摘要
Vold-Kalman滤波阶次跟踪分析技术以其能够在时域中提取阶次分量,同时避免了传统计算阶次分析的重采样和时、阶次域变换带来的误差等优点,已经成为了一种重要的非平稳状态下旋转机械的故障诊断方法。滤波带宽作为Vold-Kalman滤波阶次跟踪分析技术实现过程的核心参数,决定了该方法分析结果的准确性和稳定性,然而目前针对滤波带宽的选择主要依靠实践经验确定,严重制约了该方法的深入研究和实践应用。因此提出了一种基于阶次谱的Vold-Kalman滤波带宽优选方法,该方法结合了阶次数据的时域、阶次域的特点,并利用标准差指标,实现监测过程可控的Vold-Kalman滤波阶次跟踪分析。该方法可以根据不同故障类型以及使用者精度要求对滤波带宽进行适时更新,具有很大的应用价值。最后通过实验数据说明了该方法的实现过程及其有效性。
Vold-Kalman filter order tracking has attracted increasing attentions of researchers and engineers in condition that the monitoring rotating machines are under non-stationary operational working conditions. Its successful application depends upon the choice of Vold-Kalman filter bandwidth, however nowadays the selection of filter bandwidth is largely relayed on empirical method and sometimes filter bandwidth is selected in an arbitrary fashion. The accuracy and consistency of Vold-Kalman filtering results could not be ensured. Thus, the selection of a Vold Kalman filter bandwidth becomes a barrier for a proper application of the method. In this paper, an order spectrum based selection process of Vold-Kalman filter bandwidth is proposed. The method considers and makes full use of the relationship between order spectrum and Vold-Kalman filtering result so that an optimal Vold-Kalman filter bandwidth could be chosen and a controlled accuracy of Vold-Kalman filtering result could be obtained. Then, the method is applied to an experimental planetary gearbox system, the characteristic planetary sun gear fault order is being tracked and the proposed filter bandwidth selection process is demonstrated.
出处
《振动工程学报》
EI
CSCD
北大核心
2017年第2期319-324,共6页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51305067,51375078)
