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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (8): 326789-326789.doi: 10.7527/S1000-6893.2022.26789

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

UAV abnormal behavior detection based on improved iForest algorithm

TANG Li1,3, HAO Peng1,3, REN Peige2, ZHANG Zuyao1,4, HE Xiang1,4, ZHANG Xuejun1,4   

  1. 1. Intelligent Air-Ground Fusion Vehicle and Control Engineering Research Center of the Ministry of Education, Xihua University, Chengdu 610039, China;
    2. National Airspace Management Center, Beijing 100094, China;
    3. School of Automobile and Transportation, Xihua University, Chengdu 610039, China;
    4. School of Aeronautics and Astronautics, Xihua University, Chengdu 610039, China
  • Received:2021-12-09 Revised:2022-03-23 Online:2022-08-15 Published:2022-03-22
  • Supported by:
    National Natural Science Foundation of China (5210120621);Horizontal Scientific Research Fund (RH1900010872)

Abstract: To further improve the control ability of low altitude UAV and break through the key technologies of accurate monitoring of cooperative UAV operation state and rapid judgment of the type of non-cooperative UAV task, a method for UAV abnormal behavior detection is studied. Firstly, the abnormal behaviors in the operation of cooperative and non-cooperative UAVs are defined. The operation parameters of the two types of UAVs are analyzed, and the extraction methods of various operation characteristics and judgment parameters are determined. Then, a UAV type determination method is proposed based on the Sobel Operator-CNN algorithm. Finally, the improved isolated Forest (iForest) algorithm based on the method of dynamic maximum growth height is proposed to distinguish the abnormal behavior of cooperative and non-cooperative UAVs. The task characteristics and abnormal types of UAVs are determined according to data nodes. The results of test based on the ardupilot-airsim experimental platform show that the improved iForest algorithm has the characteristics of fast convergence speed and high accuracy, and abnormal-behavior recognition accuracy of the algorithm is 96.4%, which is 3.2% higher than that of the traditional algorithm.

Key words: UAV monitoring technology, UAV identification and classification, abnormal behavior detection, Sobel Operator-CNN algorithm, improved isolated Forest (iForest) algorithm

CLC Number: