Fixed-order dynamic compensation for a high-performance fighter aircraft

Abstract

This paper presents a robust fixed-order dynamic compensator design for a high-performance fighter aircraft. The compensator design methodology is based on an approximate loop transfer recovery technique. Full-state gains are first designed for the dual system, which is the equivalent of designing a full-order observer. Then the loop characteristics at the dual system input are approximated with' a compensator in controller canonical form. Finally, the optimal gains are implemented in the dual compensator to insure robustness and tracking performance at the plant output. The fixed-order dynamic compensator developed here is compared with a previously published full-order observer design.