上反射镜稳定系统机械谐振的分析

摘要

Aiming at the problem of mechanical resonance in the mirror for 1/2 mechanical transmission process, put forward the mechanical resonant reduced or eliminated mechanical resonant method. Through the analysis of the reflector stable system control structure model, and deduced the transfer function and dynamic equation, combining the actual structure the reflector, analyzes mechanical resonant emergence mechanism, discussion on the resonance frequency and mechanical structure mirror stable servo system in a relationship, and taking certain type tank length mirror as example progress validate analysis. The results show that the system doesn't appear instability of the structure design of the phenomenon, should take reasonable design and the beginning of more advanced simulation, to suppress or eliminate mechanical resonant.%针对在上反射镜1/2机械传动过程中存在机械谐振的问题,提出抑制或消除机械谐振的方法.通过分析上反射镜稳定系统的控制结构模型,推导出其传递函数和动力学方程,结合上反射镜的实际结构,分析机械谐振产生的机理,讨论结构机械谐振频率与上反射镜稳定伺服系统带宽关系,并以某型号坦克车长镜为例进行验证分析,结果表明:整机系统没有出现失稳的现象,应在结构设计初期采取合理的设计及更先进的仿真,以抑制或消除机械谐振.