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A Satellite Attitude Control Method for Space Cooperation Target Tracking and Imaging

A technology for satellite attitude control and cooperative target, which is applied in the direction of target search control, attitude control, non-electric variable control, etc.

Active Publication Date: 2017-05-31
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing literature has carried out in-depth research on the attitude control method of staring and imaging of fixed targets on the ground by video satellites, but has not involved the tracking and imaging attitude control of space cooperative targets.

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  • A Satellite Attitude Control Method for Space Cooperation Target Tracking and Imaging
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  • A Satellite Attitude Control Method for Space Cooperation Target Tracking and Imaging

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Embodiment Construction

[0080] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0081] A satellite attitude control method for space cooperative target tracking and imaging, the specific steps are as follows:

[0082] Step 1: Given the orbital elements of video satellites and space cooperation targets

[0083] The video satellite will use the design parameters of a certain type of video satellite, and the target will be the design parameters of Tiangong-1. The simulation start time is 20160501UTC, and their orbital elements are shown in Table 1.

[0084] Table 1 The orbital elements of a certain type of video satellite and Tiangong-1

[0085] A certain type of video satellite Tian-Gong Semi-major axis (km) 6821.235 6767.416 Eccentricity 0.000689 0.001972 Orbit inclination (°) 97.314 42.794 Ascending Node Right Ascension (°) 201.542 168.994 Argument of perigee (°) 345.6...

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Abstract

The invention discloses a satellite attitude control method for space cooperation target tracking imaging. Firstly the conditions required to be met by an imaging time window are determined, and the expected attitude quaternion and angular speed are calculated through the given satellite orbit state and target orbit information so that the error amount between the attitude tracking error quaternion and the actual angular speed and the expected angular speed is calculated; then an attitude kinetic model is established; and finally control law parameters are selected, and the flywheel moment control amount is calculated. The method is based on the attitude quaternion representation so that the possible singularity problem caused by using euler angle in large-angle attitude motion can be avoided. Besides, the method is simple in algorithm, low in calculation amount and simple in project realization and has high pointing control accuracy and great pointing stability.

Description

technical field [0001] The invention relates to a satellite attitude control method in the aerospace field, which provides an attitude control method for video satellites to track and image space cooperation targets, and belongs to the technical field of automatic control. Background technique [0002] Video satellite is a new type of space-based information acquisition micro-satellite that adopts video imaging, real-time transmission of video data, and human-in-the-loop interactive operation. Compared with traditional satellites, video satellites can provide real-time video images, increase time-domain information compared with static single images, can obtain dynamic process information of targets, can detect the occurrence of dynamic events, and can Sequence images are reconstructed to obtain higher-resolution images, providing first-hand information for disaster relief, wartime monitoring, and planning and decision-making. [0003] Space cooperation targets refer to spa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08G05D1/12
CPCG05D1/0808G05D1/12
Inventor 项军华张学阳李泰博曾国强张琦崔凯凯税海涛吴国福李志军袁福高玉东连一君韩大鹏
Owner NAT UNIV OF DEFENSE TECH