Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

A Fault Management Design of Dual-Redundant Flight Control Computer for Unmanned Aerial Vehicle

무인기용 이중화 비행조종컴퓨터의 고장관리 설계

  • Received : 2022.02.15
  • Accepted : 2022.03.18
  • Published : 2022.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Since the flight control computer of unmanned aerial vehicle (UAV) is a flight critical equipment, it is necessary to ensure reliability and safety from the development step, and a redundancy-based fault management design is required in order to operate normally even a failure occurs. To reduce cost, weight and power consumption, the dual-redundant flight control system design is considered in UAV. However, there are various restrictions on the fault management design. In this paper, we propose the fault detection and isolation designs for the dual-redundant flight control computer to satisfy the safety requirements of an UAV. In addition, the flight control computer developed by applying the fault management design performed functional tests in the integrated test environment, and after performing FMET in the HILS, its reliability was verified through flight tests.

무인항공기의 비행조종컴퓨터는 비행 안전에 필수적인 장비로써 개발 단계에서부터 신뢰성과 안전성의 확보가 필수적이며, 고장 발생 시에도 정상적으로 기능을 수행할 수 있는 다중화 기반의 고장관리 설계가 요구된다. 무인기의 경우에는 비용, 무게, 전력소모 등을 감소하기 위하여 비행조종시스템의 이중화 설계를 고려하지만, 고장관리를 위한 고장 검출 및 분리 설계에 많은 제약이 있다. 본 논문에서는 무인기용 이중화 비행조종컴퓨터의 신뢰성을 향상시키기 위한 고장 검출 및 고장 분리를 위한 고장관리 설계 방안을 제안한다. 그리고 고장관리 설계를 적용해 개발한 비행조종컴퓨터는 통합시험환경에서 기능 시험을 수행하고 HILS 환경에서 고장 영향성 확인 시험을 수행한 후 무인기에 탑재하여 비행시험을 통해 그 신뢰성을 검증하였다.

Keywords

References

  1. Chang, W., Lee, S. K., Kim, Y. G. and Oh, T. G., "Autonomous Mission Management Software Design and Verification Technique for Unmanned Aerial Vehicles," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 49, No. 6, 2021, pp. 505~513.
  2. Kim, Y. G., Chang, W. H., Kim, K. M. and Oh, T. G., "Development of an Autonomous Situational Awareness Software for Autonomous Unmanned Aerial Vehicles," Journal of Aerospace System Engineering, Vol. 15, No. 2, 2021, pp. 36~44. https://doi.org/10.20910/JASE.2021.15.2.36
  3. Oh, T. G. and Yoon, H. S., "Development of Operational Flight Program for Dual-redundant Flight Control System of Unmanned Aerial Vehicle," Proceeding of the Korean Society for Aeronautical and Space Sciences Fall Conference, 2016, pp. 1276~1277.
  4. Nam, Y. H., Joo, J. Y. and Jang, S. H., "Development of Dual-Redundant Flight Control computer for Tilt Rotor UAV," Proceeding of the Korean Society for Aeronautical and Space Sciences Spring Conference, 2013, pp. 1196~1199.
  5. Yoon, H. S. and Kim, Y. G., "A Study on Software Based Fault-Tolerance Techniques for Flight Control Computer," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 44, No. 3, 2016, pp. 256~265. https://doi.org/10.5139/JKSAS.2016.44.3.256
  6. Kim, Y. T., Yoo, H., Choi, I. H. and Park, M. H., "Study on a AFCS OFP Development plan of Domestic Small Helicopter for System Impact Minimization," Proceeding of the Korean Society for Aeronautical and Space Sciences Spring Conference, 2013, pp. 882~887.
  7. Han, J. P. and Yoon, H. S., "Development of Triplex Flight Control Computer for Unmanned Aerial Vehicle," Proceeding of the Korea Institute of Military Science and Technology Conference, 2013, pp. 1465~1466.
  8. Zhang, X., Li, H. and Yuan, D., "Dual Redundant Flight Control System Design for Microminiature UAV," 2015 2nd International Conf. on Electrical Computer Engineering and Electronics, 2015, pp. 785~791.
  9. Fourlas, G. K. and Karras, G. C., "A Survey on Fault Diagnosis and Fault-Tolerant Control Methods for Unmanned Aerial Vehicles," Machines, 2021.
  10. Liu, B., Wu, J., Yao, L. and Ding, Z., "Ontology-based Fault Diagnosis : A Decade in Review," Proceeding of the 11th International Conference on Computer Modeling and Simulation, 2019, pp. 112~116.
  11. Azadmanesh, A., Farahani, A. and Najjar, L., "Fault Tolerant Weighted Voting Algorithms," International Journal of Network Security, Vol. 7, No. 2, 2008, pp. 240~248.
  12. Kim, S. S. and et al, "Verification of "Dual-master" Duplication Flight Control System using Simulink Virtual Module," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 36, No. 9, 2008, pp. 867~873. https://doi.org/10.5139/JKSAS.2008.36.9.867
  13. Loegering, G., "Another Approach to Dual-Redundancy-The Global Hawk Experience," AUVSI, 2000.
  14. Loegering, G. and Evans, D., "The Evolution of The Global Hawk & Mald Avionics Systems," Proceedings of the 18th Digital Avionics Systems Conference, October 1999.
  15. Park, S. H., Kim, J. Y., Cho, I. J. and Hwang, B. M., "Redundancy Management Design for Triplex Flight Control System," The Korean Society for Aeronautical and Space Sciences, Vol. 38, No. 2, 2010, pp. 169~179. https://doi.org/10.5139/JKSAS.2010.38.2.169
  16. MIL-HDBK-470A, Designing and Developing Maintainable Products and Systems, DOD Handbook, 1997.
  17. Han, J. P. and Yoon, H. S., "Fault-tolerant apparatus and method in multi-computer for Unmanned Aerial Vehicle," Korea Patent, 10-1448013, 2014.
  18. Lee, G. H., Hur, G. B. and Kim, Y. K., "Development of Integrated Monitoring Software and Processor Interface as Tools for Verification and Validation of Operational Flight Program in Flight Control Computer," Proceeding of the Korean Society for Aeronautical and Space Sciences Fall Conference, 2007, pp. 1175~1178.
  19. Han, J. P. and Yoon, H. S., "Research on Software Integration Test Procedure and Result of Integrated Management Computer of Unmanned Aerial Vehicle," Proceeding of the Korean Society for Aeronautical and Space Sciences Spring Conference, 2015, pp. 638~641.
  20. IEEE-ISO, The Nexus 5001 Forum Standard for a Global Embedded Processor Debug Interface, Version 3.0, 2012.