Multi-objective Optimization for a Cable-truss Deployable Space Antenna

In this paper a FEM analysis model of cable-truss deployable antenna is proposed according to the special requirements for spaceborne antenna. Based on this FEM model,an optimal mathematic model is built with the minimum weight and surface accuracy as the objective function,the truss thicknesses and cable tensions as the design variables the natural frequency as the constraint. Since it is difficult to solve such a complex model involved geometric nonlinearity calculation,a genetic algorithm is used to facilitate the multi-objective optimization and to find the global optima of this problem. The representative result selected from the Pareto-optimal front shows the validity and effectiveness of the proposed method and model.