Far and near field switching control method for lunar orbit rendezvous and docking laser radar

A laser radar and orbital rendezvous technology, which is applied in attitude control, control/regulation system, non-electric variable control, etc., can solve the problem that there is no control method for far and near field switching of lunar orbital rendezvous and docking.

Active Publication Date: 2021-04-27
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Judging from the currently published literature and patents, there is no related far-near-field switching control method for lunar orbit rendezvous and docking

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  • Far and near field switching control method for lunar orbit rendezvous and docking laser radar

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The lunar orbit rendezvous and docking lidar is mainly used for the rendezvous and docking of the ascender and the orbiter, and provides relative pose parameters for the docking of the two devices. As the distance approaches, the distance accuracy requirements for lidar are also higher, and the far-field target coverage is wide, but the accuracy of tracking far-field targets at close range is poor. Therefore, it is necessary to design short-range tracking of near-field targets, and then involve Field target switching process. The specific switching process is attached figure 1 As shown, the steps are:

[0021] Step (1): First, according to the measurement overlapping range of the far and near field targets, design the switching area [a2, a3] of the far and near fields. When the handover starts, it is necessary to judge wheth...

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Abstract

The invention relates to a far and near field switching control method of a lunar orbit rendezvous and docking laser radar. Firstly, far-field and near-field target switching can be carried out in a laser radar scanning state and a tracking state; and secondly, when cooperative target switching is carried out in a tracking state, the lasers are switched at the same time after switching is completed, and echo energy adjustment parameters need to be set with appropriate values so as to ensure that the switched target can be tracked rapidly; and then, the far and near field switching process must be completely completed, so that back-and-forth switching of the far and near field targets in a short time due to jittering of the guide distance or the final measurement distance is avoided; and finally, after target switching is started, a switching sign is set immediately, an external unit is notified, and coordination and smooth completion of laser radar far and near field target switching are ensured. According to the method, a substantial strategy can be provided for a software algorithm of the lunar orbit rendezvous and docking laser radar, and then smooth completion of the lunar orbit rendezvous and docking process is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of orbital rendezvous and docking, in particular to a far-near field switching control method for lunar orbital rendezvous and docking laser radar, which is used for the development of lunar orbital rendezvous and docking laser radar, and can also be extended to other rendezvous and docking laser radars used for rendezvous and docking design. Background technique [0002] In the implementation process of the lunar exploration project, the lunar orbital rendezvous and docking is the key technical link. After the lunar probe completes the lunar surface inspection, detection and sampling on the lunar surface, the ascender will take off from the lunar surface, ascend to the orbit around the moon, rendezvous and dock with the lunar orbiter staying in this orbit, combine them together, and return to the Earth. When the distance between the two aircraft is from 20km to 0.5m, the rendezvous and docking las...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/0833
Inventor 颜坤刘恩海周向东岳永坚冯志辉袁林晨李伟雄
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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