摘要
系统而完整地提出了处理变速机械弱时变响应信号的离散频谱多点平均幅值修正法的理论和方法 ,严格证明了该方法能精确地计算出平稳信号和频率微弱波动信号的幅值 ,能近似地计算出幅值和频率均微弱波动的信号的平均幅值 ,并应用这套理论成功地解释了频率微弱波动信号的幅值谱表现出较严重的“功率泄露”
In the paper, the theory and methodology of amplitude correction method using average of several points in discrete spectrum, which is suitable for analyzing the dynamic signals of rotating machinery with small varying speed, is proposed and systematically studied. It is demonstrated that with this method the accurate amplitude of the signal component with weakly fluctuate frequency, and the averaging amplitude of the signal component with small fluctuation in both frequency and amplitude can be achieved. The serious leakage effect in the amplitude spectrum of a time-dependent signal is also qualitatively explained by the proposed theory.
出处
《振动工程学报》
EI
CSCD
北大核心
2001年第1期47-52,共6页
Journal of Vibration Engineering
基金
国家"九五"攀登计划资助项目! (编号 :PD95 2 190 3
