Volume 36, Number 6, December 2018
|Page(s)||1185 - 1192|
|Published online||12 March 2019|
WFMHT Method of Orbit Maneuver Detection Based on Space-Based Bearing-Only Measurement
Beijing Aerospace Control Center, Beijing 100094, China
2 Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing 100094, China
The method of orbit maneuver detection of space targets is investigated using the space-based bearing-only measurement, which aims to acquire a real-time or nearly real-time awareness of orbit maneuver in the space situation awareness. First, the model for estimating real-time motion of a space target is presented, which only uses the space-based bearing-only measurements. The innovation characteristics of the normal orbit and orbit maneuver are analyzed and compared. Second, based on the hypothesis test methods of the distribution characteristic of the stochastic sequence, the WFMHT (i.e., weighted fusion of multi hypothesis tests) method with the innovation is put forward to detect the orbit maneuver. Furthermore, the criterion of determining the weight coefficients is studied. Finally, the method is validated by numeric simulations. The results show that the highest gained success rate is up to 36% with the WFMHT method than the prevalent Chi2 method. With the WFMHT method, the detection system achieves a strengthened robustness with greatly shortened detection window. The research will be beneficial to construction of our space situation awareness system.
Key words: space target / orbit maneuver detection / space-based bearing measurement / innovation / weighed fusion / simulations / hypothesis test
关键字 : 空间目标 / 机动检测 / 天基测角 / 新息 / 加权融合
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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