Time filter

Source Type

Zhou Q.,National Key Laboratory on Flight Vehicle Control Integrated Technology | Zhou Q.,AVIC Xian Flight Automatic Control Research Institute | Yue Y.-Z.,National Key Laboratory on Flight Vehicle Control Integrated Technology | Yue Y.-Z.,AVIC Xian Flight Automatic Control Research Institute | And 4 more authors.
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2014

The indirect grid inertial navigation elements based on wander azimuth mechanization for transpolar flight is presented. First of all, the direction cosine matrix (DCM) from the wander frame to the grid frame is derived. The DCM allows the grid heading and grid velocity be obtained indirectly from wander navigation parameters in high latitude regions, while the heading and velocity are in the manner of truth north heading and geographical velocity from wander navigation parameters in low latitude regions. The earth-centered earth-fixed coordinates can be indirectly calculated and directly applicable to aircraft positioning as an alternative to the use of longitude-latitude coordinates in the Polar Regions. Simulation results show that the navigation performance is the same as the direct grid mechanization. The presented approach can solve the polar navigation problems, and the inner mechanization is the same in precision as low latitude inertial navigation elements.


Liu H.-Y.,Nanjing University of Aeronautics and Astronautics | Yue Y.-Z.,National Key Laboratory on Flight Vehicle Control Integrated Technology | Yang Y.-J.,Nanjing University of Aeronautics and Astronautics | Jiang D.-J.,Nanjing University of Aeronautics and Astronautics
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2012

In the integrity monitoring for Global Navigation Satellite System (GNSS), the normal Receiver Autonomous Integrity Monitoring (RAIM) greatly depends on the constellation geometry and doesn't have sufficient availability. Aimed at this problem, a GNSS integrity monitoring method aided by inertial based on Multiple Solution Separation (MSS) is presented. Based on RAIM method using parity vector and its availability analysis, the tightly integrated navigation system of GNSS/Inertial based on MSS is designed. The calculation method of integrity monitoring and availability for GNSS/Inertial system is deduced. By establishing simulation system, the simulation results for MSS vs. RAIM method were implemented including availability, step failure detection and ramp failure detection and so on. The results show that, by using MSS method, a failure can be fixed even only five satellites are available, the HPL can be reduced by 50 m, and the detect time can be reduced by 71 s.


Li S.-H.,Northwestern Polytechnical University | Li S.-H.,National Key Laboratory on Flight Vehicle Control Integrated Technology | Liu Y.,Northwestern Polytechnical University | Liu Y.,National Key Laboratory on Flight Vehicle Control Integrated Technology | And 4 more authors.
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2013

An inertial measurement aided GPS spoofing detection technique is proposed based on carrier phase double difference observations according to the variation of propagation direction of the spoofing signals and the authentic ones. According to the characteristics of the spoofing signals, the carrier phase double difference equation is obtained. Given the attitude information from INS, this paper analyzes and establishes the relationship between the carrier phase double differences with the receiver's antenna baseline vector. The difference between the predicted and measured carrier phase double differences is used as the test static for spoofing detection. The analysis on detection probability is made from the aspect of fault detection, which shows that when the predicted carrier phase double difference reaches 0.3 cycles, the detection probability of 99.99% can be obtained within a single epoch on the assumption that the false alarm rate is 0.01. Finally, the simulation verifies the effectiveness of this technique.

Loading National Key Laboratory on Flight Vehicle Control Integrated Technology collaborators
Loading National Key Laboratory on Flight Vehicle Control Integrated Technology collaborators