多线切割机的无模型自适应交叉耦合控制

Model-free Adaptive Cross Coupling Control of Multi-wire Saw

为提高硅材料切割加工的精度,在分析多线切割机钢丝线张力波动的基础上,将无模型自适应控制和交叉耦合控制相结合,提出了一种多轴同步的间接张力控制策略。无模型自适应控制提高了系统动态响应的快速性,增强了系统的鲁棒性,减小了跟踪误差,实现了准确跟踪;交叉耦合控制用于消除各轴之间的增益参数和动态参数不匹配的影响,减小了同步误差,实现了多轴同步。实验结果表明所提出的控制方案十分有效,可提高多轴同步的运动精度,减小钢丝线张力波动。

For enhancing silicon material sawing precision, on the basis of analyzing fluctuation of wire tension in muhi-wire saw. An indirect tension control strategy of multi-axis synchronization is presented which is based on the combination of model-free adaptive control and cross coupling control. Model-free adaptive control enhances the fastness of the system dynamic response, increases system ro- bustness, reduces tracking error, and implements the accurate tracking. Cross coupling control eliminates the influences of mismatc- hing of the gain parameters and dynamic parameters between the axis, minishs synchronization error, and realizes multi-axis synchroni- zation. Experimental results show that the proposed tension control method is very effective. It can improves motion precision of multiaxis synchronization and reduces fluctuation of wire tension.