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An output recurrent fuzzy neural network based iterative learning control for nonlinear systems

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3 Author(s)
Ying-Chung Wang ; Inst. of Inf. Sci., Acad. Sinica, Taipei ; Chiang-Ju Chien ; Der-Tsai Lee

In this paper, we present a design method for a discrete-time iterative learning control system by using output recurrent fuzzy neural network (ORFNN). Two ORFNNs are employed to design the control structure. One is used as an identifier called output recurrent fuzzy neural identifier (ORFNI) and the other used as a controller called output recurrent fuzzy neural controller (ORFNC). The ORFNI for identification of the unknown plant is introduced to provide the plant sensitivity which is then applied to the design of ORFNC. All the weights of ORFNI and ORFNC will be tuned during the control iteration and identification process respectively in order to achieve a desired learning performance. The adaptive laws for the weights of ORFNI and ORFNC and the analysis of learning performances are determined via a Lyapunov like analysis. It is shown that the identification error will asymptotically converge to zero and output tracking error will asymptotically converge to a residual set which depends on the initial resetting error.

Published in:

Fuzzy Systems, 2008. FUZZ-IEEE 2008. (IEEE World Congress on Computational Intelligence). IEEE International Conference on

Date of Conference:

1-6 June 2008