Analysis of Mechanism Reliability in Anti-dislocation Locking of Space Cable-strut Deployable Articulated Mast

摘要

The study is limit-locking mechanism of space cable-strut deployable articulated mast. On the base of structure and working principle, the mechanism's failure in ant-dislocation locking is analyzed and a new analytical model of reliability has been constructed. In the process of calculating reliability index, the factors such as size, assembly error, and space environment influence have been taken into consideration, and the method of MFOSM (Mean First Order Second Moment) has been applied. Based on the actual size of the mechanism, reliabilities of mechanism ant-dislocation locking have been calculated at both room temperature and space limit temperature. The main influencing factors have been analyzed and the improvement has been put forward. Calculations show that the new model has a high reliability in ant-dislocation locking.