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

A deep space detector and differential correction technology, which is applied in the direction of instruments, calculations, special data processing applications, etc., can solve problems such as extremely high initial value accuracy and orbit design accuracy errors

Inactive Publication Date: 2013-07-10
HARBIN INST OF TECH
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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 initi...

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

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Embodiment

[0140] In order to solve the precise orbit determination of the deep-space detector, the present invention optimizes the initial orbit parameters of the deep-space detector based on the genetic algorithm or the Pork Chop Plots method based on the method of B-plane parameters, thereby obtaining accurate orbit parameters, as follows Take the Mars exploration mission as an example.

[0141] Taking Mars exploration as an example, first establish the connection between the initial control parameters and the terminal parameters, where the initial control parameters are functions of the Earth’s escape orbit inclination, initial velocity, right ascension of ascending node and argument of perigee, and the terminal parameters are functions of the B-plane parameters and a function of the time to Mars. Then the partial derivative matrix is ​​decomposed into three parts, namely the initial state matrix, state transition matrix and terminal state matrix, where the initial state matrix is ​​...

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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...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 耿云海罗红吉陈雪琴孙亚辉束磊潘小彤
Owner HARBIN INST OF TECH
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