Track design method of deep space probe and based on differential modification

Abstract

A track design method of a deep space probe and based on differential modification relates to the field of track design of the deep space probe. The track design method includes the following steps: calculating an initial value according to track parameter of the deep space probe and determined by a genetic algorithm or a Pork Chop Plots method, conducting track numerical integration operation under an accurate kinetic model according to the initial value of control parameter to obtain a terminal parameter value, comparing the parameter value obtained by calculation with a standard parameter to obtain a parameter deviation value to calculate a new control parameter according, utilizing the new control parameter to conduct track integral operation on the kinetic model again to obtain a new terminal parameter value deviation value and repeating the above process till the terminal parameter meets the requirement for accuracy. The track design method breaks up a partial derivative array into three portions, and provides a specific expression form. The new track parameter obtained by calculation meets any requirement for accuracy. The partial derivative array is suitable for different requirements for navigation calculation and error analysis and the like.

Description

technical field [0001] The invention relates to the field of track design for deep space probes, in particular to a precise track design method for deep space probes based on differential correction. Background technique [0002] The precise orbit design of the deep space probe is the process of solving the nominal orbit by using the precise dynamic model and numerical method based on the initial value obtained from the preliminary design. It is a two-point boundary value problem, that is, the Lambert problem. At present, most of the differential correction methods at home and abroad are calculated based on intelligent optimization algorithms and partial derivative information. Among them, the precise trajectory design based on the differential correction method has been widely used, and has been applied in commercial software such as STK. Most of the solutions of the partial derivative matrix use the method of state transfer, which has a fast convergence speed, but the accu...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem that the existing accurate orbit design method for deep space detectors has extremely high requirements on initial value accuracy, resulting in large orbit design accuracy errors, and further provides a differential correction-based orbit for deep space detectors design method

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