Accurate estimation for the angular velocity parameters of non-cooperative space targets is the key to ensuring the success of on-orbit capture and docking of servicing satellites,and is one of the most important technologies for space on-orbit services and space debris removal.In the case of short and medium distances,this paper proposes an angular velocity estimation method based on image plane projection geometry according to the motion theorem and periodic relationship between the spatial non-cooperative targets and their geometric projection points in the respective coordinate systems.The method only uses a monocular camera and does not need to know the relative pose to solve the angular velocity of the target,which is simple in implementation and lightweight in structure.In this paper,firstly,the motion theorem of the non-cooperative target in three-dimensional space and its projection point in the image plane is analyzed,and then the LSD line feature is extracted by the monocular camera for inter-frame matching and verification of the feature,and the tracking of the projection point is completed.The periodic relationship of the spin motion can be obtained to solve the angular velocity.The experiment uses the SOHO satellite provided by NASA's official website to simulate the uniaxial spin motion on the real industrial turntable.The results show that the projected geometric estimation method proposed in this paper can obtain high-precision angular velocity in the absolute error range of 0.11deg/s and the relative errorof 2.7%.
DONG Zhen-yu
. Measurement Method of Spin Parameters for Non-Cooperative Targets Independent of Pose[J]. Journal of Space Science and Experiment, 2022
, 22(2)
: 1
-10
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DOI: 10.19963/j.cnki.2096-4099.2022.02.001
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