The Deployment Dynamics Analysis Of A Space Deployable Precision Optical Telescope

The space precision deployable mechanism is an important part, and also is the key and foundation of the space deployable precision optical telescope. It is of great important to build the flexible multibody dynamic model and make deep research into the deployment dynamic characteristics of the space precision deployable mechanism.Several common modeling methods for the dynamics simulation of the space deployable mechanism are summarized in this paper, and the advantages and disadvantages of that are analyzed. Aiming at the concrete structure and the high precision characteristics of the space precision deployable mechanism, the fine modeling method for the dynamics of flexible multibody systems about the space precision deployable mechanism is researched.Based on the dynamic substructure and the component mode synthesis method, the modeling methods of the space precision deployable mechanism system and its components are proposed. Firstly, the space precision deployable mechanism is divided into some substructures. All the substructures' flexible models of the space precision deployable mechanism are built by the finite element software and the component mode synthesis method. The flexible modeling methods of the components that have complex composite structures are analyzed emphatically. Lastly, the dynamics models of flexible multibody systems about the space precision deployable mechanism are built by assembling all the substructures. The dynamic characteristics of the flexible multibody system in the deployment process of the space precision deployable mechanism are simulated and analyzed. The simulation results show that the modeling method introduced has better accuracy in reflecting the dynamic characteristics of the space precision deployable mechanism. The method also provides valuable reference for the flexible multibody dynamics modeling about this kind of complex and precision space deployable mechanisms.