基于BP神经网络的甘蔗收获机切割器振动性能研究
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摘要
针对小型甘蔗收获机切割器不平衡对切割器轴向振动的影响,为实现切割器振动的有效预测以及自动控制信号的获取,通过正交试验并利用BP神经网络技术与回归分析构建出了切割器螺旋以及刀盘振动的BP神经网络模型和回归模型。分析结果表明:基于BP神经网络建立模型的切割器螺旋与刀盘的振动正确拟合率达到了88.89%,且相对误差基本上在5%以内,而回归模型的切割压力正确拟合率只有38.89%。因此,基于BP神经网络建立的模型具有较高的精度,通过此BP神经网络模型,有效地解决了复杂信息特征的提取问题,减少了试验研究的次数与成本,为进一步的切割器刀盘以及螺旋振动的自动控制系统的研发奠定了基础。
In this paper the minitype sugarcane harvester cutter imbalance of cutter axial vibration,in order to effectively predict the realization of cutter vibration and obtain automatic control signal,the orthogonal experiment was constructed by cutter and cutter spiral BP neural network model and regression model of vibration analysis by using BP neural network and regression.The analysis results show that the correct fitting of cutter and cutter vibration spiral BP neural network model of the disk at a rate of 88.89% and the relative error is less than 5% basically based on the regression model of the cutting pressure correct fitting rate is only 38.89%,so BP neural network based on the established model has a high accuracy,the BP neural network the model effectively solves the problem of extracting complex features,reduce the number and cost of testing research,lay the foundation for the further development of the cutter wheel and spiral vibration automatic control system.
In this paper the minitype sugarcane harvester cutter imbalance of cutter axial vibration,in order to effectively predict the realization of cutter vibration and obtain automatic control signal,the orthogonal experiment was constructed by cutter and cutter spiral BP neural network model and regression model of vibration analysis by using BP neural network and regression.The analysis results show that the correct fitting of cutter and cutter vibration spiral BP neural network model of the disk at a rate of 88.89% and the relative error is less than 5% basically based on the regression model of the cutting pressure correct fitting rate is only 38.89%,so BP neural network based on the established model has a high accuracy,the BP neural network the model effectively solves the problem of extracting complex features,reduce the number and cost of testing research,lay the foundation for the further development of the cutter wheel and spiral vibration automatic control system.
引文
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[2]程志青.轮式小型甘蔗收割机台架部件的结构设计分析及试验研究[D].南宁:广西大学,2005:62-65.
[3]李婉,李尚平,戴小标.小型甘蔗收获机械试验平台的设计制造及物理实验[J].装备制造技术,2010(1):9-12.
[4]薛斌.小型甘蔗收割机切割系统的优化设计与试验研究[D].南宁:广西大学,2012.
[5]周建阳.小型甘蔗收割机切割系统的优化设计及试验研究[D].南宁:广西大学,2013.
[6]麻芳兰,何玉林,李尚平,等,甘蔗收获机切割性能的模糊综合评价与优化[J].农业机械学报,2006,37(12):79-82.
[7]杨家军,谢化斌,汤双清等.小型甘蔗收割机切割器结构动态设计[J].湖北工业大学学报,2003,18(2):3-5.
[8]麻芳兰,李尚平,何玉林,等.排刷式剥叶元件剥叶性能的BP神经网络预测[J].系统工程理论与实践,2006,26(4):114-119.
[9]麻芳兰,李尚平,何玉林,等.基于神经网络的甘蔗收获机剥叶元件性能研究[J].农业机械学报,2006,37(7):69-73.
[10]周喻,吴顺川,焦建津,等.基于BP神经网络的岩土体细观力学参数研究[J].岩土力学,2011(12):3821-3826.
[11]张国翊,胡铮.改进BP神经网络模型及其稳定性分析[J].中南大学学报:自然科学版,2011,42(1):115-124.
[12]柳小桐.BP神经网络输入层数据归一化研究[J].机械工程与自动化,2010(3):122-123.