关键词: 多重打靶法, 内点法, 序列二次规划, 并行计算

Abstract: The implementation is based on the multiple target method.By turning the trajectory optimization problem of a booster glider into a nonlinear programming problem,optimizing a three degree of freedom reentry trajectory,using openmp with sequence quadratic programming optimizer,it is possible to perform parallel computing on the integrals in equation constraints.Using multiple target methods constructs a reentry trajectory optimization algorithm,and performs parallel computation on the model.The optimization method used on the MATLAB version is the interior point method,while the optimization method used on C is the sequential quadratic programming algorithm.The above program is converted based on MATLAB.The CAV-H model is selected for computing in the simulation experiment.Parallel computing achieves 8.398 times the acceleration ratio using openmp.The results of the multiple target method and the direct target method are basically consistent.The heat absorption capacity of the minimum heat absorption multiple target method is not much different from that of the direct target method with the minimum heat absorption as the objective function.Through simulation,the acceleration ratio is the highest when the number of threads is 13,and the average relative efficiency is more than 93%.

Key words: Multiple target method, Interior point method, Sequential quadratic programming, Parallel computing