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가정용 고분자전해질 연료전지 공기공급시스템의 모델 기반 고장 검출 기술
원진연,김민진,이원용,최윤영,홍종섭,오환영 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.6
Recently, as the supply of residential polymer electrolyte membrane fuel cells (PEMFCs) increases, the durability and lifetime of the PEMFC system are becoming important. The related studies have been mainly focused on the durability and lifetime of materials while the research on the durability and maintenance of the system level is insufficient. In this paper, a model-based fault detection method is developed considering an air supply system that is dominant to the system performance and efficiency. A commercial 1 kW residential fuel cell system is built, and experiments are conducted under various operation loads and states (normal, 6 faults). From the experimental data, nominal models and residuals are generated. With the residual pattern obtained from real-time data, the detection and classification of various faults can be possible. The technical importance of this paper is to minimize extra sensor installation by using the empirical model rather than a complex mathematical model, and to decrease the number of models by using the applicable model at three loads. Finally, the model-based fault detection method for the air supply system of a PEMFC is established and is expected to be applicable to other subsystems.
EMB의 Closed-Loop 시스템을 위한 모델기반 고장검출 알고리즘 개발
황우현(Woohyun Hwang),허건수(Kunsoo Huh),김명준(Myoungjune Kim),김주곤(Joogon Kim),구본경(Bongyeong Koo) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Faults in dynamic systems refer to unintended and unplanned deviations from the acceptable system behavior due to changes in system parameters or other reasons. The importance of the fault detections and isolation the faults are unavoidable especially when we are working with EMB systems. This paper presents a method to detect the sensor faults in the EMB closed-loop control systems by introducing the model-based approach. The paper first describes the EMB model for Clamping brake force and then EMB fault detection algorithm is developed for sensor faults based on the analytic redundancy method. The performance of the proposed model-based fault diagnosis system is verified in simulations in various faulty cases.
한규홍(Kyuhong Han),김지환(Jihwan Kim),김현섭(Hyunsup Kim),박태호(Taeho Park),김지훈(Jihun Kim),홍정호(Jeongho Hong),이형철(Hyeongcheol Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This paper presents the fault detection and isolation (FDI) strategy for a parallel hybrid electric vehicle (HEV). The powertrain of the target parallel HEV consists of an internal combustion engine, an integrated starter and generator (ISG), a traction motor, an ISG belt as a pulley system and an engine clutch between the engine and the traction motor. In this study, the model-based FDI algorithm for the current and the angle sensors in the ISG and the traction motor is developed. In the supervisory controller, another FDI algorithm is also developed through structural analysis of the ISG belt and the engine clutch. This FDI algorithm utilizes a powertrain model composed of five sub-models: the ISG, the ISG belt, the engine, the engine clutch and the traction motor. For the fault detection, analysis of the signal fluctuation during the faulty situation is performed for different scenarios. For getting the computer simulation results of the developed FDI strategy, the powertrain model and the controller of the target parallel HEV are developed to simulate the proposed FDI strategy. Validity and effectiveness of the proposed FDI strategy is shown by the simulation results.
편로드 유압실린더 내부 누유 검출을 위한 T—S 퍼지 모델 기반 샘플치 관측기 설계
지성철(Sung Chul Jee),김효곤(Hyogon Kim),박정우(Jeongwoo Park),이문직(Mun-Jik Lee),강형주(Hyungjoo Kang),이지홍(Ji-Hong Li) 한국해양공학회 2016 韓國海洋工學會誌 Vol.30 No.5
This paper presents an internal oil leakage detection problem for a hydraulic single-rod cylinder. We derive the dynamics of the hydraulic cylinder as a state space model, and then design a T—S fuzzy model-based fault detection observer. We adopt an H<SUB>∞</SUB> observer design scheme so that the observer is robust against disturbance and relatively sensitive to the leakage fault. Sufficient design conditions are derived in the form of linear matrix inequalities. A numerical example is provided to verify the proposed techniques.
이원용,박구곤,손영준,김승곤,김민진 한국수소및신에너지학회 2017 한국수소 및 신에너지학회논문집 Vol.28 No.3
Fuel cell systems have to satisfy acceptable operating reliability, sufficient lifetime and price to enter the market in competition with existing products. Fuel cells are made up of complex element technologies and various problems related to the failure of the components can affect the reliability and safety of the system. This problem can be overcome by introducing a monitoring and supervisory control system in addition to automatic control to detect the failure of the fuel cell quickly and properly diagnose the performance degradation. For the fault detection and diagnosis of polymer electrolyte fuel cells, the model based method using the theoretical superposition value and the non-model based method of checking the signal tendency or the converted signal characteristic can be applied. The methods analyzed in this paper can contribute to the development of integrated monitoring and control technology for the whole system as well as the stack.