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Performance of the new neural network based control structure and learning algorithm

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2 Author(s)
Kecman, V. ; Dept. of Mech. Eng., Auckland Univ., New Zealand ; Vlacic, L.

This paper presents a new neural network (NN) based adaptive backthrough control (ABC) scheme for both linear and nonlinear dynamic plants. A feedforward approach presented here falls into the direct design category. In its simplest form the implementation requires an estimation of the process parameters at any sample instant. Unlike the other feedforward NN based control schemes the ABC proposed comprises of one neural network only which simultaneously acts as both plant model (emulator) and the controller (inverse of the emulator). For linear plants, without noise, the resulting feedforward controller, providing that the order of the plant and plant model are equal, is a perfect adaptive poles-zeros canceller. In the case of nonlinear dynamic system, and for the monotonic nonlinearity, the proposed ABC control represents the nonlinear predictive controller. The ABC scheme is based on the discrete nonlinear (NARMAX) dynamic model. For such models and for monotonic nonlinearity, the calculation of the desired control signal is the result of the nonlinear optimization procedure with guaranteed convex search function and consequently with an unique solution

Published in:

Knowledge-Based Intelligent Electronic Systems, 1998. Proceedings KES '98. 1998 Second International Conference on  (Volume:1 )

Date of Conference:

21-23 Apr 1998