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该文根据轴承-转子系统摩擦学设计的需要,重点研究了轴系动力性能在线计算,提出了动力性能神经网络计算方法.为了实现动力性能在线计算,提出了BP网络改进算法,提高了BP网络的计算能力.“,”This paper Studies mainly the on- line calculation method of dynamics properties for the bearing- rotor system on the basis of the request of tribological design for the bearing- rotor system. A calculation method of neural network of dynamics properties is presented. In order to realize on- line calculation of dynamics properties an improving calculation method of BP network is proposed. This method raises the calculation capability of BP network.