论文部分内容阅读
直升机载外挂振动信号是由空气动力引起的宽频随机信号和螺旋桨转动引起的较强的周期脉动信号组成,实测数据处理时需要对周期信号与随机信号进行分离。本文提出三种周期信号与随机信号的分离方法,并通过算例对这三种算法的准确度和适用性进行了分析,给出适用的周期信号与随机信号分离方法。
Helicopters contained external vibration signal is generated by the aerodynamic broadband random signal and the propeller rotation caused by a strong periodic pulse signal composition, the measured data processing cycle signals and random signals need to be separated. In this paper, three methods for separating periodic signals and random signals are proposed. The accuracy and applicability of these three algorithms are analyzed by examples. The suitable periodic signal and random signal separation methods are given.