Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Optimal Output Feedback Control Simulation for the Operation of Space Shuttle Main Engine

우주왕복선 액체로켓엔진 작동의 최적출력제어 시뮬레이션

  • Cha, Jihyoung (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Ko, Sangho (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2015.12.10
  • Accepted : 2016.05.01
  • Published : 2016.06.01
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Abstract

This paper deals with an optimal output control for Space Shuttle Main Engine (SSME), a liquid propellant rocket engine using a staged-combustion cycle. For this purpose, we modeled simplified mathematical model of SSME using each SSME component divided into 7 major categories and found trim points called Rated Propulsion Level (RPL). For design the closed-loop system of SSME, we designed optimal output feedback Linear Quadratic Regulation (LQR) control system using SSME linearized model under RPL 104% and demonstrated the performance of the controller through numerical simulation.

본 논문에서는 다단 연소방식의 액체로켓엔진인 우주왕복선 주 엔진(Space Shuttle Main Engine, SSME)의 제어 알고리즘을 다룬다. 이를 위해 SSME의 각 구성품들을 기준으로 크게 7가지 분류로 나누어 구성하여 수학적 모델링을 하였으며 순항상태 추력을 기준으로 Rated Propulsion Level (RPL)에 따른 정상상태 작동점을 구하였다. 폐루프 시스템을 위하여 순항상태인 RPL 104% 조건에서의 선형모델을 이용하여 최적 출력피드백 LQR 제어기 설계를 하였으며 시뮬레이션을 통해 제어기의 성능을 검증하였다.

Keywords

References

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