Distributed spacecraft formation adaptive finite time attitude cooperative tracking control method

A time-limited, tracking control technology, applied in the field of multi-spacecraft formation flight, which can solve the problem of unknown degree of change of spacecraft rotational inertia.

Active Publication Date: 2020-10-30
YANCHENG INST OF TECH
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Problems solved by technology

At the same time, the spacecraft will be subject to unknown disturbance moments caused by gravity gradient, solar light pressure, solar radiation, etc., and due to the influence of fuel consumption, liquid sloshing and solar panel rotation, the moment of inertia of the spacecraft will change from time to time. degree of change unknown

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  • Distributed spacecraft formation adaptive finite time attitude cooperative tracking control method
  • Distributed spacecraft formation adaptive finite time attitude cooperative tracking control method
  • Distributed spacecraft formation adaptive finite time attitude cooperative tracking control method

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[0061] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical scheme of the present invention, and cannot limit the protection scope of the present invention with this.

[0062] refer to figure 1 , the distributed spacecraft formation adaptive limited-time attitude cooperative tracking control method provided by the present invention specifically includes the following steps:

[0063] Step 1, establish the inertial coordinate system and the body coordinate system, and determine the attitude of the spacecraft;

[0064] Step 2. Consider a formation system including n follower spacecraft and 1 leader spacecraft, and take the spacecraft with time-varying inertia as the research object, and establish the quaternion attitude kinematic equation and dynamic equation of each spacecraft:

[0065]

[0066]

[0067] in, is the attitude unit quaternion vecto...

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Abstract

The invention discloses a distributed spacecraft formation adaptive finite time attitude cooperative tracking control method, which comprises the following steps: establishing a communication topological structure in which only part of follower spacecrafts can communicate with a pilot spacecraft; designing a distributed finite time observer, so that the follower spacecraft can observe the pilot information; and adopting a fast nonsingular terminal sliding mode control variable to enable the follower spacecraft to conduct fast cooperation and tracking on the pilot spacecraft. The method provided by the invention has the characteristics of short cooperation time and high control precision.

Description

technical field [0001] The invention relates to the technical field of multi-spacecraft formation flight, in particular to a distributed space vehicle formation adaptive limited-time attitude cooperative tracking control method. Background technique [0002] With the diversification of space missions, the traditional working mode in which a single spacecraft completes the task alone has been difficult to meet the needs of practical space missions such as synthetic aperture imaging, space exploration, satellite capture, space-based interferometry, and long-distance communication. In this context, the research on multi-spacecraft formation flight has developed rapidly, and attitude coordination, as the basic technology of spacecraft formation flight, has become one of the research hotspots in recent years. [0003] The attitude cooperative control is carried out through information transmission between individual spacecraft in the formation, so as to achieve specific space mis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/10
CPCG05D1/104
Inventor 高直朱志浩
Owner YANCHENG INST OF TECH
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