Optimized Design Of Auxiliary Support For Agile Satellite Solar Panel

With the characteristics of high precision and fast stable posture agile motor, agile small satellite can effectively enhance the working mode and improve the efficiency of satellites, and has become the main development direction of modern earth observation satellites. During the process of rapid maneuvering and stabilizing，the precision of the stability will be affected, even the stability will be destroyed by the vibration of the flexible panels. In engineering, auxiliary support structure is adopted by small satellites to improve the fundamental frequency of panels and to restrain the influence of vibration of solar panel. To solve this problem, the optimization design of several parameters of auxiliary support structure on the solar panels will be made not only theoretically but also experimentally in this dissertation, including the following aspects:First of all, the overall scheme of the optimization design which conforms to the practical size and the load distribution is proposed. Then the brief analysis on mechanical properties of the support bar with ribbon spring is made, and the theoretical foundations of the two modeling methods, the vibration mechanics method and finite element method are given respectively. Through derivation, the two methods are suitable for being chosen as the theoretical basis of the parameter optimization.Secondly, in order to optimize the support position on the solar panels, vibration differential equation is established, and the forced vibration hypothesis of supporting points is put forward, and the constraint equations of five constraint conditions are given, then the analytical vibration equation and the anchor position with the maximum fundamental frequency are solved.In order to prove the accuracy of this handling method, the general solution of the classical vibration equation is taken into the eight constraint equations, and the calculation results are the same as the former. The simulation results of the finite element method show that, the curve of the obtained analytical vibration equation and the formation of the finite element simulation are consistent.Finally, based on the optimization, the finite element mathematical model is established, and the stiffness matrix and mass matrix of the system are derived, the curve which shows the relationship between the fundamental frequency of the structure system and the support angle are obtained by solving eigen value problem.In order to the credibility of the theoretical results and the finite element simulation, experimental program which can factually simulate the expansion and lock of the panels are designed, the physics laboratory tests shows that the results of the experiments are basically in accordance with the conclusion of the theoretical analysis, and the feasibility of this subject is finally confirmed.