In order to eliminate the hysteresis error of piezoceramic servo tool during non axisymmetric curved surface turning, three feedforward controlling mathema tical models have been established, i.

• 在分析压电陶瓷刀具迟滞特点的基础上建立了3种消除迟滞误差的前馈控制数学模型,即:升压模型、峰值降压模型及任意点降压模型。