| Citation: | FENG Ming, ZHOU Chengyu, ZHANG Kun, et al. Separation technology of system noise in error motion test[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(4): 666-673. doi: 10.13700/j.bh.1001-5965.2019.0316(in Chinese)
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Since the error motion of the high-precision spindles is often in the same order as the noise of the test system, the measuring accuracy of the three-point method is greatly reduced by the noise signals. With the synchronous error motion (SEM), a combined processing algorithm with equal angle sampling and reconstruction, ensemble average filtering and wavelet filtering for noise-containing signal is proposed. A method for quantitatively determining the wavelet decomposition layer based on the diameters of both sensor and measured spindle is proposed. The simulation results show that the new combined method has good denoising effect. With the asynchronous error motion (ASEM), a method for eliminating the noise of the test system is proposed, and the influence of the number of test cycles on ASEM is studied. In addition, a test system was built and the effectiveness of the proposed methods was experimentally verified.
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