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Abstract: To make the output response of the control system of precision linear motor displacement system (PLMDS) accurately track the input instructions and to eliminate the adverse influences introduced by the load disturbance and the cut-ting-force fluctuation from direct drive, a zero phase error tracking control (ZPETC) scheme based on least-beat and non-ripple control in PLMDS is proposed for the application to the CNC
turning of non-circular cross-section part, which can eliminate the
system phase error caused by the unstable zeros and enhance the
system response rate as well. Simulation results show that this
method can effectively improve the system tracking performance. The
steady-state sinusoidal signal tracking error of the system can reach up to ±0.5 µm with rapid and accurate step response. Compared with general control strategies of PLMDS, this method increases the system tracking ac-curacy and possesses fine anti-disturbance ability, which is endowed with the potential for wide application.
Key words: 精密直线位移装置 最少拍无波纹控制 零相位误差跟踪控制 前馈控制
CLC No: TP391
国家自然科学基金(50105009)和国家“十五”科技攻关(2001BA205B04)资助项目. Received 20060613, received in revised form 20070214
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