Design and analysis of the root stiffness mechanism of the deploying and retracting mast

According to working principle of the deploying and retracing mast, this paper presents that the mast needs to be stiffened by a root stiffness mechanism. The double-slider mechanism with a spring is designed as the root stiffness mechanism. Then motion of the root stiffness mechanism is studied to set up vibrating equation of slider 2 based on the Lagrange equation. Displacement and velocity expression of slider 2 are obtained. At last, the Matlab program is used to check correctness of theory analysis. Elastic coefficient of spring and length of bars are selected by the program.