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A Study of Attitude Control and Stability Analysis Using D-Decomposition Stability Area Technique for Launch Vehicle

안정성 영역(Stability Area) 판별법을 이용한 발사체 자세제어 이득 설계 및 자세 안정성 분석

  • 박용규 (한국항공우주연구원 발사체연구본부) ;
  • 선병찬 (한국항공우주연구원 발사체연구본부) ;
  • 노웅래 (한국항공우주연구원 발사체연구본부) ;
  • 오충석 (한국항공우주연구원 발사체연구본부)
  • Published : 2009.06.01

Abstract

This paper concerns analysis technique on determining of attitude control gain in the low frequency region using stability area. The stability area is defined by the D-Decomposition method, which was designed by Neimark. In this paper, it is introduced D-Decomposition method from reference paper and design attitude control gain of generic launch vehicle during first stage flight phase. For selecting PD control gain, it is considered the system parameter uncertainty about whole first-stage flight phase, represented the stability area boundary on each case. After deciding the PD control gain using stability area method, it is applied to launch vehicle linear model, and checking the stability margin requirement, frequency response characteristics.

본 논문에서는 안정성 영역 판별법(stability area) 기반 발사체의 자세제어기 이득결정과정에 대한 내용을 기술하였다. 안정성 영역 판별법은 D-Decomposition 기법으로부터 정의되는 것으로 본 논문에서는 D-Decomposition 기본 이론과 이로부터 산출된 발사체의 자세 안정성 영역을 도시하고, 적용 예로써 일반적인 발사체의 1단 추력 비행구간에서 자세제어기 설계과정을 제시하였다. 제어이득 결정을 위해서 중첩된 안정성 영역을 바탕으로 시스템 파라미터 불확실성을 고려 안정성 영역 경계(stability area boundary)를 설정하고, 선정된 제어이득을 발사체 선형모델에 적용, 자세 안정성 분석 수행 결과를 나타냈다.

Keywords

References

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Cited by

  1. Stage Separation Analysis of Launch Vehicle Using Monte Carlo Simulation vol.43, pp.4, 2015, https://doi.org/10.5139/JKSAS.2015.43.4.341