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第四届中国卫星导航学术年会

作者： Wei Zhou Jinming Hao Information Engineering University

The precision assessment of the telemetry、track and command （TT＆C）equipment are important to ensure they can work normally. A new method is proposed for precision assessment of the space TT＆C equipment in this paper. In this method, anUnmanned Aerial Vehicle （UAV）equipedwith global positioning system （GPS） receiver acts as the target, well the positioning information of target is obtained by DGPS technology and the Kalman Filtering is used to reduce the effects of disturbance to enhance the positioning accuracy. The precisionof the space TT＆C equipment is obtained through thecomparison of the positioning data by DGPS and the observation by the space TT＆Col equipment. The UAV flightadjusting system is built based on this method in this paper, and the result of flying experiment shows that this system can provide the high-precision standard data, which have many advantages such as strong mobility and wide application scope. This system provides a new efficient solution for precision assessment of space TT＆C equipment, which lays the foundation for the application of BeiDou in the precision assessment field. The precision assessment of the telemetry、track and command （TT＆C） equipment is important to make sure that the equipment can work normally. In this paper, a new method is proposed to assess theprecision of the space TT＆C equipment. In this method, an Unmanned Aerial Vehicle （UAV） equipped with a global positioning system （GPS） receiver acts as the target, the positioning information of target is obtained by DGPS technology and the Kalman Filtering is used to reduce the effects of disturbance to enhance the positioning accuracy. The precision of the space TT＆Col equipment is obtained through comparing the positioning data of DGPS and the observation of the space TT＆C equipment. An UAV flight adjusting system is built based on this method in this paper, and the result of flying experiment shows that this system gives high-precision standard data, which have many adv

关键词： unmanned aerial vehicle precision assessment space TT&C GPS kinematic positioning flightadjusting

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A Comprehensive Method for Evaluating precision of Transfer Alignment on a Moving Base

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Journal of Marine Science and Application 2017年第3期16卷 344-351页

作者： Hongliang Yin Bo Xu Dezheng Liu China Ship Research and Development Academy Beijing 100192 China Department of precision Instrument Tsinghua University Beijing 100084 China Sckool of Automation Harbin Engineering University Harbin 150001 Ckina

In this study, we propose the use of the Degree of Alignment(DOA) in engineering applications for evaluating the precision of and identifying the transfer alignment on a moving base. First, we derive the statistical formula on the basis of estimations. Next, we design a scheme for evaluating the transfer alignment on a moving base, for which the attitude error cannot be directly measured. Then, we build a mathematic estimation model and discuss Fixed Point Smoothing(FPS), Returns to Scale(RTS), Inverted Sequence Recursive Estimation(ISRE), and Kalman filter estimation methods, which can be used when evaluating alignment accuracy. Our theoretical calculations and simulated analyses show that the DOA reflects not only the alignment time and accuracy but also differences in the maneuver schemes, and is suitable for use as an integrated evaluation index. Furthermore, all four of these algorithms can be used to identify the transfer alignment and evaluate its accuracy. We recommend RTS in particular for engineering applications. Generalized DOAs should be calculated according to the tactical requirements.

关键词： transfer alignment precision assessment degree of alignment Kalman smoothing returns to scale moving base,engineering applications comprehensive method

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