Non-axisymmetric surface parts have complex surface shapes,and it is difficult to deal with the equivalent interference in the process of tool control,so the machining accuracy is not high.To solve these problems,a fast tool servo control method for machining non-axisymmetric surface parts based on interference observer is proposed.Based on the dynamic behavior analysis results of the fast servo tool,the disturbance observer calculates the equivalent dis-turbance and obtains the disturbance compensation.Based on the disturbance compensation and dynamic behavior analysis,the equivalent control law and the switching control law are designed respectively,and the rapid tool servo control for the machining of non-axismetrical surface parts is realized by the incremental sliding mode controller.The results show that the tool servo control boundary and monitoring boundary are highly coincident,and the tracking off-set value is±0.02 μm,and the fluctuation range is relatively small.This shows that the method has higher machining accuracy and tracking stability.
关键词
干扰观测器/非轴对称表面零件/动态行为分析/快速刀具/伺服控制方法
Key words
interference observer/non-axisymmetric surface parts/dynamic behavior analysis/quick cutting tools/servo control method
维普
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