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Full gesture capture method based on momentum wheel control

A momentum wheel, full attitude technology, applied in attitude control, adaptive control, general control system and other directions, can solve the problems of increasing hardware configuration, unable to see the sun, consumption of fuel capture speed, etc., to prolong life and increase safety factor Effect

Active Publication Date: 2013-05-08
BEIJING INST OF CONTROL ENG
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Problems solved by technology

The above method has the following disadvantages: it only considers the capture of the ground or the sun alone; the use of a propulsion system or a magnetic torque device for attitude capture consumes fuel or slow capture speed; the sun sensor is used, and there is a problem that the sun cannot be seen in the shadow area of ​​the earth; The use of a magnetometer not only increases the hardware configuration but also needs to consider the time-sharing work of the magnetometer and the magnetic torque device

Method used

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  • Full gesture capture method based on momentum wheel control
  • Full gesture capture method based on momentum wheel control
  • Full gesture capture method based on momentum wheel control

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Embodiment Construction

[0028] Such as figure 1 As shown, the specific implementation steps of the full-attitude capture method based on momentum wheel control in the present invention are as follows:

[0029] (1) Rate damping

[0030] The attitude and angular velocity are estimated based on the gyroscope measurement data, described by the attitude quaternion, and the default initial attitude is 0. The momentum wheel acts as an actuator and adopts the PD control law to damp the angular velocity of the satellite to a small threshold (such as 0.15 degrees / s, design basis: the star sensor can identify all-sky areas within 0.3 degrees / s).

[0031] (2) Stellar capture

[0032] 50 seconds after the rate damping is completed for a certain period of time (design basis: the capture time of the star sensor in the whole sky is better than 45 seconds), judge the data of the star sensor, if the star sensor does not recognize a valid star, turn the star at a certain angle to change the search In the sky area, j...

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Abstract

The invention relates to a full gesture capture method based on momentum wheel control. The full gesture capture method based on the momentum wheel control includes following steps of rate damping, star capture, gesture updating and geomagnetic strength calculation of star noumenon, the sun search and the sun directional gesture confirming, aim capture gesture confirming, and wheel control adjusting gesture and magnetic torquer unloading. The full gesture capture method aims to solving the problem of spacecraft full gesture capture, is based on momentum wheel control, and engineer operability is strong.

Description

technical field [0001] The invention belongs to the field of attitude control of spacecraft, and relates to a full-attitude capture method based on momentum wheel control. Background technique [0002] Full attitude capture refers to a control process when the spacecraft loses its attitude reference or needs to reorient its attitude. It can orient the spacecraft to the inertia; it can also orient the spacecraft to the sun in a certain direction, so as to ensure the energy of the entire star and recapture the earth at an appropriate time. , to return to normal operation mode; or directly to ground orientation operation mode. In the past, the jet control method was generally used in the full-attitude capture control process of satellites. In recent years, magnetic control capture research has been carried out for small satellites. However, most current satellites are equipped with momentum wheels, and researches on full-attitude capture using momentum wheels are rarely involve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08G05B13/04
Inventor 袁军王新民徐福祥柯旗张俊玲何英姿田科丰周剑敏赵性颂程莉魏懿
Owner BEIJING INST OF CONTROL ENG
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