Title page for ETD etd-554502439741131


Type of Document Dissertation
Author Lekutai, Gaviphat
URN etd-554502439741131
Title Adaptive Self-Tuning Neuro Wavelet Network Controllers
Degree PhD
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Besieris, Ioannis M.
Hannsgen, Kenneth B.
Moose, Richard L.
Reed, Jeffrey Hugh
VanLandingham, Hugh F. Committee Chair
Keywords
  • none
Date of Defense 1997-03-31
Availability unrestricted
Abstract
Single layer feed forward neural networks with hidden nodes of adaptive wavelet functions (wavenets) have been successfully demonstrated to have potential in many applications. Yet applications in the process control area have not been investigated. In this paper an application to a self-tuning design method for an unknown nonlinear system is presented. Different types of frame wavelet functions are integrated for their simplicity, availability, and capability of constructing adaptive controllers. Infinite impulse response (IIR) recurrent structures are combined in cascade to the network to provide a double local structure resulting in improved speed of learning. In particular, neuro-based controllers assume a certain model structure to approximate the system dynamics of the "unknown" plant and generate the control signal. The capability of neuro-controllers to self-tuning of an unknown nonlinear plants is then illustrated through design examples. Simulation results demonstrate that the self-tuning design methods are directly applicable for a large class of nonlinear control systems.

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