摘要
许多严重的飞行事故都与由速率限制引起的 型PIO有关。针对如何预防PIO,首先介绍了自适应杆增益和软件限制环节的设计原理。然后以某带速率限制的电传飞机为例,运用同一理论,分析采用自适应杆增益和软件限制环节来改善速率限制的不利影响。仿真结果表明,自适应杆增益环节和软件限制环节都能抑制住PIO的发生,但两者组合加入抑制效果更好,飞行品质也能达到满意的程度。
Closed loop instability caused by excess phase lag induced by actuator rate limiting has been suspected in many aircraft departures from controlled flight and pilot induced oscillations. Adaptive stick-gain and software rate limit were developed to minimize the phase lag induced by rate limiting. Adaptive stick-gain was evaluated on the pilot command path and using a software rate limit with and without adaptive stick-gain before actuator rate limit. Simulation results showed they were useful in preventing PIO. However, adaptive stick-gain plus software rate limit combination resulted in more PIO protection than either of them.
出处
《飞行力学》
CSCD
2004年第3期17-20,共4页
Flight Dynamics
