摘要
为了提高变速非圆车削中直线伺服单元的跟踪精度和鲁棒性 ,建立了变速非圆车削的进给驱动直线电机、运动控制目标函数、主轴变速、切削力等的数学模型 ,分析了主轴变速精度对直线伺服单元控制的影响。应用重复控制理论设计了适于直线伺服单元的重复控制器 ,给出了详细的设计过程和稳定性分析 ,对控制器的性能进行了仿真分析。结果表明 ,基于重复控制的直线伺服单元能很好地跟踪变速非圆车削中刀具运动的目标值 ,能抑制波动的切削力对跟踪精度的影响。
In order to enhance the tracking and robust performances of linear servo unit in variable spindle speed noncircular turning, the feed driving linear motor model, desired trajectory function of tool motion control, variable spindle speed model and cutting force model had been built. Then, the effects of variable spindle speed accuracy on the linear servo unit was analyzed. Furthermore, the theory of repetitive control was used to design the controller available for the linear servo unit, whose design details and stability analysis were presented. Finally, simulation analysis of the controller performances was carried out. The results show that the linear servo unit with repetitive controller can track the desired trajectory of the tool motion and inhibit the effects of fluctuating cutting force on the tracking accuracy.
出处
《机械工程》
CSCD
北大核心
2004年第5期446-449,共4页
基金
国家自然科学基金资助项目 (5 0 10 5 0 0 9)
十五国家科技攻关项目 (2 0 0 1BA2 0 5 B0 4)
