Research on CDO Trajectory Optimization Based on Cost Index using Gaussian Pseudospectral Method

Abstract

The shortest descent time and the lowest fuel consumption are the focus of CDO trajectory optimization research. Generally, the CDO trajectory optimization based on the best single parameter has certain limitations. In this paper, a direct optimization method of CDO trajectory based on the integrated parameters of fuel consumption and total flight time is presented, namely the CDO trajectory segmentation optimization method based on cost index with Gaussian pseudospectral method. Theoretical analysis indicates that an optimal descent trajectory can be easily found, through track segmentation and CI compromise. At same time, the CDO trajectory optimization should mainly study the optimization of segment 1 and segment 2. The results of status analysis are shown that CDO trajectory optimization based on cost index is the optimum.