液压助力器稳定性分析

Stability Analysis of Hydrobooster

液压助力器的稳定性,是指它在工作中会不会产生持续不断的振动。对于已经使用的助力器,一般情况下当平衡工作状态受到破坏后,能够迅速地恢复到原来的平衡状态。如果液压助力器的稳定性变差,它就会产生低频自激振动使舵面发生持续抖动,直接会影响飞机操纵系统的使用寿命和工作可靠性。该文阐述了飞机舵面振动的物理过程,稳定性的判别方法以及稳定余量。

The stablity of hydrobooster means whether it would occur continual libration in work or not. Hydrobooster which has been used can come back to equilibrium when original working state is destroyed. But if stablity of hydrobooster become bad, self-excited vibration in low frequency produced by hydrobooster can make movable surface occuring durative dithering, which direct influences useful life and operating reliability of airplane control system. Physical course of movable surface occuring durative dithering, cognizance method of stablity and stablity allowance were expounded in this paper.