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Satellite orbit control method

A control method and orbit control technology, applied in the field of satellite orbit control, can solve the problems of large engine interference torque and large orbit adjustment amount, and achieve the effect of continuous orbit control

Active Publication Date: 2013-05-22
BEIJING INST OF CONTROL ENG
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Problems solved by technology

However, when the attitude control engine of the ground-oriented satellite is faulty (that is, under-actuated), the orbit control engine has a large disturbance torque and requires a large amount of orbit adjustment, it is impossible to use only the attitude control engine or the momentum wheel to achieve attitude stability.
[0003] There is currently no method for fast trajectory control in the case of large disturbance moments using underactuated thrusters and momentum wheels

Method used

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Embodiment

[0041] The satellite control system consists of figure 2 As shown: the actuator is composed of attitude control motors (16 1N thrusters), orbit control motors (2 20N thrusters), momentum wheels (5 momentum wheels of 25Nms), and the satellite orbit control method described in the present invention Runs on the attitude control computer.

[0042] After a satellite was put into orbit, the attitude control engine of the yaw axis was unavailable, which caused the satellite to be in a state of underdrive of the attitude control engine. At the same time, the satellite's orbit control engine is affected by the plume during orbit control, which produces a large disturbance moment about the satellite yaw axis, which is about 0.5Nm. Due to the need for the normal work of the payload, the satellite must raise its orbit by 55km to the target orbit, so it is necessary for the satellite to perform continuous orbit control when the yaw is underdriven and the orbit control engine has a large ...

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Abstract

The invention discloses a satellite orbit control method, and the orbit control of a satellite is achieved under a condition that attitude control engine of one of a yaw shaft and a rolling shaft works abnormally. First, two shafts working normally of attitude control engines are in conditional judgment in a momentum-wheel-unloading mode, when the shafts meet the condition of the momentum wheel unloading, the two shafts working normally of the attitude control engines are in momentum wheel unloading, shafts working abnormally of attitude control engines are in attitude control by adoption of momentum wheels, and when the two shafts do not meet the condition of the momentum wheel unloading, the momentum wheels are utilized for three-axis attitude control until the satellite three-axis attitude angle and the angular speed are both smaller than a set angle threshold value and a set angular speed threshold value. Then, orbit control time is calculated, and an orbit control engine carries out orbit control according to the calculated orbit control time. Rapid orbit maneuver can be achieved under the condition of under-actuation.

Description

technical field [0001] The invention relates to a satellite orbit control method, which can be directly applied to the field of satellite orbit control with underdriven thrusters and momentum wheels. Background technique [0002] In the past, the orbit control of satellites was mostly based on the three-axis attitude control engine jet control to achieve attitude stability, or when the orbit control engine disturbance torque was small and the orbit control time was short, the momentum wheel could absorb the orbit control disturbance torque, and the wheel control Maintain a stable posture. However, when the attitude control engine of the ground-oriented satellite fails (that is, under-actuation occurs), the orbit control engine has a large disturbance torque and requires a large amount of orbit adjustment, it is impossible to achieve attitude stability only by using the attitude control engine or the momentum wheel. [0003] There is currently no method for fast trajectory c...

Claims

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Application Information

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IPC IPC(8): B64G1/24
Inventor 袁军王淑一雷拥军王新民宗红何英姿魏春岭刘其睿周剑敏赵性颂
Owner BEIJING INST OF CONTROL ENG
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