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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Development of a Control Law to Pneumatic Control for an Anti-G Suit

Anti-G 슈트 공압 제어를 위한 제어법칙 개발

  • Received : 2014.12.10
  • Accepted : 2015.04.02
  • Published : 2015.06.01
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Abstract

The highly maneuverable fighter aircraft such as F-22, F-16 and F-15have the high maneuverability to maximize the combat performance, whereas the high maneuver characteristics might degrade the pilot's mission efficiency due to fatigue's increase by exposing him to the high gravity and, in the worst case, the pilot could face GLOC (Gravity-induced Loss Of Consciousness). The advanced aerospace company has applied the various technologies to improve the pilot's tolerance to the gravity acceleration, in order to prevent the pilot from entering the situation of the loss of consciousness. Especially, the Anti-G Suit(AGS) equipment to protect the pilot against the high gravity in flight could improve the mission success rate by decreasing the pilot's fatigue in the combat maneuver as well as prevent the pilot from facing GLOC. In this paper, a control algorithm is developed and verified to provide an optimal air pressure to AGS according to the gravity increase during the high performance maneuver. This result is expected, as the key technology, to contribute to the KF-X(Korean Fighter eXperimental), project in the near future.

F-22, F-16 및 F-15와 같은 고성능 전투기는 전투성능의 극대화를 위해 고기동성(highly maneuverable)을 보유하고 있다. 이로 인해 고기동 시에 조종사는 고중력가속도(high gravity acceleration)에 노출되고 피로도(fatigue)의 증가로 임무효율의 저하가 발생하며, 심할 경우에는 의식상실(Gravity-induced Loss Of Consciousness, GLOC)에 직면할 수 있다. 선진 항공업체에서는 조종사가 고중력가속도에 견딜 수 있는 내성을 향상시켜 의식상실에 진입하는 것을 방지하는 다양한 기술을 항공기에 적용하고 있다. 특히, 가속도방호복(Anti-G Suit)은 GLOC으로 인한 의식 상실을 방지할 수 있을 뿐만 아니라, 전투 기동 시에 조종사의 피로를 감소시킴으로써 임무성공률을 향상시킬 수 있다. 본 논문에서는 초음속 고등훈련기 모델을 기반으로 하여 고기동 시에 중력가속도의 증가에 따라 AGS에 최적의 공기압을 제공할 수 있는 제어알고리즘을 개발하고 검증하였다. 이러한 결과는 추후에 체계개발이 진행될 한국형전투기개발사업(Korean Fighter eXperimental, KF-X)에서 핵심기술을 개발하는데 기여하리라 기대한다.

Keywords

References

  1. C. S. Kim, B. M. Hwang, G. O. Koh, and M. H. Bae, "A study on longitudinal control law in order to improvement of T-50 fine tracking performance," Journal of The Korea Society for Aeronautical and Space Science, vol. 33, no. 8, pp. 50-55, 2005. https://doi.org/10.5139/JKSAS.2005.33.8.050
  2. C. S. Kim, B. M. Hwang, and S. J. Kim, "A study on the longitudinal flight control law of T-50," Journal of Control Automation and System Engineering, vol. 11, no. 11, Nov. 2005.
  3. C. S. Kim, B. M. Hwang, and Y. S. Kang, "A study on the flight control law and the dynamic characteristic about variation of feedback gains of T-50 lateral-directional axis," Journal of Control Automation and System Engineering, vol. 12, no. 7, July 2006.
  4. John D. Howard, Ann M. Johnston "Loss-of-consciousness and spatial disorientation auto-recovery system," IEEE, 1986.
  5. William B. Albery and Robert E. Van Patten, "Development of a Gravity Induced Loss-of-Consciousness(GLOC) Monitoring System," IEEE, 1990.
  6. W. B. Albery and R. E. Van Patten, "Development of a gravity induced loss-ofconsciousness (GLOC) monitoring system," IEEE, 1990.
  7. W. B. Albery, M. N. Khomenko, and M. C, "Differences in pilot automation philosophies in the US and russian air force ground collision avoidance systems," RTO HFM Symposium, RTO-MP-088, 7-9, Oct. 2002.
  8. Lisher, B.J. and D.H Glaister, "The Effect of Acceleration and Seat Back Angle on Performance of a Reaction Time Task," Flying Personnel Research Committee, March 1978.
  9. Shubrooks, S.J., Jr., and S.D Leverett, Tr., "Effect of the Valsalva Maneuver on Tolerance to +Gz Acceleration," Appl. Physiol., 34(4): 460-466, 1973. https://doi.org/10.1152/jappl.1973.34.4.460
  10. Khalid W. Barazanji and Kuldip S. Rattan, "Design and Analysis a Closed-Loop Controller for an Anti-G Suit," IEEE, 1988.
  11. Van Patten, R.E., T.J. Jennings, W.B., Albery, J.W., Frazier, C. Goodyear, B. Gruesbeck and D. McCollor,, "Development of a bang-bang servo anti-g valve for high performance fighter aircrafts: final resport," AAMRL-TR-85-024.
  12. Detail Specification: Valve, Pressure, Anti-G Suit, High Flow, MIL-DTL-87255(USAF), June, 2008.
  13. L. D. Tripp, Jr., "Enhanced recovery of aircrew from G acceleration induced loss of consciousness (G-LOC): A Centrifuge study," United States Air Force Research Laboratory, Oct. 2001.
  14. McCollor et al., "Flight Activated Anti-G Valve(FAAGV)," United States Patent 5277693, Jan. 11, 1994.
  15. Van Patten, R.E., T.J. Jennings, W.B., Albery, J.W., Frazier, C. Goodyear, B. Gruesbeck and D. McCollor,, "Development of a bang-bang servo anti-g valve for high performance fighter aircrafts:final resport," AAMRL-TR-85-024.
  16. Annicelli Lance, O'Connor Robert, Balldin Ulf, Isdahl Wayne, Werchan Paul, "Evaluation of the joint service mustang anti-g suit," AFRL-HE-BR-TR-2005-0081, May, 2005.
  17. D.H. Glaister, "Protection against long duration acceleration," Butterworths London.
  18. Pecaric M., Buick F., "Determination of a pressure breathing schedule for improving +Gz tolerance," Aviat. Space Environ. pp. 572-578, Med. July 1992.
  19. Larry J. Meeker Grady L. Ripley, John H. Olhausen, "System Test Results of the Advanced Technology Anti-G Suit (ATAGS)," Crew Technology Division, Armstrong Laboratory, Brooks Air Force Base, Texas 78235-5 104, November 1992.
  20. Robert E. Simpson, John Ohlhausen, "Advanced Technology Anti-G Suit(ATAGS), Fabrication," KRUG Life Sciences, San Antonio Division, 405 West Nakorma, San Antonio, TX 78216, December 1990
  21. Maj. Daniele Picco, "THE EUROFIGHTER@ I.T.I. A.MALIGNANI"
  22. JW BURNS, "G-protection basis/ acceleration physiology," AGARD AMP Lecture Series, May 15-16, 1995.
  23. Hamburg Branch, "New Concepts in Pilot G-Protection," Autoflug GmbH(C), Januay 28. 2010.