Astronomical survey camera shutter locking mechanism design and analysis and testing

摘要

During the launch phase of the survey camera, its shutter will experience a harsh dynamic environment. We proposed an elastic compression scheme to prevent the shutter blade from hitting the surrounding structure. The elastic member has a maximum stress at each stage of locking. In order to make this stress as small as possible, we optimized the thickness of the elastic member from 1070 to 666 MPa, which met the safety factor requirement. We performed finite element simulations and experiments on the locking mechanism, and the results showed that: the motor torque curves obtained from theoretical calculations, simulation analysis and tests coincided well. The maximum locking torque of the locking mechanism obtained by theoretical calculations, simulation analysis and experiments also coincided well, and all three of them were within the design target of about 25 N m, which met the requirements of shutter locking torque greater than 20 N m. Our proposed elastic compression scheme effectively solved the problem of blade fixation during the shutter launch phase.