Spacecraft Attitude Control Method Considering Mission Time Constraints

Abstract

The invention provides a spacecraft attitude control method considering mission time constraints, including: establishing a dynamic model and kinematics of the spacecraft attitude error according to the parameter uncertainty in the spacecraft model, unmodeled dynamics and external disturbances Model, according to the established dynamic model and the kinematics model, introducing a preset performance function to constrain the steady-state and transient performance of the attitude loop tracking error of the spacecraft, and perform controller design according to the constraints; Design a linear extended state observer, select the appropriate gain of the linear extended state observer, and obtain the estimated value of the system state and total disturbance; in the face of actuator saturation and partial failure, the tracking error of the system can converge to a preset area Inside. The invention realizes the tracking control of the attitude of the spacecraft considering the task time constraints, meets the stability and precision requirements of the attitude tracking, and has good robustness.

Description

technical field [0001] The invention relates to the technical field of spacecraft attitude control, in particular to a spacecraft attitude control method considering mission time constraints. Background technique [0002] Spacecraft refers to various types of aircraft that operate in space according to the laws of celestial mechanics and perform specific tasks such as exploration, development, and utilization of space and celestial bodies. Communication spacecraft, meteorological spacecraft, scientific exploration spacecraft, space shuttle, space station, etc., 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 the spacecraft platform technology (guidance, navigation and control technology) and control system. Due to the diversity of space...

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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