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在高速精密非圆车削时，微进给伺服机构的幅值衰减和相位滞后特性会产生较大的刀具轨迹跟踪误差，从而降低加工精度。为了减小刀具轨迹跟踪误差，达到高的加工精度，提出了一种增益—相位前馈补偿控制方法。这种方法不需要精确辨识微进给伺服机构的传递函数，只需测出其幅频和相频特性就可以实现补偿控制。理论分析结果证明，该方法可以大大减小刀具跟踪误差，而不影响控制系统的稳定性。采用增益—相位前馈补偿控制方法所完成的切削实验结果表明，微进给伺服机构的定位精度可以达到±０．０１ｍｍ。
In high-speed precision non-circular turning, the amplitude attenuation and phase hysteresis characteristics of the micro-feed servo will lead to large tool path tracking error, thus reducing the machining accuracy. In order to reduce the tool path tracking error and achieve high machining accuracy, a gain-phase feedforward compensation control method is proposed. This method does not need to accurately identify the transfer function of the micro-feed servo, just by measuring the amplitude and phase frequency characteristics of the compensation control can be achieved. Theoretical analysis results show that this method can greatly reduce the tool tracking error without affecting the stability of the control system. The results of cutting experiments using gain-phase feedforward compensation control method show that the positioning accuracy of micro-feed servo can reach ± 0.01mm.