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Spacecraft Guidance Control Method and System Based on Nonlinear Orbit Calculation

An orbital calculation and spacecraft technology, which is applied in the direction of space navigation vehicle guidance devices, etc., can solve problems such as mobility and response speed cannot be guaranteed, and achieve the effect of real-time optimal orbital tracking capability.

Active Publication Date: 2016-05-04
CHINA ACAD OF LAUNCH VEHICLE TECH
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  • Application Information

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Problems solved by technology

Therefore, in the event of sudden interference, such as interception, obstacles, etc., its mobility and reaction speed cannot be guaranteed

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  • Spacecraft Guidance Control Method and System Based on Nonlinear Orbit Calculation
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  • Spacecraft Guidance Control Method and System Based on Nonlinear Orbit Calculation

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Embodiment Construction

[0025] The mode of operation of the present invention is described further below in conjunction with accompanying drawing:

[0026] 1. If figure 1 As shown, the operation process of the whole system starts from the "normalized input", and the user obtains the constraints of spacecraft orbit calculation (spacecraft launch time, launch location, target position, maximum overload, maximum speed, shooting surface, fuel consumption speed, distance Minimum distance of obstacles, range of angle of attack, rate of change of attitude angle) and cost function (the functional relationship between the optimization goal of orbit calculation and constraint conditions), using the system dimension reduction module to convert the system state equation x (1) =f(x,u) is used for dimension reduction processing, and the low-order solution equation z=g(x,u,u) of the spacecraft control variables is obtained (1) ,u (2) ,u (3) ,..., u (r) ) to the orbit calculation module, where x (1) is the firs...

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Abstract

The invention provides a spacecraft guidance control method and system based on non-linear orbit calculation. The method includes the steps that firstly, a system state equation for current orbit calculation of a spacecraft is acquired, a low-order equation of control variables is acquired after dimension reduction, then the control variables are acquired by calculating intermediate quantities acquired after dimension reduction, finally, a flight orbit of the spacecraft is controlled according to the control variables, the change of parameters relevant to spacecraft orbit calculation is checked in a period designated by a user, if the change is checked, the control variables are recalculated, the flight orbit of the spacecraft is adjusted, and if no change is checked, the spacecraft runs according to the originally-calculated orbit. The gap in the field of traditional spacecrafts is filled in, the spacecraft has real-time optical orbit tracking capacity, and the expression of the spacecraft in the aspects of obstacle avoidance, interception breakthrough and the like is improved.

Description

technical field [0001] The invention relates to a spacecraft guidance control method and system, in particular to a spacecraft guidance control method and system based on nonlinear orbit calculation. Background technique [0002] Compared with aircraft orbit calculation, traditional spacecraft orbit calculation mostly adopts ballistic mode. Therefore, in the event of sudden interference, such as interception, obstacles, etc., its mobility and reaction speed cannot be guaranteed. Contents of the invention [0003] The technical problem solved by the present invention is to overcome the deficiencies of the prior art, and provide a method and system for real-time calculation and control of the optimal orbit for spacecraft real-time orbit calculation and control. [0004] The technical solution of the present invention is: the spacecraft guidance control method based on nonlinear orbit calculation, comprises the following steps: [0005] (1) Obtain the boundary conditions of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64G1/24
Inventor 崔毅楠张恒解洪文何漫刘佳王晓路董伟宁学毕经元张冶陆小兵王立伟王长庆
Owner CHINA ACAD OF LAUNCH VEHICLE TECH