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