摘要
Abstract
The vibration signal of helicopter external weapons is composed of broadband random signal derived from aerodynamic force and strong cyclic pulse signal derived from the running of propeller,and the two kinds of signals should be separated during the process of data measuring.This text puts forward three kinds of separation methods of cyclic signal and random signal,and analyses the accuracy and applicability of them through calculation examples.Then,it puts forward the suitable method for the separation of cyclic signal and random signal.关键词
直升机载外挂/周期振动/随机振动/自相关分析Key words
helicopter external weapons/cyclic vibration/random vibration/self-related analysis分类
军事科技
