摘要
针对正弦加随机振动试验中低频正弦信号控制精度不高的难题,提出以多分辨谱分析方法为基础,结合维纳-辛钦定理,从频域获取正弦信号的幅值,从而实现正弦响应信号与随机响应信号的准确分离,提高了低频正弦信号的控制精度。经过仿真试验对比,该算法获得了很好的控制效果,解决了低频控制精度差的问题。
Poor control precision problem at low frequency in Sine on Random vibration test was pointed out and remained unsettled for many years. A new algorithm based on multirate spectrum estimation and Wiener-Khinchin theorem was introduced to solve the problem. This method can clearly separate the sine vibration signal from the wide band vibration signals in frequency domain. It provides a satisactory solution to the problem. Good results are obtained by tests.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2005年第15期1335-1338,1362,共5页
China Mechanical Engineering
关键词
振动试验
多分辨率谱估计
正弦加随机
随机振动试验
vibration test
multirate spectrum estimation
sine on random
random vibration test
