| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 90 === The Vold-Kalman tracking filter (VKF) is one of order tracking techniques for rotating machines. The tracking results from the VKF algorithm possess extremely accuracy compared with conventional methods such as FFT-based techniques. It is a useful tool for estimating the energy of a certain order component embedded in a dynamic signal resulting from the operation of a rotary machine. Besides, the VKF order tracking techniques offer helpful information for interpretation of physical phenomena.
The contents of the thesis include introduction, the theoretical part and numerical implementation of the VKF techniques, the application of the angular-displacement VKF technique and conclusion. The thesis have discussed the relation between the weighting factor to frequency and time-response. This result supplies for choosing to choose weighting factors. In real application, the signal is generated by two electric motor with different transmitting system and a rotate machine. By measured signal, demonstrate VKF can decouple closing or crossing frequency trajectories. In conclusion, discuss the differences between the VKF and the short time Fourier transform.
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