无转速计的旋转机械Vold-Kalman阶比跟踪研究

结合旋转机械升降速阶段振动信号的特点，提出了一种无转速计的旋转机械Vold-Kalman阶比跟踪方法。该方法利用能量重心法对振动信号进行频谱校正，估计瞬时频率，获得参考轴转速信号，再对振动信号进行Vold-Kalman阶比跟踪，提取阶比分量。与需要转速计的经典Vold-Kalman阶比跟踪方法相比，该方法无需鉴相装置，完全用软件方式实现，算法精度高。仿真和应用实例分析结果表明此方法能够在时域中准确地提取幅值和频率变化的阶比分量。

Tacholess Void-Kalman order tracking of rotating machinery

Combined with vibration signals characteristics during run-up or coast down of rotating machinery, a novel order tracking method for rotating machinery based on tacholess and Vold-Kalman order tracking filtering technique is proposed. The instantaneous frequency is estimated by the energy centrobaric method, then the order components from vibration signals can be extracted by the Vold-Kalman order tracking. Compared with conventional methods of Vold-Kalman ordering tracking technology, the proposed method has high precision in algorithms with no aid of tachometer and other special hardware. Results of simulation and application show that the proposed method could, in time domain, extract precisely the amplitude and the order components of varying frequency.