Obstacle Awareness and Collision Avoidance Radar Sensor System for Smart UAV

Kwag, Young K.;Hwang, Kwang Y.;Kang, Jung W.

  • Published : 2005.12.31


In this paper, the critical requirement for obstacle awareness and avoidance is assessed with the compliance of the equivalent level of safety regulation, and then the collision avoidance sensor system is presented with the key design parameters for the requirement of the smart unmanned aerial vehicle in low-altitude flight. Based on the assessment of various sensors, small-sized radar sensor is selected for the suitable candidate due to the real-time range and range-rate acquisition capability of the stationary and moving aircraft even under all-weather environments. Through the performance analysis for the system requirement, the conceptual design result of radar sensor model is proposed with the range detection probability and collision avoidance mode is established based on the time-to-collision, which is analyzed by collision scenario.



  1. Tarak Gandhi and et al., 2001, 'Detection of Obstacles in the Flight Path of an Aircraft', IEEE Tr., AES vol. 39, no. 1, pp. 176-191
  2. Anthony Mangogno and et al., 2001, 'Development of a Helicopter Obstacle Detection and Air Data', IEEE 20th Digital Avionics Conference, vol. 1, pp. 1-18
  3. B. Kumar and D. Ghose, 2001, 'Radar-Assisted Collision Avoidance /Guidance Strategy for Planar Flight', IEEE Tr. AES. Vol. 37, No. 1, pp. 77-90
  4. Russel Wolfe, 2003, 'Non-Cooperative Collision Avoidance Flight Test Results & Analysis', European UVS Tech 2003 Conference
  5. Williamson T., Spencer N.A., 1989, 'Development and operation of the Traffic Alert and Collision Avoidance System (TCAS)', Proceedings of the IEEE, vol. 77 , pp. 1735-1744
  6. Young K Kwag, 2004, 'Obstacle Awareness and Collision Avoidance Radar sensor System for Low-Altitude Flying Smart UAV', the Proceeding of IEEE the 23rd DASC, Salt Lake City, Oct. 2004
  7. Jung Wan Kang, 2005, 'Collision Avoidance Radar Sensor Design and Performance Analysis for UAV', MS Thesis, School of Avionics and Telecom.. Eng., HanKuk Aviation University, Feb. 2005
  8. Swerling P.,1997, 'Radar Probability of Detection for Some Additional Fluctuating Target Cases', IEEE, Aerospce and Electronic Systems, vol. 33, pp. 698-709
  9. William Morchin, 1993, 'Radar Engineer's Source Book', Artech House