Abstract
Novel simple adaptive control algorithms for a non-ASPR plant are proposed without using an ordinary parallel feedforward controller. The proposed schemes consist of three basic procedures: decomposition of the non-ASPR plant into an unknown ASPR subsystem and a known stable subsystem, determination of a virtual control input to the ASPR subsystem based on the simple adaptive control, calculation of the actual control input through a design of H∞ control for the known subsystem for tracking the virtual control input. An extension to a discrete-time algorithm is also investigated. Furthermore, a new alternative approach without using a normalizing signal is also proposed. The advantage of these new approaches needs no prior knowledge on the unknown non-ASPR plant.
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