A liquid-filled actuator with gradual inertia and a method for high-precision attitude control of spacecraft

Abstract

The invention relates to a gradient inertia liquid-filled actuator and a method for high-precision attitude control of a spacecraft, wherein the gradient inertia liquid-filled actuator comprises: a vacuum container (1) for fixing and installing the entire flywheel structure, a flywheel bearing (2), Flywheel motor (3), flywheel (4); the control method is to establish a laminar boundary layer equation, calculate the velocity distribution in the boundary layer, establish the attitude dynamics equation of the spacecraft during the change of the inertia of the actuator, and obtain the attitude change The control torque Tc provided by the actuator is required. The invention improves the execution capability of the attitude control actuator during the attitude control process, increases the coverage range of the output torque, and simultaneously reduces the problems of dynamic unbalance and excessive resistance caused by the structure and process design problems when the rotating parts rotate at high frequency. .

Description

technical field [0001] The invention relates to a method for controlling a high-precision attitude of a spacecraft, and aims at a gradually changing inertia liquid-filled actuator and a method for controlling a high-precision attitude of a spacecraft. Background technique [0002] Angular momentum exchange actuators, especially reaction wheels, momentum wheels and control moment gyroscopes, have been fully applied in engineering practice as actuators for active attitude control of spacecraft. Among them, the technologies of reaction wheels and momentum wheels are very mature, and are widely used in high-precision and high-stability attitude control of various types of satellites at home and abroad. Due to its simple structure, high reliability, and fast system response, the constant speed control moment gyro has become the preferred attitude control actuator for long-life spacecraft in engineering practice. [0003] During the in-orbit operation of the spacecraft, the react...

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Problems solved by technology

On the other hand, the research on the fuel storage and stability analysis in the tank of the jet system has been started since the 1960s, but there has always been a large amount of mass redundancy and space waste in the spacecraft fuel storage, and the remaining space after the mission is completed The situation of tens of kilograms of fuel is very common, which affects the payload mass and space ratio of the spacecraft to a certain extent, and greatly increases the possibility of mutual influence and interference

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