Spacecraft amplitude limiting adaptive attitude cooperative fault tolerant control method

Abstract

The invention relates to a spacecraft amplitude limiting adaptive attitude cooperative fault tolerant control method, which belongs to the technical field of multi-spacecraft formation flying. A redundant fault-tolerant algorithm is used to process a spacecraft fault. A control torque saturation controller carries out torque amplitude limiting. An adaptive algorithm control term compensates for inertia variation and external disturbance, and a fast convergence control algorithm is used for fast attitude cooperation. Other algorithms are used. The spacecraft amplitude limiting adaptive attitudecooperative fault tolerant control method is proposed. According to the invention, the consideration of a torque actuator fault, torque amplitude limiting, external disturbance and inertia variationuncertainty is more advanced; a spacecraft cooperative tracking error system can quickly converge; and the robustness and practicability of a control system are further improved.

Description

technical field [0001] The invention belongs to the technical field of multi-spacecraft formation flight, in particular to a space vehicle limiting adaptive attitude cooperative fault-tolerant control method. Background technique [0002] With the diversification of space missions, the traditional working mode of a single spacecraft alone can no longer meet the needs of practical engineering. In this context, the research on multi-spacecraft formation flight has developed rapidly and has become one of the research hotspots in recent years. [0003] The so-called multi-spacecraft formation refers to a working system composed of two or more spacecraft with close distances and interactive cooperation. Adjacent individuals in the formation realize information transmission and cooperative attitude control through sensor measurement devices, so as to achieve space detection and maintenance tasks. The formation of multiple small spacecraft solves the physical performance constrain...

AI Technical Summary

Problems solved by technology

[0004] With the continuous deepening of human research in the field of aerospace, more and more major space missions have been put into engineering practice. However, due to the special operating environment and complex structure of the spacecraft, sometimes failures inevitably occur, and eventually the mission fails. It has caused serious losses and impacts on sociopolitical, economic and even military aspects, and people are increasingly aware of the importance of reliability and fault handling for spacecraft

In addition, the spacecraft will be subject to the disturbance torque caused by the gravity gradient and solar radiation, and due to the influence of fuel consumption and the rotation of the solar panels, the inertia of the spacecraft is constantly changing and the degree of change is unknown. At the same time, the spacecraft’s The actuator is constrained by its own physical characteristics, and its output torque cannot be any required control force, and there is a torque limit

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