基于舵机速率限制的PIO探测与抑制技术研究  

Detection and suppression research of PIO induced by actuator rate limiting

作　　者：李富刚[1] 田福礼[2] 

机构地区：[1]中国飞行试验研究院飞行仿真实验室,陕西西安710089 [2]中国飞行试验研究院总工办,陕西西安710089

出　　处：《飞行力学》2013年第2期170-174,179,共6页Flight Dynamics

摘　　要：舵机速率限制是现代数字电传飞机发生PIO事件的最主要诱发因素之一。利用描述函数法分析了舵机速率限制诱发PIO的机理;通过滑动窗口傅立叶变化法提取了PIO的特征值,基于直接逻辑设计了在线PIO探测算法;分析了DS抑制器、陷波抑制器的工作原理。地面模拟器的仿真验证结果表明,所提出的PIO探测算法和主动抑制方法正确、可行,可为PIO飞行试验提供理论基础。Rate limiting is one of the major triggering factors of the PIOs encountered by modern digital FBW aircraft.The mechanism of PIO caused by rate limiting of the actuator is analyzed with the description function.PIO characteristic values are extracted via sliding window Fourier transform.Real-time PIO detection algorithm is designed based on direct logics.Operating principles of DS suppressor and trap suppressor are analyzed.The results of ground simulator indicate that the PIO detection and active suppression methods presented in the paper are correct and feasible,and can be serve as basic theory for PIO flight test.

关 键 词：PIO 舵机速率限制 Ⅱ类PIO PIO探测 PIO抑制 DS抑制器 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]