Aggregation and separation three-super control method of spacecraft multistage system

Abstract

The invention discloses an aggregation and separation three-super control method of a spacecraft multistage system, and is suitable for the fields of astronomical observation, high-resolution earth observation and the like with load ultra-high precision determination requirements. Star-load-fast steering mirror three-level attitude composite control is carried out on a spacecraft platform with three-super control performances such as ultra-high precision pointing, ultra-high stability control and ultra-sensitive control, attitude control precision is improved step by step from a star, load andfast steering mirror three-level system, and high-precision attitude control is provided for optical load high-quality imaging. The method is mainly advantaged in that when a spacecraft performs a rapid maneuvering task, the load does not perform attitude control, and aggregation control is realized by setting relatively large control parameters for an ultra-static platform actuator, when a spacecraft performs a passive push-broom observation task, attitude control is performed on a load, and separation control is realized by setting relatively small control parameters for a load controller,when the spacecraft performs an active push-broom observation task, coordination control is realized by setting moderate control parameters for the load controller.

Description

technical field [0001] The invention relates to a method for controlling the aggregation and separation of three super-superiors in a multi-level system of a spacecraft, which belongs to the field of spacecraft attitude control. Background technique [0002] At present, spacecraft generally use components containing high-speed rotors such as flywheels and control moment gyroscopes as actuators for attitude control systems. These high-speed rotating parts will inevitably produce high-frequency jitter and micro-vibration, which directly affect the working performance of the load. This cannot meet the requirements of space missions such as astronomical observations and extremely high-resolution earth observations that require high-performance control of optical loads. The spacecraft multi-level compound control system was born considering the demand for high-precision attitude control of such optical loads. The spacecraft multi-level composite control system refers to the spa...

AI Technical Summary

Problems solved by technology

The flexible vibration and high-frequency micro-vibration existing in the spacecraft star are directly transmitted to the payload, so that the optical payload cannot further improve the imaging quality

However, the traditional spacecraft attitude system is limited by the bandwidth of the controller and the accuracy of the actuator, so it cannot realize the active control of the flexible vibration and high-frequency micro-vibration, and the further improvement of the control accuracy and stability of the star is limited.

[0006] 2. There are contradictions between ultra-high precision control and ultra-high agility control, and they cannot be realized at the same time

Restricted by factors such as the measurement bandwidth of the sensor and the response bandwidth of the actuator, the parameter space left for the design of the control system is limited, and it is difficult to improve the control accuracy, stability, and agility. Moreover, there are contradictions in the control accuracy and agility, which cannot be improved at the same time. Limit the ability of remote sensing satellites to work

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