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Zhu Y.-H.,Nanjing Southeast University | Cai T.-J.,Nanjing Southeast University | Li C.,Beijing Institute of Space Machine and Electricity | Xu Z.-Y.,Nanjing Southeast University
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2012

In view of the limitations of conventional INS/GNSS integrated navigation method, an orienting technique based on polarized light was studied. First, the atmospheric polarization mode in clear sky was explored, and the ideal atmospheric polarization characteristic was revealed. Second, the principle of polarization navigation sensor was analyzed. In order to change the orientation value measured by polarization sensor to the heading, the calculation equations to determine solar position was derived. At last, the structure of SINS/GPS/Polarized-Light integrated navigation system was designed, and the dynamic simulation was carried out. The simulation results indicate that the system's heading error can be corrected by information from polarization sensor effectively, and the heading accuracy is equivalent to that of polarization sensor. The independent orienting technique based on polarized light can enhance the system's navigation performance and has wide application prospect. Source

Li C.,Beijing Institute of Space Machine and Electricity | Lu Z.-H.,Beijing Institute of Space Machine and Electricity | Huang W.,Beijing Institute of Space Machine and Electricity | Shen C.,Beijing Institute of Space Machine and Electricity
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

Using embedded navigation & control device, double-antenna GPS device, unwire data transporter and big moment direct current electromotor, navigation control software, landing point pre-setting software, remote control & communication software, GPS data converse software was designed independently. Precision fix-point homing parafoil control system which has two working modes of automatic homing and manual remote control was developed. In the automatic homing mode, system controls parafoil approaching the pre-setted target point. And in the manual remote control mode, ground operating person sends remote control instructions to operate parafoil returning using ground control computer. And the control system was validated by association test and load test, respectively. The result indicates that the control system our research provided fulfilled the demand of controllable parafoil fix-point homing. Source

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