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A single flywheel and magnetic combined control method and system for a bias momentum satellite

A bias momentum and joint control technology, applied in the field of satellite control, can solve the problems of increased error, low accuracy of horizon measurement, and low control accuracy, and achieve the effect of improving accuracy and stability

Active Publication Date: 2021-07-13
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Claims
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Problems solved by technology

However, due to the low measurement accuracy of the horizon itself, and the angle differential term is used in the precession control algorithm, the error is increased, so the control accuracy is low

Method used

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  • A single flywheel and magnetic combined control method and system for a bias momentum satellite
  • A single flywheel and magnetic combined control method and system for a bias momentum satellite
  • A single flywheel and magnetic combined control method and system for a bias momentum satellite

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Such as figure 1 , in this embodiment, the single flywheel and magnetic joint control method of the bias momentum satellite includes:

[0037] Step 101, according to the pitch attitude angle, calculate and obtain the command magnetic moment of magnetic unloading.

[0038] In this embodiment, the pitch attitude control can be performed through the pitch axis flywheel, and the pitch attitude angle can be obtained through star-sensitive measurement. Then, according to the pitch attitude angle, the magnetic unloading command magnetic moment is calculated.

[0039] Preferably, the angular momentum for control of the pitch axis can be calculated based on the PI+correction control rate of the attitude angle according to the pitch att...

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Abstract

The invention discloses a single flywheel and magnetic joint control method and system for bias momentum satellites. The method includes: calculating and obtaining the command magnetic moment of magnetic unloading according to the pitch attitude angle; The angular velocity and the yaw attitude angular velocity are calculated to obtain the magnetic chapter precession command magnetic moment; the magnetic unloading command magnetic moment and the magnetic chapter precession command magnetic moment are superimposed to obtain the total command magnetic moment. The invention makes full use of the measurement information of the star sensor and the gyro, realizes the flywheel control of the pitch axis, and the magnetic control of the roll / yaw axis, improves the accuracy and stability of the attitude control, and does not need to consider the algorithm switching of different magnetic field areas, which is simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of satellite control, and in particular relates to a single flywheel and magnetic combination control method and system for a bias momentum satellite. Background technique [0002] Due to its good output performance and no fuel consumption, the flywheel is generally the preferred actuator for high precision and high stability control. When the control ability of the three-axis flywheel is lost, the magnetic control can be used to sacrifice a certain control accuracy to ensure system stability. [0003] In the bias momentum satellite system, the strong coupling effect of roll-yaw axis makes the system produce long-period precession effect and short-period nutation effect. Therefore, jet or magnetic precession control can be used as a degraded mode when the star sensor fails and lacks three-axis attitude information, and only the roll axis information of the horizon is used to control the roll axis and yaw ax...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64G1/24B64G1/28
CPCB64G1/24B64G1/28B64G1/245
Inventor 刘川朱文山李圣文郑梦兴杨真
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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