Spacecraft attitude control method considering task time constraints

Abstract

The invention provides a spacecraft attitude control method considering task time constraints. The method comprises the steps of establishing a kinetic model and a kinematic model of a spacecraft attitude error according to parameter uncertainty, unmodeled dynamics and external disturbance in a spacecraft model, introducing a preset performance function to constrain steady-state and transient-state performance of an attitude loop tracking error of the spacecraft according to the established kinetic model and kinematic model, and designing a controller according to the constraint; designing a linear extended state observer, selecting an appropriate gain of the linear extended state observer, and obtaining a system state and a total disturbance estimation value; and enabling the tracking error of the system to converge to a preset area under the condition of actuator saturation and partial failure. Tracking control over the spacecraft attitude considering task time constraints is achieved, the requirements for stability and precision of attitude tracking are met, and good robustness is achieved.

Description

Technical field [0001] The invention relates to the technical field of spacecraft attitude control, in particular to a spacecraft attitude control method considering task time constraints. Background technique [0002] Spacecraft refer to various types of aircraft that operate in space in accordance with the laws of celestial mechanics and perform specific tasks such as exploring, developing, and utilizing space and celestial bodies. Communication spacecraft, meteorological spacecraft, scientific exploration spacecraft, space shuttles, and space stations, as symbols of human exploration of the universe, have brought tremendous changes to human life. my country's aerospace technology has entered the forefront of the world, and the development of new aerospace technology has put forward higher requirements for the reliability and autonomy of spacecraft platform technology (guidance, navigation and control technology) and control systems. Due to the diversity of spacecraft missions...

AI Technical Summary

Problems solved by technology

In the actual control process, the spacecraft itself has system uncertainties, external interference, and measurement noise, and contains flexible accessories such as liquid fuel tanks, solar panels, and large antennas, and the limitations of the physical conditions of the actuators and measuring components and The various constraints caused by mission requirements make it difficult to guarantee the stability and control accuracy of the spacecraft attitude control system; moreover, the development of the modern aerospace industry requires the spacecraft to converge to the attitude of the spacecraft as soon as possible while ensuring the control performance. Balance Points to Meet Time Constraints of Space Missions

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