关键词: 电压耦合, 动态性能, 非线性, 高速电主轴, 内模解耦, 前馈解耦, 泵阀复合, 进出口独立控制, 流量匹配, 压力流量复合

Abstract: To study the effects of nonlinear changes in coupling voltage on the dynamic performance of high-speed motorized spindle in spindle dynamic models, decoupling principles of voltage with the internal model control(IMC) are studied in comparison with the feed-forward mode control. It is found that the IMC is helpful to avoid the deficiency that the decoupling effects rely on the match of model parameters with actual parameters. A 170MD15Y20 motorized spindle with mist lubrication and the Matlab-Simulink software are used for tests and simulation analyses of the two control methods respectively. The results show that the coupling voltage of spindle is mainly affected by the change of frequency and torque current. Changing the given voltage of flux subsystem and torque subsystem and the proportion of reactive power in coupling loop not only has a great influence on the characteristic parameters such as the spindle power factor, output torque, anti-disturbance capacity and dynamic speed tracking accuracy, but also generate changes in the degree of spindle torque ripple, load capacity and speed slip which are in inverse proportion to changes in the coupling voltage. Therefore, according to the trends of curves that contain the above-mentioned characteristic information, such as the mechanical characteristic curve, the power factor curve and the constant torque curve, the decoupling effect of coupling voltage in high speed motorized spindle can be estimated exactly, and then, the spindle dynamic performance can be forecasted.

Key words: Dynamic performance, Feed forward decoupling, High-speed motorized spindle, Internal model control decoupling, Non-linear, Voltage coupling, Flow matching, Pressure and flow combined control, Pump and valve hybrid control, Separate meter in and meter out