电传系统的相位补偿

研究了某电传系统飞行包线内一簇频率特性曲线的增益和相位穿越频率带,推导了具有任意两对零、极点分布的滞后－超前校正网络的８个特征公式,建立了频率特性曲线簇幅、相穿越频率带与校正网络拐角频率的补偿关系,提出了频率持性曲线簇的补偿方法。一次设计成功覆盖全部飞行条件的二阶校正网络的４个固定参数,使系统增益和相位储备全部满足军标要求,操纵品质也得到了改善,等效拟配延时平均减小０．０５ｓ。地面试验和空中试飞验证了本文提出的相位补偿方法。

PHASE COMPENSATION FOR FBW SYSTEM

The gain crossover frequency band and phase crossover frequency bands of a set of frequency response curves in the whole flight envelope for a fly-by-wire system have been stud-ied in this paper.Eight characteristic formulas for lag-lead correctiVe network with any two pairs poles and zeros distributions have been derived.The compensative relationships between the gain and phase crossover frequency bands of the frequency curves and the corner frequencies of the corrective network were established. A compensation method for a set of open-loop fre-quency characteristic curves has been proposed. Four fixed parameters of two-order corrective network which covers all conditions in the whole enveIope are. designed at a time by using this method,so that alI the gain and phase margins of the FBW system completely satisfy the mili-tary specification requirements, and the handling quality has been also improved.The equiva-lent time delay has been reduced by 0.05 second on an average.The phase compensation method proposed in this paper has been demonstrated by the ground tests and the flight tests.