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《工程(英文)》 >> 2017年 第3卷 第5期 doi: 10.1016/J.ENG.2017.04.007

动态变化滚珠丝杠进给系统的智能非同位控制策略

a State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, China
b Collaborative Innovation Center of High-End Manufacturing Equipment, Xi’an Jiaotong University, Xi’an 710054, China

录用日期: 2017-09-13 发布日期: 2017-10-31

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摘要

滚珠丝杠进给驱动系统由于其细长的螺旋主轴和部件之间连接部分的灵活性,具有变化的高阶动态特性,并且当采用直线光栅尺进行直接位置测量时,它还具有非同位控制的明显特征。长期以来,动态特性和非同位状况一直是运动和振动控制困难的根源,它们还会降低轴的运动精度。在本研究中,考虑到灵活性及其变化,我们建立了基于频率的子结构动态模型,并充分研究了动态特性对位置变化的依赖,开发出由模态特征修正器(MCM)和智能自适应调整算法(ATA)组成的控制策略。MCM 由峰值滤波器和陷波滤波器组成,从而将设备动态变为虚拟同位系统,且可以避免控制溢出。使用人工神经网络(ANN)作为平滑参数插值器,可以实时更新滤波器的参数,以便应对进给驱动系统的动态变化。我们已经在实际的进给驱动系统中验证了所提出策略的有效性和鲁棒性。

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