Jiongqi Wang

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The improvement of the detection and diagnosis capability for the unanticipated fault is a tendency in the research and application of fault diagnosis. In this paper, some notions and the basic principles for the unanticipated fault detection and diagnosis are given. A general process model applied to the diagnosis for the unanticipated fault is designed,(More)
The star sensor has been widely used as an important and accurate attitude measurement sensor in classical satellite attitude determination systems. This paper analyses the influence of star sensor's sampling frequency on attitude determination accuracy within an Extended Kalman filter (EKF). Simulations are used to validate the theoretical analysis and(More)
For many applications the single-frequency stand-alone GPS receiver operating in single point positioning mode is still the preferred choice because of its relative simplicity, low cost and robustness. This is especially the case for spaceborne applications. However it is well known that single epoch positioning accuracy in stand-alone mode is not very high(More)
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