Abstract: According to the trend of maximization of phased array radar, a layout optimization with the position of supporting points and stiffeners is set up considering the power compensation to the subarray. The supporting points are selected from a finite number of locations allow installed, simultaneously, the contribution of the topology of the stiffeners is considered. For the aim of the best-fit root mean square, under the restriction of the maximum mass and stress, an optimization model is established. A continuous step function constructed to map the discrete variables to continuous variables can avoid the straightforward use in discrete variables, and the corresponding computing cost is lower. A large phased array radar is selected to verify the proposed method. A satisfied result is obtained and will be applied into the engineering.

Key words: Discrete variable, Phased array radar, Planeness error, Topological optimization