关键词: 航天器, 伸展机构, 锁（压）紧释放机构

Abstract: The sort of deployment mechanism, hold-down and release mechanism, and their general situation are summarized in this paper. There are four key technologies of deployment mechanism being analyzed, such as choosing power and analyzing the force （torque） margin, choosing the transmission and lubrication method, modeling and analyzing of the clearance nonlinear joint, improving the structural damp characteristic. Afterward other four key technologies of hold-down and release mechanism are discussed, such as choosing the supporting and fixing points, selecting the hold-down points, selecting and realizing the methods of the hold-down and release, designing the pre-load and the method of loading and measurement. In the end, the development direction of the Chinese spacecraft deployment mechanism and hold-down and release mechanism has been expected.

Key words: spacecraft, deployment mechanism, hold-down and release mechanism