Model analysis and optimization of internal framework of new type spherical stabilized platform

SUN Lu-wei, WU Xiu-dong, LV Qiong-ying, HAI Zhi-yuan

(College of Mechanical and Electrical Engineering, Changchun University of Science

and Technology, Changchun 130022, China)

Abstract: Aiming at the stabilization of the line of sight(LOS) of electrooptical(EO) of the new type spherical stabilized platform and the study of the dynamic performance of system′s framework, the 3D model of the framework and the EO was built by Pro/E software, at the same time, the modal analysis of the internal framework and the EO of the new type spherical stabilized platform was done by ANSYS Workbench software. The first five natural frequencies and mode shapes were calculated through finite element mesh, setting the material parameters, adding boundary conditions and a series of steps about the internal framework, it was found out that the frequency of the design of the new type spherical platform was not in the frequency range of resonance, the requirements of design was satisfied by identifying the weakest part of the framework in the first five modes of the natural frequency. The results show that, the finite element method(FEM) analysis is an effective tool to optimize the system′s dynamic performance to assure the optimal working conditions far from the resonating failure. According to the result of the calculation, the modifications to the design are presented for the future improving of the new type spherical stabilized platform to the overall dynamic performance and it provides a theoretical basis about the design of the new type spherical stabilized platform.