Influence analysis on dynamic characteristic parameters of solar array drive system.

Solar Array Drive System (SADS) is characterized by rigid-flexible coupling and electromechanical coupling, thus the influence regulation for the dynamic characteristic of SADS becomes to be very complicated. Based on the motion particularity of solar array, the mechatronics model of SADS was simplified to an equivalent structural dynamics model sharing the same dynamic characteristic with SADS in this paper. This model was validated by comparing with dynamic characteristic identified from system simulation results, and the influence analysis on system dynamic characteristic parameters was also implemented. The results indicate that the effect of drive assembly on system dynamic characteristics is in accord with that of a kind of elastic boundary on structure dynamic characteristics of solar array. The system dynamic characteristic could be impacted by rated torque amplitude, number of teeth in motors, reduction gear ratio, transmission efficiency of the gearing chain, lubrication performance between brushes and slip rings, drive speed and so on, among these reduction gear ratio and viscous friction ratio have the widest impact range to equivalent stiffness and damping, respectively. The dynamic characteristic of SADS with large reduction gear ratio approximates to the structure dynamic characteristic of solar array with cantilever boundary condition. [ABSTRACT FROM AUTHOR]