Method for determining relative position of planetary probe in process of approaching target
A technology of relative position and determination method, which is applied in the directions of measuring devices, instruments, surveying and navigation, etc., and can solve the problems of low relative orbit determination accuracy and poor autonomy.
Inactive Publication Date: 2013-02-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0005] The purpose of the present invention is to provide a method for determining the relative position of the planetary probe in the process of approaching the target in order to solve the problems of poor autonomy and low relative orbit determination accuracy of the existing navigation methods for the approaching section of deep space probes
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[0020] In order to better illustrate the purpose and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] In this embodiment, the process of the planetary probe approaching the target celestial body is as follows: figure 2 As shown, the process flow of the relative position determination method in the process of the planetary probe approaching the target is as follows figure 1 As shown, it specifically includes the following steps:
[0022] Step 1, determine the relative velocity vector of the planetary probe relative to the target celestial body before the implementation of the approach mission Its relative velocity value is v. In this embodiment, the moment when the planetary probe is 10 kilometers away from the target celestial body is taken as the start time t of the approach mission 0 , the relative velocity vector at this moment is measured by the g...
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The invention relates to a method for determining a relative position of a planetary probe in process of approaching a target and belongs to the technical field of autonomous navigation. The method comprises the following steps of: releasing a radio beacon through the planetary probe in the process of approaching a target celestial body according to a specific speed, measuring the distance data between the radio beacon and the planetary probe, and determining the position of the probe relative to the target celestial body by combining the measuring data of a unit vector of the probe relative to the position of the target celestial body extracted by an optical sensor carried by the planetary probe. According to the method, an orbit of the probe relative to the target celestial body can be autonomously determined in the approaching process, and the method is small in calculation mount, easy and convenient; and meanwhile, because the measuring information of the accompanying radio beacon is imported, optical measurement observation configuration through a pure target celestial body can be improved, and the orbit determination precision of the probe relative to the target celestial body is improved.
Description
technical field [0001] The invention relates to a relative position determination method in the process of a planet probe approaching a target, and belongs to the technical field of autonomous navigation. Background technique [0002] With the increasing number of interplanetary exploration missions, probes flying over, orbiting and softly landing on target celestial bodies have become important tasks and topics for future deep space scientific exploration. In order to successfully complete the mission of scientific exploration, the relative orbit determination of the probes in the approach segment must have very high precision, so that the probes can reach the target celestial body at the desired position. The navigation accuracy of the detector in the approach segment is closely related to the type of information measured by the detector, the accuracy of the measurement data, and the uncertainty of the detector's dynamic model and observation model. The design of the navi...
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Inventor 朱圣英崔平远高艾徐瑞于正湜胡海静
Owner BEIJING INSTITUTE OF TECHNOLOGYGY