舵面-液压伺服机构连接刚度参数辨识

应用特征方程反问题的直接方法对舵面－液压伺服机构连接刚度参数进行了辨识。方法以动柔度矩阵特征方程为基础，通过界面位移求解界面内力，并由模态迭加法通过舵面上可测自由度振型，拟合扩充机构内部的不可测自由度振型，然后由界面位移和内力确定连接部位的刚度参数，对某导弹舵面－液压伺服机构建模，并辨识相应界面的连接参数，结果表明，该方法简便且精度高，为舵面－液压伺服机构的动力学建模和分析提供了有效方法。

PARAMETER IDENTIFICATION OF JOINING STIFFNESS OF RUDDER HYDRAULIC SERVO MECHANISM

The parameter identification of joining stiffness of rudder hydraulic servo mechanism can be done by using the direct method of characteristic equation anti problem. The method, on the basis of characteristic equation of dynamic flexibility matrix, can be used to resolve internal force in interface by interfacial displacement, and fit non measurable freedom mode of vibration inside the mechanism with a model method of superposition through a measurable freedom mode of vibration on the rudder, then determines the stiffness parameters in joint according to interfacial displacement and internal force. It has been used to model some missile's rudder hydraulic servo mechanism and to identify joining parameters of relevant interface. The results show that the method is simple and precise,and it provides an effective way to model and analyze dynamics of rudder hydraulic servo mechanism.