According to a typical structure of non-resonant elliptical vibration cutting (EVC) device, the dynamic hysteresis characteristics of piezoelectric stack in non-resonant EVC device are considered, the static PI hysteresis model is segmented into dynamic weights, and the dynamic PI hysteresis model is constructed to describe the relationship between the axial input voltage and the output displacement of the non-resonant EVC device. The feed-forward controller of the non-resonant EVC device is established by inversion of the hysteresis model, and in order to further improve the accuracy and stability of the control system, the PID feedback link is introduced and the feed-forward is used. The compound control method of inverse controller and PID feedback is used to control the sinusoidal displacement of the specified frequency and amplitude of each axial output of the non-resonant EVC device, so that the motion frequency, shaft length and inclination of the elliptical vibration track can meet the requirements, and the non-resonant EVC device can be controlled. The experimental results show that the non-resonant EVC device can output an elliptical vibration trajectory with an adjustable amplitude and dip angle below 100Hz under compound control, and the motion error is less than 3.5%.
基金资助:国家自然科学基金 (51675277)。
引用本文:
栾博,张臣,霍建强,甘晓明. 基于压电迟滞模型的非共振椭圆振动切削装置控制研究[J]. 航空制造技术, 2019, 62(11): 66-72.
LUAN Bo, ZHANG Chen, HUO Jianqiang, GAN Xiaoming. Research on Control of Non-Resonant Elliptical Vibration Cutting Device Based on Piezoelectric Hysteresis Model. Aeronautical Manufacturing Technology, 2019, 62(11): 66-72.