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Adaptive control based on special compensation methods for time-varying systems subject to bounded disturbances. (English) Zbl 0830.93040

Recently some compensation methods have been derived to preserve stability for time-varying systems that are subjected to bounded output disturbances and that have unmodelled dynamics. Using these techniques, an adaptive control scheme is developed that estimates plant parameters using a normalized algorithm with a dead zone. The scheme is notable in that no minimum phase requirement is invoked and in that the presence of externally persistently exiciting signals is unnecessary, due to a strategy that confers a self-excitation capability to the system. The performance of the scheme is demonstrated via simulation.

MSC:

93C40 Adaptive control/observation systems
93C99 Model systems in control theory
93D21 Adaptive or robust stabilization
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