Abstract
This paper concerns the design problem of discrete-time Gain-Scheduled Output Feedback (GSOF) controllers, in which inexact scheduling parameters are presupposed to be provided, for discrete-time Linear Parameter-Varying (LPV) systems. An iterative algorithm, which has already been proposed for the same problem with unstructured disturbance input and performance output, is revised to accommodate the structures of those signals by introducing constant scaling matrices for the reduction of conservatism. Flight controllers for the lateral-directional motions of an airplane are designed by using our method and a design method without consideration of the uncertainties in the provided scheduling parameters. Flight tests using the two controllers confirm that the GSOF controller with consideration of the uncertainties realized model-matching as well as disturbance suppression as assured in its design; however, the GSOF controller without consideration of the uncertainties could not achieve the assured control performance in its design.
