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在卫星发射阶段,采用锁定组件对空间相机中的活动部件进行锁定可以提高活动部件的基频和抗振动能力、减少振动对机构精度的影响。一种用于空间相机中活动部件锁定和解锁的小型锁定组件,采用电机正反转动带动滚子从动件径向凸轮机构来实现锁定、解锁功能。文章详细介绍了小型锁定组件组成和工作原理,通过设计实例对机构进行了受力分析计算、验证了电机和结构设计参数选择的合理性。装机地面试验和环境试验结果表明,所设计的锁定组件性能稳定、工作可靠,很好地满足了空间相机使用要求。
In the launch phase of satellite, using the locking component to lock the moving parts in the space camera can improve the fundamental frequency and anti-vibration ability of the moving parts and reduce the influence of the vibration on the mechanism accuracy. A small locking assembly for locking and unlocking movable parts in a space camera utilizes a forward and reverse rotation of a motor to drive the roller follower radial cam mechanism to realize locking and unlocking functions. In this paper, the composition and working principle of the small-sized locking components are introduced in detail. The force analysis and calculation of the mechanism are carried out through the design examples, which proves the rationality of the motor and structural design parameters selection. The results of the installed ground test and the environmental test show that the designed locking assembly has the characteristics of stable performance and reliable operation, which meets the requirements of the space camera.