Abstract: According to the locking problem of the active section of the micro magnetically suspended flywheel (MSFW) launching the micro nano satellite, a one off fusing locking /unlocking mechanism for micro MSFW is proposed. Its main structure and working principle are introduced. According to the requirements of flywheel locking force, the static analysis and calculation of locking mechanism are carried out. In order to ensure that the flywheel can meet the environmental mechanical conditions of satellite launch after locking and avoid resonance with the lock post after unlocking, the dynamics simulation of the locking mechanism is carried out via the finite element software. Both the statics and dynamics calculation results meet the mechanical requirements of the active phase of the satellite launch. The results show that fusing locking/unlocking mechanism can effectively protect the micro MSFW.

Key words: micro/nano satellite, magnetically suspended flywheel, locking device, finite element, simulation