変動安定微係数を有する航空機のためのディジタル適応飛行制御系の設計

抄録

This paper presents a new control scheme for digital adaptive flight control systems, that satisfies C* criterion for aircraft which have continuously varying stability derivatives. A number of design methods for digital adaptive flight control systems have been reported based on the assumption that aircraft are linear time-invariant systems. But the equations of real aircraft motions have wide time-varying parameters in their flight envelopes. Only recently, new adaptive control system theories for the linear time-varying systems have been developed. By modifying the new theories, this paper presents a new parameter adjustment algorithm that can estimate the coefficents of powers of dynamic pressure, which are used to synthesize the input to aircraft instead of estimating the time-varying parameters. Computer simulations were performed on a jet fighter as a time-varying system by continuously changing flight conditions in the flight envelope. The results showed remarkable adaptability.