整体叶盘集成制造单元A轴的摩擦补偿控制

Friction compensation control of A-axis in blisk integrated manufacturing cell

针对非线性摩擦对A轴定位精度的影响,根据静态和动态摩擦模型的不同动力学特性,提出两种不同的积分型滑模控制器。当系统处于不同摩擦阶段时,相应的摩擦补偿控制器被激活;当两种摩擦状态不断切换时,相应的摩擦补偿控制器也在不断切换。实验结果表明,该方法能有效提高A轴的定位精度和跟踪精度,使整体叶盘型面加工精度和表面一致性得到保证,并显著降低了表面粗糙度。

Aiming at the influence of nonlinear friction on the positioning precision of A-axis, two different integral sliding mode controllers were proposed according to different dynamic characteristics of the static and dynamic fric- tion models. When the system was in a different friction stage, the corresponding friction compensation controller would be activated; when the two friction states were constantly switched, the corresponding controller would be switched as well. Experimental results showed that this method could effectively improve the positioning and track- ing precision of the A-axis, ensure the blade machining precision and surface consistent, and significantly reduce the surface roughness.