Deployment Dynamics Of Solar Panels On Largescale Satellite

Modern spacecraft often carry large-scale and deployable appendages whose deployment will affect its attitude motion. Analyzing and forecasting the dynamic behavior is very important for the overall design of the spacecraft. The paper studies the deployment dynamics of the large-scale solar panels and the attitude influence of the satellite undergo the different deployment modes for the DFH-4 satellite.First, the dynamics equation of multi-system is derived by first kind of Lagrange equation and also the constrain equations of velocity are obtained, the final expression of the dynamics equation is hybrid one of algebra and differential. No simplification and assumption is made during the procedure of derivation to express the coupling and nonlinear characteristic.Second, the paper establishes the dynamic model of DFH-4 satellite with in which the deployment synchronization mechanism and deployment driving mechanism included using ADAMS and also makes dynamics simulation of the deployment of the large-scale solar panels based on the established system dynamic model.We specially study the deployment of the solar panels in two deployment models: one step deployment and deployment in steps. We discuss the dynamic characteristic of the deployment of the panels and the influenced attitude motion of the satellite undergone the solar panels deployment, and also analyze and summarize the simulation results of the two models in deployment time, deployment trace and the rule of the attitude motion of the satellite.Finally, the paper pilot studies the deployment of solar panels in fault modes. Analyze single deployment fault mode in two work cases: unilateral deployment normally and unilateral deployment fault. The simulation results of the attitude motion of the satellite, panels and connect link deployment motion was provided and discussed.