitivity analysis is performed for a class of optimal control problems for time delay parabolic-hyperbolic equations. A singular perturbation of geometrical domain of integration is introduced in the form of a circular hole. The Steklov-Poincaré operator on a circle is defined in order to reduce the problem to regular perturbations in the truncated domain. The optimality system is differentiated with respect to the small parameter and the directional derivative of the optimal control is obtained as a solution to an auxiliary optimal control problem.

关键词： Optimal control Equations Delay effects Sensitivity analysis Boundary conditions Educational institutions Electronic mail

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Experimental verification of constrained iterative learning control using successive projection

Experimental verification of constrained iterative learning ...

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UKACC International Conference on control (control)

作者： Bing Chu Zhonglun Cai David H Owens Eric Rogers Chris T Freeman Paul L Lewin Electronics and Computer Science University of Southampton Southampton UK Faculty of Engineering and the Environment University of Southampton Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK Italian Institute of Technology Genoa Italy

In many practical applications, constraints are often present on, for example, the magnitudes of the control inputs. Recently, based on a novel successive projection framework, two constrained iterative learning control (ILC) algorithms were developed with different convergence properties and computational requirements. This paper investigates the effectiveness of these two methods experimentally on a gantry robot facility, which has been extensively used to test a wide range of linear model based ILC algorithms. The results obtained demonstrate the effectiveness of the algorithms in solving one form of the general constrained ILC problem.

关键词： Convergence Robots Algorithm design and analysis Prediction algorithms Trajectory Optimization

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Experimental verification of constrained iterative learning control using successive projection

Experimental verification of constrained iterative learning ...

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2012 UKACC International Conference on control, control 2012

作者： Chu, Bing Cai, Zhonglun Owens, David H. Rogers, Eric Freeman, Chris T. Lewin, Paul L. Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom Faculty of Engineering and the Environment University of Southampton Southampton SO17 1BJ United Kingdom Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD United Kingdom Italian Institute of Technology Via Morego 30 16163-Genova Italy

ISBN: (纸本)9781467315609

关键词： Iterative methods

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Safety zones based Robustly Feasible Model Predictive control for nonlinear network systems

Safety zones based Robustly Feasible Model Predictive Contro...

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作者： Brdys, Mietek A. Tran, Vu Nam Kurek, Wojtek Depeartment of Electronics Electrical and Computer Engineering University of Birmingham Edgbaston Birmingham B15 2TT United Kingdom Department of Control Systems Engineering Faculty of Electrical and Control Engineering Gdansk University of Technology ul. Narutowicza 11/12 80 233 Gdansk Poland

ISBN: (纸本)9783902661937

The paper considers design of Robustly Feasible Model Predictive controller which achieves recursive robust feasibility of the generated control actions when applied to nonlinear network systems with state constraint under bounded disturbances. The optimizing control algorithm with safety zones modifying the model based state constraints is derived to achieve recursive robust feasibility. Its performance is illustrated by application to optimizing control of hydraulics in Drinking Water Distribution System example. Copyright © 2011 IFAC.

关键词： Complex networks

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