BP算法的改进及其在非线性转子建模中的应用  被引量:2

A New Improved BP Algorithm and Its Application on Modeling for a Nonlinear Rotating Shafting

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作  者:曹德武[1] 赵玫[1] 

机构地区:[1]上海交通大学振动,冲击,噪声国家重点实验室

出  处:《数值计算与计算机应用》2000年第2期121-126,共6页Journal on Numerical Methods and Computer Applications

摘  要:In order to simulate the response of shafting with hysteresis nonlinear elementsa new improved BP algorithm is proposed. In the new method, the iteration steps,which are previously determined by experience, are here optimized, to prevent errorfunction from falling into a local minimum. At the same time, a new excitationfunction is adopted, so that the learning process of BP network will not oscillateand diverge under large iteration steps. The above two improvements increase theconvergent speed and stability of BP network. An illustrative example is given toshow the effectiveness of the new method.In order to simulate the response of shafting with hysteresis nonlinear elementsa new improved BP algorithm is proposed. In the new method, the iteration steps,which are previously determined by experience, are here optimized, to prevent errorfunction from falling into a local minimum. At the same time, a new excitationfunction is adopted, so that the learning process of BP network will not oscillateand diverge under large iteration steps. The above two improvements increase theconvergent speed and stability of BP network. An illustrative example is given toshow the effectiveness of the new method.

关 键 词:BP算法 人工神经网络 非线性振动 转子 建模 

分 类 号:TP183[自动化与计算机技术—控制理论与控制工程]

 

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