대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제40권1호
  • /
  • Pages.39-45
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  • 2016
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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차량용 연료전지 냉각시스템 제어 알고리즘 특성 연구

Control Algorithm Characteristic Study of Cooling System for Automotive Fuel Cell Application.

  • Han, Jae Young (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.) ;
  • Park, Ji Soo (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.) ;
  • Yu, Sangseok (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
  • 투고 : 2015.07.13
  • 심사 : 2015.11.20
  • 발행 : 2016.01.01
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초록

차량용 연료전지의 부하 변동시 열관리는 성능과 내구성에 직결되기 때문에 매우 중요하다. 본 연구에서는 작동 부하 조건 내에 온도를 유지할 수 있도록 하기 위한 열관리 시스템용 선형 상태 궤환 제어기를 설계하였다. 차량용 연료전지 열관리 모델은 레저버, 라디에이터, 바이패스 밸브, 팬 그리고 냉각수 펌프 등으로 구성하였으며, MATLAB/SIMULINK$^{(R)}$으로 개발하였다. 시스템 모델의 비선형성으로 인해, 부하 조건 $0.5A/cm^2{\sim}0.7A/cm^2$ 에서 온도 제어 지령을 정상적으로 달성하기 위해 PWM(Pulse Width Modulation)과 수정된 상태 궤환 제어기를 적용하였고 제어 알고리즘의 성능은 ITAE(Integral time weighted error)로 평가하였다. 수정된 상태 궤환 제어기가 저 부하 구간에서 다른 알고리즘에 비해 더 효율적으로 온도를 제어하는 것을 확인하였다.

Thermal management of a fuel cell is important to satisfy the requirements of durability and efficiency under varying load conditions. In this study, a linear state feedback controller was designed to maintain the temperature within operating conditions. Due to the nonlinearity of automotive fuel cell system, the state feedback controller results in marginal stable under load condition from $0.5A/cm^2$ to $0.7A/cm^2$. A PWM (Pulse Width Modulation) and the modified state feedback controller are applied to control the temperature under the load condition from $0.5A/cm^2$ to $0.7A/cm^2$. The cooling system model is composed of a reservoir, radiator, bypass valve, fan, and a water pump. The performance of the control algorithm was evaluated in terms of the integral time weighted absolute error (ITAE). Additionally, MATLAB/SIMULINK$^{(R)}$ was used for the development of the system models and controllers. The modified state feedback controller was found to be more effective for controlling temperature than other algorithms when tested under low load conditions.

키워드

참고문헌

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피인용 문헌

  1. Temperature Control for Proton Exchange Membrane Fuel Cell based on Current Constraint with Consideration of Limited Cooling Capacity vol.17, pp.5, 2017, https://doi.org/10.1002/fuce.201700001