Spacecraft guaranteed-performance attitude control method independent of neural network approximation

Abstract

The invention provides a spacecraft guaranteed-performance attitude control method independent of neural network approximation. The method comprises the following steps: 1, taking parameter uncertainty, unmodeled dynamics and external disturbance in a spacecraft mathematical model as total disturbance, and establishing a dynamic mathematical model and a kinematics mathematical model of a spacecraft attitude error control system according to the total disturbance; 2, introducing a preset performance function into the dynamic mathematical model and the kinematic mathematical model of the spacecraft attitude error control system to constrain steady-state and transient-state performance of an attitude loop tracking error of the spacecraft; and 3, designing a linear expansion high-gain observeraccording to the dynamic mathematical model and the kinematics mathematical model of the spacecraft attitude error control system, and obtaining the state and the total disturbance estimation value of the spacecraft attitude error control system. Under the condition of not depending on neural network estimation, tracking control over the spacecraft attitude 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 attitude control of spacecraft, in particular to a method for controlling energy-guaranteed attitude of spacecraft that does not rely on neural network approximation. Background technique [0002] Since the former Soviet Union launched the world's first artificial satellite on October 4, 1957, the scope of human activities has gradually expanded, starting a journey of exploration into unknown space. The competition between countries promotes the rapid development of aerospace technology, and related research results also accelerate the pace of social progress and greatly facilitate people's lives. Although my country's aerospace industry started relatively late, it has still made great achievements under relatively difficult conditions, thus realizing the leap of technology from scratch to excellence. On April 24, 1970, the Dongfanghong-1 satellite was successfully launched, ushering in a new era in Chin...

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Problems solved by technology

[0005] The present invention provides a spacecraft attitude control method that does not rely on neural network approximation. Its purpose is to solve the system uncertainty, external interference and measurement noise existing in the spacecraft itself, and the actuator cannot always produce ideal control. The Problem of Torque's Influence on Attitude Control of Spacecraft

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