Satellite structure optimization based on high fidelity surrogate model

YANG Lili1, KONG Xianglong1,2, LI Wenlong1, XU Hao1, YOU Chaolan1

Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 208-215.

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PDF(1452 KB)
Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 208-215.

Satellite structure optimization based on high fidelity surrogate model

  • YANG Lili1, KONG Xianglong1,2, LI Wenlong1, XU Hao1, YOU Chaolan1
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Abstract

To improve the design quality and computation efficiency of satellite structural optimization problems, a global optimization method based on high fidelity dynamic surrogate model(HFDSM)was proposed by combining radial basis function(RBF) surrogate model and adaptive simulated annealing (ASA)algorithm. In this method, an adaptive updating strategy of search space was constructed according to the global optimization results. During optimization process, new sampling points were added in the updated search space and then the surrogate model was reconstructed. The prediction error of surrogate model in the optimal point and the decreasing degree of the objective function were considered as the termination criteria of optimization process simultaneously, so that the global convergence of optimization and the model accuracy at the optimal solution were guaranteed. The optimization results of high dimensional test functions and the I-beam design problem show that the presented method can improve the optimization efficiency significantly with high accuracy. Finally, the proposed method was applied to a high dimensional optimization problem of satellite structure. In the optimization results, the maximum prediction error of constraints such as the fundamental frequency and structural dynamic response was only 0.65%, and the computational expense was reduced by more than 50% compared with directly adapting the adaptive simulated annealing algorithm. As a result, the proposed optimization method was validated in solving satellite structural problems with high accuracy and efficiency.

Key words

satellite structural optimization / dynamic surrogate model / radial basis function / adaptive simulated annealing(ASA) algorithm / high fidelity

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YANG Lili1, KONG Xianglong1,2, LI Wenlong1, XU Hao1, YOU Chaolan1. Satellite structure optimization based on high fidelity surrogate model[J]. Journal of Vibration and Shock, 2021, 40(23): 208-215

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