LPV model identification for gain scheduling control: an application to rotating stall and surge control problem

Abstract

We approach the problem of identifying a nonlinear plant by parameterizing its dynamics as a linear parameter varying (LPV) model. The system under consideration is the Moore-Greitzer model which captures surge and stall phenomena in compressors. The control task is formulated as a problem of output regulation at various set points (stable and unstable) of the system under inputs and states constraints. We assume that inputs, outputs and scheduling parameters are measurable. It is worth pointing out that the adopted technique allows for identification of an LPV model''s coefficients without the requirements of slow variations amongst set points. An example of combined identification, feedback control design and subsequent validation is presented.