OPTIMIZATION AND DESIGN METHOD FOR GRADIENT SEGMENTATION OF INTERVALS OF SPACECRAFT PULSE RENDEZVOUS TRAJECTORY

摘要

An optimization and design Method For gradient division of intervals of a spacecraft pulse rendezvous trajectory belongs to orbit design and optimization technologies in the field of spacecraft orbit dynamics and control, and in particular, to a rendezvous trajectory design technology in which a global optimization solution to a spacecraft rendezvous trajectory is obtained through calculation based on an interval arithmetic mathematical model. For the global problem of the method, a gradient optimization result is only used for determining an interval segmentation point and updating a value of an upper bound of a target function, thereby preserving overall importance of an interval optimization algorithm. For the problem of a large computation amount in the interval optimization algorithm, a gradient optimization method is introduced, so as to update the value of the upper bound of the target function quickly and use a gradient segmentation method; and in combination with a symbol segmentation method and an interval optimization strategy, intervals that do not comprise an optimal solution are effectively separated and removed, thereby improving operational efficiency. To resolve the problem of high storage requirements of the interval optimization algorithm, only a limited number of intervals are selected for processing in each iteration, thereby ensuring that a storage space overflowing phenomenon does not occur in an operation.