Research On Orientation Determination Technology Using Bi-Satellite System Based On Carrier Phase Interferometry

This dissertation performs systematic research on carrier phase interferometric orientation determination based on Chinese"Beidou No.1"Bi-Satellite System. Its main contributions include the following several aspects:Firstly, the dissertation constructs the mathematic model of short baseline orientation determination using two geostationary satellites and analyses the applicable conditions of carrier phase interferometry. Orientation determination precision is analysed in depth through both the conventional linearized method and Monte-Carlo computer simulation method, and the mathematical simulation results show that the linearized method has the shortcoming of fairly low elevation error analysis precision in high latitude area so as not to be very appropriate there. By analyzing the definite factors influencing orientation precision, the dissertation develops the concept of Orientation Dilution Of Precision, which uncovers the internal cause of exotic error behavior of Bi-Satellite orientation, and has important guiding significance for practical engineering applications.Secondly, through orientation key technique comparison with the multi-satellite system such as GPS, etc., the work points out ambiguity resolution difficulty of Bi-Satellite orientation determination. After analyzing the existing ambiguity resolution methods the dissertation investigates the baseline rotation method based on the antenna-swap idea, and develops the fixed axis rotation maximum-minimum method—FARMM and the equivalent rotation maximum-minimum method—ERMM applicable for static basement and moving vehicle respectively. The former lowers the demands on rotation device while the latter improves the flexibility of antennae installation. Meanwhile the dissertation also brings forward an ambiguity function search method which needs only one single epoch data with the outer aided information, and investigates the accuracy requirements for the assistant pointing information.Thirdly, based on the thought of motion-based ambiguity resolution, a Bi-Satellite attitude determination method using non-planar baselines is developed making full use of the satellites'geostationary property. Focused on movement mode demands, the dissertation brings forward a method by large angle yawing movement accompanied with small angle pitch vibration to efficiently solve the rank deficiency problem of vehicle planar motion. The mathematical simulation results indicate that the above developed method can realize ambiguity initialization within 30 seconds(1Hz data rate provided) with above 97 percent success rate as long as the pitch angle motion magnitude of vehicle is not less than 5°, and yield real time attitude resolution precision of 0.0742°in yaw, 0.0671°in pitch, and 0.0867°in roll using the antennae array with...