Abstract: For the demand of space mechanism for less drive, more output, and fast action, a single drive multi airfoil transient differential deployment mechanism is proposed, which has the characteristics of transient response, single input, multiple outputs, process differential, and synchronization in place; The effects of the mechanism parameters on the crank output impact and the transmission efficiency of the mechanism are analyzed; To solve the problem of mutual interference in the process of different output movements and realize multi-output differential movement and synchronous in place, the constraint conditions of angular displacement of the upper crank output and the left crank output are determined. At the same time, by reducing the angular velocity of each crank output in place under the initiating explosive device drive and improving the overall transmission efficiency of the unfolding mechanism as the optimization index, the parameters of the differential unfolding mechanism are optimized by multiple objectives; The dynamic characteristics of the optimized deployment mechanism and the changes of the angular velocity of each crank output are analyzed and solved. The results show that different crank outputs can achieve differential synchronization in place. Compared with the mechanism indexes before and after parameter optimization, the deployment time and energy impact of the optimized mechanism have been significantly improved. A multi-wing transient differential deployment mechanism prototype is built for experimental testing. The output angular velocity of each crank obtained from the experiment is compared with the solution results of the established dynamic model, which verifies the rationality of the dynamic model and the feasibility of the mechanism.

Key words: transient mechanism, deployment mechanism, parameter optimization, dynamics