角度编码器动态计量性能的仿真测试方法研究OA

In order to improve the dynamic measurement performance detection method of the angle encoder subdivision module,a method of generating moire fringe signal based on numerical simulation is proposed.The simulation model of three typical motion modes is designed and realized to replace the traditional turntable excitation,which enhances the controllability and anti-interference of the input signal.The accuracy of the model is verified by comparing the time domain and frequency domain of the measured signal(in the uniform speed mode of 1°/s,the amplitude error of the fundamental wave of the simulation signal and the actual signal is less than 2%,the phase error is less than 1°,and the simulation signal has no redundant harmonic noise).The fixed amplitude error and fixed frequency error experiments are further completed.The dynamic error under the fixed amplitude angular vibration input of 2～100 Hz is less than 0.72″,and the dynamic error under the fixed frequency angular vibration input of 0.001°～0.01° is less than 0.38″.The results show that this method provides a feasible scheme for systematically testing the dynamic error of the subdivision module under different angular vibration signal inputs,and provides support for constructing the standard measurement method of the subdivision module.