Gain Scheduling for H-Infinity Controllers: A Flight Control Example

Abstract

A new approach to gain scheduling linear dynamic controllers is illustrated on a pitch-axis autopilot design problem. In this application the linear controllers are designed at distinct operating conditions by H-infinity methods. The gain scheduling procedure uses particular features of both the linear dynamic controllers and the controller configuration to remove so-called hidden coupling terms that can occur in scheduled controllers. Potential performance improvement is demonstrated by simulation in comparison to a naive gain scheduled controller that ignores the coupling terms. © 1993, IEEE. All rights reserved.