Control method for communication and calculation of space vehicle formation flight relative position under constraint

Abstract

The invention discloses a control method for communication and calculation of a space vehicle formation flight relative position under constraint. The method comprises the following steps of buildinga space vehicle formation flight process relative position error dynamic model; on the basis of a directed graph theory, building an space vehicle formation flight system model; considering the modeluncertainty, designing an adaptive relative position cooperated controller which does not need the relative speed information; considering the communication and calculation constraint; designing the event triggering proper time communication strategy. The method has the advantages that the whole position maneuverability by the space vehicle formation flight system is ensured; meanwhile, the formation structure keeps unchanged; the advantages of high robustness, effective reduction of communication quantity between formation space vehicles and calculation quantity of spaceborne computers and the like are realized; the method is applicable to the cooperated control of the space vehicle formation flight relative position.

Description

technical field [0001] The invention belongs to the technical field of spacecraft control, and in particular relates to a relative position control method for spacecraft formation flight under the constraints of communication and calculation. Background technique [0002] With the development of small satellite technology, spacecraft formation flight technology has been widely used, mainly in the fields of deep space exploration and earth measurement. The spacecraft in the formation communicate through the network to obtain the status information of adjacent spacecraft, and then design their own control signals. Finally, each spacecraft cooperates to complete variable baseline interferometry, synthetic aperture imaging, distributed sensing, etc. Formation flight missions. Compared with the traditional single large spacecraft, the spacecraft in the formation can be mass-produced and launched in a centralized manner, which greatly reduces the production cost and launch cost. ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to propose a self-adaptive relative position cooperative control method that does not require neighbor speed information, in view of the problems of limited communication resources, limited computing power of on-board computers, and model uncertainty in the spacecraft formation flight system. It is a control method that is robust and can reduce the amount of communication and calculation between formation spacecraft, and solves the problem of limited communication resources, limited computing power of onboard computers, and problems in the maneuvering process of the spacecraft formation flight system in a coordinated position. The problem of relative position cooperative control under model uncertainty makes the spacecraft formation flight system reduce the resource occupation of communication between formation spacecraft to a large extent, save on-board computing resources, and has robust capabilities

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