High-precision shape approximation low-thrust trajectory optimization method satisfying bi-objective index

• 作者: Ruiye JIANG Ming YANG Songyan WANG Tao CHAO Rajan SHANKARAN
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2022,（1）
• 页码范围: 436-457
• 页数: 22页
• 语种: 英文

摘要

The shape approximation method has been proven to be rapid and practicable in resolv-ing low-thrust trajectory;however,it still faces the challenges of large deviation from the optimal solution and inability to satisfy the specific flight time and fuel mass constraints.In this paper,a modified shape approximation low-thrust model is presented,and a novel constrained optimization algorithm is developed to solve this problem.The proposed method aims at settling the bi-objective optimization orbit involving the twin objectives of minimum flight time and low fuel consumption and enhancing the accuracy of optimized orbit.In particular,a transformed high-order polynomial model based on finite Fourier series is proposed,which can be characterized as a multi-constraint optimization problem.Then,a novel optimization algorithm is specifically developed to optimize the large-scale multi-constraint dynamical equations of shape trajectory.The key performance indi-cators of the index include minimum flight time,low fuel consumption and bi-objective optimiza-tion of the two.Simulation results prove that this approach possesses both the high precision achievable by numerical methods and low computational complexity offered by shape approxima-tion techniques.Besides,the Pareto front of the fuel-time bi-objective optimization orbit is firstly introduced to analyze an intact optimal solution set.Furthermore,we have demonstrated that our proposed approach is appropriate to generate the preliminary orbit for pseudo-spectral method.