作　　者： ; ; ;

机构地区： 北方工业大学机电工程学院

出　　处： 《华中科技大学学报（自然科学版）》 2011年第12期37-40,共4页

摘　　要： 针对高精度复杂截面形状的柔性辊弯成形伺服控制问题,提出可变时域的离散插补控制,应用板材轮廓曲线曲率变化快慢来实时修改插补周期.在板材前进过程中,利用当期插补节点处板材轮廓曲率变化率计算下一插补节点插补时域.当曲率变化率等于0时,则为最大值;当不等于0时,若为极值则下一插补时域为最小值,若不为极值则等比例增加时域值.通过实时调整加工过程中的插补时域,最终实现曲率快速变化时插补点密集,曲率缓慢变化时插补点稀疏,建立兼顾精确点位与高效拟合伺服控制模型.实验结果表明:可变时域的离散插补控制对复杂截面形状的板材成型提供了一种较好的运动控制方法. Conventional discrete interpolation mostly have constant interpolation cycle and interpolation time-domain.As for complex curve trajectory interpolation,interpolation points are very few when the curvature changes rapidly,while the interpolation points are relatively excessive when the curvature changes slowly.Therefore,a variable time-domain discrete interpolation control method was adopted,which could change interpolation cycle by the speed of curvature change,thus interpolation points were dense when the curvature changes rapidly,while the interpolation points were sparse when the curvature changes slowly.Experiments results show that the variable time-domain servo motor control is a good operating control method for the sheet steel forming in complex cross-section shape.

关 键 词： 柔性辊弯成形 可变时域 伺服控制 离散插补 运动控制

领　　域： [金属学及工艺]