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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。
In order to improve the precision of silicon material cutting process, based on the analysis of the tension fluctuation of wire in multi-wire cutting machine, a model of indirect tension control with multi-axis synchronization was proposed by combining model-free adaptive control and cross-coupling control. Model-free adaptive control improves the system dynamic response fastness, enhances system robustness, reduces tracking error and achieves accurate tracking. Cross-coupling control is used to eliminate the gain parameters and dynamic parameters between axes The matching effect reduces synchronization errors and enables multi-axis synchronization. The experimental results show that the proposed control scheme is very effective, which can improve the motion accuracy of multi-axis synchronization and reduce the fluctuation of wire tension.