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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Experimental Investigations of Systematic Errors in Wind Tunnel Testing Using Design of Experiments

실험설계법 기반 풍동시험 시스템 오차 검출 실험연구

  • Received : 2013.03.08
  • Accepted : 2013.04.25
  • Published : 2013.05.01
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Abstract

The variation of systematic bias errors in the wind tunnel testing has been studied. A Design of Experiments(DOE) approach to an experimental study of fuselage drag and stability characteristics of a helicopter configuration was applied. When forces and moments measured in one time block differ significantly from measurements made in another time block under assumption that sample observations can be expected to yield same results within permissible measuring errors. The practical implication of this paper is that the systematic error can not be assumed not to exist. The those error reduction could be achieved through the process of randomization, blocking, and replication of the data points.

풍동시험 중에 발생하는 시스템오차의 변동에 관한 연구를 수행하였다. 회전익 항공기의 기체 공력특성 측정실험에 실험설계 방법론이 적용되었다. 풍동시험 중에 발생하는 시스템오차의 변동에 관한 연구를 수행하였다. 허용 실험오차 내에서 항상 동일한 결과를 얻어야 하는 전제조건에도 불구하고 한 개의 실험시간 블록에서 측정된 힘과 모멘트가 다른 시간블록에서 측정된 것과 상당량 다르게 측정되었다. 실험관련 시스템오차는 존재하지 않는다고 임의로 간주해서는 안되며 이러한 오차의 감소는 랜덤화, 블록화 및 반복화 등의 실험설계원리의 적용을 통해 가능하다.

Keywords

References

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  1. Experimental Investigations of Accuracy Improvement in Wind Tunnel Testing Using Design of Experiments vol.42, pp.4, 2014, https://doi.org/10.5139/JKSAS.2014.42.4.291