A model to simulate the non-Gaussian non-white-noise random errors of gears is developed with the influence of rotational speed considered. The gear transmission errors is first decomposed into harmonic and random components based on the spectral analysis. Then, a second-order Markov pro- cess with time-variant parameters is used to simulate the non-Gaussian non-white-noise random compo- nent of gears. The second-order Markov process is used as a shaping filter.
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