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Anomaly detection based on telemetry data can improve the operating safety for spacecrafts. Most of the anomaly detection methods in this domain are based on Euclidean distance for similarity measure of monitoring parameters. However, the Euclidean distance has many limitations on telemetry data similarity measure and may affect the detecting performance. Therefore, improved distance measures and...
This paper mainly focused on the Drag free control system design based on the relative motion description. In this paper, the state space description model of the dynamics of the drag free satellite was established. Based on the analysis of controllability and observability, the state feedback control law was designed. Finally, considering the micro thruster configuration and output characteristics,...
For unpredictable failures of in-orbit satellites, a data-based anomaly detection method, which is based on normal historical telemetry data, is proposed to detect in-orbit anomaly with the real-time telemetry data. Firstly, a solar array current prediction model is constructed based on the relationship between the satellite solar array and the sun angle meter. Moreover, a false alarm filtering strategy...
Accurate instrument mounting matrix information is significant for geolocation algorithm to reach a high on orbit geolocation accuracy. In this study, an integrated satellite-ground geolocation error model was proposed, based on which the instrument mounting matrix can be accurately rebuilt. This method has been successfully applied to SNPP ATMS on-orbit geolocation, results show that the geolocation...
CubeSat is a new kind of low cost micro satellites. Until now there are over two hundred CubeSats have been launched for many applications. In the future, CubeSat could be used for asteroid exploration. This paper gives two methods to explore the asteroids by using CubeSat. The first mothod is only use CubeSat for long range asteroid exploration. Another method is to use mother spacecraft to carry...
During the real-time control procedure in the satellite operation, it is very important to judge the status of the satellite swiftly and accurately. However, current monitor methods are unsuitable to the complex control procedures, and the professional engineers are responsible for judging the changing states by themselves. To judge the behavior of the commanded satellite automatically, a real-time...
This paper presents an approach to improve the stability of three-axis stabilized satellite with rotating payloads from a disturbance identification perspective. Based on steady-state output-only and the system transfer function, the unknown external and internal disturbance torques are identified in a closed loop without persistent excitation. The modified eigensystem identification algorithm (ERA)...
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