Rate damping method combining momentum wheel and magnetic torquer

A technology of rate damping and magnetic torquer, applied in the field of rate damping, can solve the problem of long time of magnetic damping, and achieve the effect of reducing time

Active Publication Date: 2014-12-03
BEIJING INST OF CONTROL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the torque generated by the magnetic torque device is very small, and the time of magnetic damping is generally very long, often requiring more than several hours

Method used

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  • Rate damping method combining momentum wheel and magnetic torquer
  • Rate damping method combining momentum wheel and magnetic torquer
  • Rate damping method combining momentum wheel and magnetic torquer

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Embodiment Construction

[0024] Such as figure 1 As shown, the satellite's attitude control system includes an attitude control computer, a momentum wheel, a magnetic torque device, and a gyroscope. The gyroscope can measure the angular velocity of the satellite. The attitude control computer collects the angular velocity measured by the gyro.

[0025] The rate damping control of the attitude control computer is a closed-loop control. In each control cycle, the attitude control computer first collects the angular velocity measured by the gyro and the current angular momentum of the momentum wheel, and calculates the total angular momentum of the current star. Then, judge the size of the total angular momentum. When the total angular momentum is small, use the momentum wheel for rate damping to calculate the required control torque; when the total angular momentum is large, use the magnetic torquer for rate damping calculation. At the same time, the momentum wheel performs nominal speed maintenance ...

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Abstract

The invention discloses a rate damping method combining a momentum wheel and a magnetic torquer. The total angular momentum HT of a satellite is calculated according to the angular speed measured by a gyroscope and the current angular momentum of the momentum wheel; when the angular momentum is smaller, the tri-axial momentum wheel is used for quick damping; when the angular momentum exceeds the angular momentum absorbing capacity of the momentum wheel, the tri-axial magnetic torquer is used for rate damping. During magnetic damping, once the angular momentum of the satellite is reduced to a certain range, the momentum wheel is switched for damping. According to the method, characteristics of two kinds of rate damping by the momentum wheel and the magnetic torque are combined, reasonable switching between the momentum wheel and the magnetic torquer is realized, and the time required by rate damping is shortened.

Description

technical field [0001] The invention relates to a speed damping method using a combination of a momentum wheel and a magnetic torque device, which can fully utilize the fast damping speed of the momentum wheel without using a propulsion system, and reduce the time for satellite speed damping. Background technique [0002] When a satellite operating in orbit fails and causes attitude rollover, the attitude angular velocity needs to be eliminated, that is, rate damping. Generally, satellites are equipped with a propulsion system, and speed damping can be achieved by using the torque generated by thruster jets. [0003] In order to reduce weight, microsatellites are not equipped with propulsion systems such as thrusters, and generally use magnetic torquers to generate torque for rate damping, which is called magnetic damping. However, the torque generated by the magnetic torque device is very small, and the time of magnetic damping is generally very long, often requiring more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/24
Inventor 韩冬邢林峰郝金华谌颖龚宇莲李鹤谢晓兵徐子荔毕鹏波盖晓亮谢红
Owner BEIJING INST OF CONTROL ENG
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