Linearity hysteresis model of giant magnetostrictive components for non-cylindrical hole precision machining
Linearity hysteresis model of giant magnetostrictive components for non-cylindrical hole precision machining
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DOI：
10.3788/ope.20122002.0287
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
张. Z. Lei;邬义杰 Wu Yi-jie;刘孝亮 Liu Xiao-liang;王. W. Bin
中科院分区：
文献类型：
--
作者：
张. Z. Lei;邬义杰 Wu Yi-jie;刘孝亮 Liu Xiao-liang;王. W. Bin
根据超磁致伸缩元件非圆柱孔精密加工的刀具轨迹特点，采用纯滞后传递函数和高频驱动电流与微位移之间的线性关系模型，建立了超磁致伸缩元件的动态磁滞模型。通过对驱动电流和输出位移的相关辨识，得到了系统的纯滞后补偿参数。在此基础上，建立了无延迟驱动电流与输出位移的映射模型，通过直接逆模型和延迟补偿实时控制，使输出位移满足非圆柱孔镗削的理想刀位轨迹，验证实验结果表明，最大控制误差为2.7 μm，通过集成微位移反馈控制，进一步提高了组件的精度，最大控制误差为1.2 μm，最大相对误差为7%左右。
According to the tool path characters of non-cylindrical hole precision machining by giant magnetostrictive components,a dynamic hysteresis model of giant magnetostrictive components was established by a pure delay transfer function and the linearity model between high-frequency driving currents and micro-displacement responses.The pure delay compensation parameters of the system were obtained by the relevant identification of driven currents and output displacements with a certain frequency.Then,a mapping model of the driven currents and output displacements without delay was established.The output displacement met the ideal tool paths of non-cylindrical hole boring by direct inverse model and delay compensation in real-time control.The results in verification experiments indicate that the maximum control error is 2.7 μm,and the maximum relative error is about 10%.By integration of micro-displacement feedback control,the accuracy of the component is improved further,the maximum control error is 1.2 μm,and the maximum relative error is about 7%.