Accession Number : ADA320146
Title : Control of Slowly Varying LPV Systems: An Application to Flight Control,
Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH
Personal Author(s) : Lee, Lawton H. ; Sullivan, Mark
PDF Url : ADA320146
Report Date : 1996
Pagination or Media Count : 9
Abstract : Recent results in parameter-dependent control of linear parameter-varying (LPV) systems are applied to the problem of designing gain-scheduled pitch rate controllers for the F-16 VISTA (Variable-Stability In-Flight Simulator Test Aircraft). These methods, based on parameter-dependent quadratic Lyapunov functions, take advantage of known a priori bounds on the parameters' rates of variation (the bounds may themselves be parameter-varying). The controller achieves an induced-L2-norm performance objective; Level 1 flying qualities are predicted. Suboptimal solutions are obtained by solving a convex optimization problem described by linear matrix inequalities (LMIs). Incorporation of D-K iteration with 'constant D-scales' provides robustness to time-varying uncertainty. Parameter-varying performance weights are used to shape the desired performance at different points in the design envelope.
Descriptors : *FLIGHT CONTROL SYSTEMS, UNCERTAINTY, OPTIMIZATION, PITCH(INCLINATION), RATES, TIME, VARIATIONS, SOLUTIONS(GENERAL), JET FIGHTERS.
Subject Categories : Flight Control and Instrumentation
Distribution Statement : APPROVED FOR PUBLIC RELEASE