The problem of gain adjustment in an existing control law is cast into the framework of modern control theory, which results in a real-diagonal block structure of gains to be adjusted. The desire to recover performance in the form of input-output properties, as well as handling qualities, is introduced as a mixed cost functional. LMI-based solutions for H∞and H2based optimization are discussed, as well as a Quasi-Newton approach. The handling qualities of the F/A-18 HARV during refueling serves as a motivating example for the method. Five gains in the existing flight control system are adjusted to recover the performance and handling qualities of the standard F/A-18.
|Original language||English (US)|
|Title of host publication||1997 Guidance, Navigation, and Control Conference|
|Publisher||American Institute of Aeronautics and Astronautics Inc, AIAA|
|Number of pages||11|
|State||Published - Jan 1 1997|