Dynamical model modification of optical mirror holder based on sensitivity analysis

The characteristics of two modeling methods are discussed. Correlative theory of model modification method is introduced. The sensitivity factors of Youngs modulus, density, inner diameter and thickness of frame, motherboard and stiffened plate are obtained by sensitivity analysis. By comparing the theoretical results with the experimental data, the dynamical modification problem is established, and the dynamical model which contains nonlinear joints is updated. The results show that the average error is 2.5%, which satisfies the engineering requirements. At last, the orders are modified too.