| 基于BP神经网络的空间轮廓误差自适应补偿 |
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| 引用本文： | 李小力,陈威,闫蓉.基于BP神经网络的空间轮廓误差自适应补偿[J].中国机械工程,2010(16). |
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| 作者姓名： | 李小力 陈威 闫蓉 |
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| 作者单位： | 华中科技大学国家数控系统工程技术研究中心; |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2005CB724101); 国家青年科学基金资助项目(50805057); 863计划目标导向类课题(2009AA04Z149) |
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| 摘 要： | 提出了矢量化的空间轮廓误差建模方法,并基于BP神经网络提出了交叉耦合控制器参数的自适应调整方法,使用三层神经元,根据进给速率以及曲率的变化进行控制器参数的自适应调整,而在补偿量的分配问题上则充分利用已有数据,以减小系统的计算量。实例仿真表明,所提出的自适应控制方法在进给速率设定值变化以及加工轮廓的半径发生变化时,都可以很好地控制轮廓误差的大小,提高轮廓加工精度。
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| 关 键 词： | 轮廓误差 交叉耦合控制器 神经网络 自适应控制 |
Adaptive Compensation of Contour Errors Based on BP Neural Networks |
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| Li Xiaoli Chen Wei Yan Rong National Numerical Control System Engineering Research Center,Huazhong University of Science , Technology,Wuhan.Adaptive Compensation of Contour Errors Based on BP Neural Networks[J].China Mechanical Engineering,2010(16). |
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| Authors: | Li Xiaoli Chen Wei Yan Rong National Numerical Control System Engineering Research Center Huazhong University of Science Technology Wuhan |
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| Affiliation: | Li Xiaoli Chen Wei Yan Rong National Numerical Control System Engineering Research Center,Huazhong University of Science and Technology,Wuhan,430074 |
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| Abstract: | A vector modeling method of contour errors that simplified the error calculation was developed to improve the exiting methods.After that,an adaptive tuning method of parameters for cross coupling controller was presented to deal with the changing feedrate and path curvature based on BP neural network with simple three layer nerve cell.Moreover,the calculated amount of the system can be reduced effectively using exiting data to distribute compensation proportion.A simulation study shows that the adaptive con... |
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| Keywords: | contour error cross coupling controller neural network adaptive control |
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