Abstract:

In order to meet the requirements for the performance of the space deployable cable net-truss antenna, the initial structure of the antenna is optimized according to the structural characteristics. In the optimization, a multi-objective optimal mathematical model is established, with the thickness of the rigid edge truss and the radius of the flexible cable as the variables, the minimum mass and the highest surface accuracy as the goals, and with the natural frequency and the stress as the constraints. Then, the sequential quadratic programming method is adopted to solve the proposed complex and nonlinear model with kinetic constraints. Moreover, a case study is performed and some optimization results are obtained in different weight conditions to improve the performance of the antenna. It is concluded that the proposed model and method are not only feasible but also effective.

Key words: multi-objective optimization, deployable antenna, cable net structure, frequency constraint , sequential quadratic programming