期刊
ISA TRANSACTIONS
卷 120, 期 -, 页码 89-98出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.isatra.2021.03.021
关键词
Hammerstein-Wiener system; Parameter estimation; Time delay; Particle swarm optimization algorithm
资金
- National Natural Science Foundation of China [61973176, 62073180]
- Jiangsu Natural Science Foundation, China [BK20181457]
- Six Talent Peak Projects in Jiangsu Province, China [XYDXX-038]
- Jiangsu Qinglan Project, China
This paper proposes a method for parameter estimation of Hammerstein-Wiener nonlinear systems with unknown time delay. The linear variable weight particle swarm method is used to transform the nonlinear system identification problem into a function optimization problem in the parameter space. By utilizing the parallel searching ability of particle swarm optimization and iterative identification technique, all parameters and the unknown time delay can be simultaneously estimated. The simulation results demonstrate the fast convergence speed and high estimation accuracy of the proposed method for H-W systems with unknown time delay, and its application in bed temperature system identification.
This paper deals with the parameter estimation of Hammerstein-Wiener (H-W) nonlinear systems which have unknown time delay. The linear variable weight particle swarm method is formulated for such time delay systems. This algorithm transforms the nonlinear system identification issue into a function optimization issue in the parameter space, then utilizes the parallel searching ability of the particle swarm optimization and the iterative identification technique to realize the simultaneous estimation of all parameters and the unknown time delay. Finally, parameters in the linear submodule, nonlinear submodule and the time delay are separated from the optimum parameter. Moreover, two illustrative examples are exhibited to evaluate the effectiveness of the proposed method. The simulation results demonstrate that the derived method has fast convergence speed and high estimation accuracy for estimating H-W systems with unknown time delay, and it is applied to the identification of the bed temperature systems. (C) 2021 ISA. Published by Elsevier Ltd. All rights reserved.
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