一、概述振动是由发动机、机械运动件、飞行时外界压力变化和噪音等引起的,它通过各种构件的响应传到电子仪器上是一种有很宽的各种频率及振幅组成的随机振动.随着飞行器的发展,振动、冲击条件更加恶劣,因此对减振器件提出了更高的要求.目前飞行器中的仪器都要进行三个方向宽频带(10～2000赫芝)扫描振动试验,特别在较大的振幅和加速度下是很难通 I. Overview Vibration is caused by the engine, mechanical moving parts, external pressure changes during flight and noise, etc. It is transmitted through a variety of components of the electronic instrument is a wide variety of frequencies and amplitudes of random Vibration.With the development of the aircraft, the vibration and impact conditions are worse, so higher requirements are put forward for the vibration-damping devices.At present, the instruments in the aircraft must perform the scanning vibration test in wideband (10 ~ 2000 Hz) in three directions , Especially in the larger amplitude and acceleration is difficult to pass