Parameter Identification of Chaotic Dynamic Systems through an Improved Particle Swarm Optimization

Abstract

This paper is concerned with the parameter identification problem for chaotic dynamic systems. An improved particle swarm optimization (IPSO), which is a novel evolutionary computation technique, is proposed to solve this problem. The feasibility of this approach is demonstrated through identifying the parameters of Lorenz chaotic system. The performance of the proposed IPSO is compared with the genetic algorithm (GA) and standard particle swarm optimization (SPSO) in terms of parameter accuracy and computational time. It is illustrated in simulations that the proposed IPSO is more successful than the SPSO and GA. IPSO is also improved to detect and determine the variation of parameters. In this case, a sentry particle is introduced to detect any changes in system parameters and if any change is detected, IPSO runs to find new optimal parameters. Hence, the proposed algorithm is a promising particle swarm optimization algorithm for system identification.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Chaotic Dynamic Systems; Computational Time; Evolutionary Computation Techniques; Improved Particle Swarm Optimization; Lorenz Chaotic System; Optimal Parameter; Parameter Identification; Parameter Identification Problems; Particle Swarm Optimization Algorithm; Sentry Particles; System Identifications; Variation of Parameters; Chaotic Systems; Dynamic Programming; Genetic Algorithms; Parameter Estimation; Reactive Power; Particle Swarm Optimization (PSO); Particle Swarm Optimization

International Standard Serial Number (ISSN)

0957-4174

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Elsevier, All rights reserved.

Publication Date

01 May 2010

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