Passive positioning method and error analysis of UAV based on TDOA. Issue 7 (March 2020)

• Record Type: Journal Article
• Authors: Zhang, Di; Li, Changgeng; Zhou, Chao; Ma, Chao
• Is Part Of: IOP conference series. Volume 768:Issue 7(2020)
• Publication Date: 2020-03
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/768/7/072077
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: At present, the phenomenon of "black fly" and "flooding" of drones frequently occurs, which brings various security risks to the country, society and individuals. Aiming at the passive positioning problem of UAV, this paper proposes a method based on TDOA for direct closure to solve the target position.The four-station time difference method is analyzed. The position coordinates of UAV are expressed as a function of the radial distance between the UAV and the main station.Then solve the quadratic equation of the radial distance between the UAV and the main station.Finally, obtain the position coordinates of the UAV by radial distance.According to the distribution of the solution of the quadratic equation, the unique solution zone, the fuzzy solution zone and the non-solution zone are analyzed, and the fuzzy solution is solved. The method of defuzzification is proposed in the area.The positioning error is studied, and three factors affecting the positioning error are discussed: the distance between base stations, the height of the main station and the measurement accuracy of distance difference.The research conclusion has important guiding significance for the station design.