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( Inbeom Jeong ),( Moon Jun Na ),( Ji Woong Son ),( Sun Jung Kwon ) 대한결핵 및 호흡기학회 2015 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.120 No.0
Sulbactam possesses bactericidal activity against Acinetobacter baumanii. But only a few clinical investigations have documented the efficacy of sulbactam. We performed a retrospective case series study to assess the effectiveness of sulbactamin patients with carbapenem-resistant Acinetobacter baumanii(CRAB)-mediated ventilator associated pneumonia(VAP). This study was conducted at the medical intensive care unit of the teaching hospital. Fifty-eight patients with VAP who was treated with piperacillin-sulbactam or ampicillin-sulbactam as a first antibiotic agent for the CRAB was reviewed. The mean ageof the patients was 72.0 ± 15.1 years. The mean acute physiological and chronic health evaluation II score was 21.6 ± 8.6 points. Early clinical improvement was noted in 60.3%, microbiologic improvement of was noted in 55.2%. 15-day mortality rate was as low as 12.1%, but 30-day mortality rate was 29.3%. Early clinical failure(OR: 16.6, CI: 3.89~71.43), microbiologic failure(OR: 4.63, CI: 1.35~15.8) radiologic worsening (OR: 3.75, CI: 1.11~12.6) was associated with mortality. There was no life threatening adverse reaction related to sulbactam therapy. Sulbactam can be a excellent treatment option in patients with CRAB-VAP. Nevertheless, early treatment failure was associated with increased mortality, prompt regimen change should be done without delay.
RCP를 통한 PMSM 구동 시스템의 고장 진단 로직 개발
정기윤(Kiyun Jeong),강래청(Raecheong Kang),김세현(Sehyun Kim),양인범(Inbeom Yang) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In the complex electric drive system, abnormal status which is considered at first stage of development are very diverse, difficult to predict and irregular. Therefore, the study of fail-safety technology is required prior to beginning any development. In many cases, failure mode test is not easy to represent in the lab. There are simple forms of failure mode like that wire short, open and complex forms like that abnormal signal of current sensor, position sensor, etc. Test of complex forms is time-consuming, expensive. And there is limitation number of test sample. Then we have to consider alternative method of real hardware test. HIL simulator can make the condition and environment for fault insertion. We will operate real time simulation with dynamic model in HIL simulator. It measures PWM duty ratio and frequency of MCU output signals for operating electric drive model. Even though virtual development environment system can simulate the MCU, in this paper, RCP will replace real hardware. Based on HIL simulator and RCP hardware, we can build virtual development environment for testing MCU performance with normal and failure mode. The research object of this paper is the electric drive system used in electric vehicle. This drive system is composed of PMSM, inverter, battery and controller. In this study, fault diagnosis logic of electric parts is investigated.
정기윤(Kiyun Jeong),김세현(Sehyun Kim),강래청(Rachung Kang),양인범(Inbeom Yang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this paper, Hardware-in-the-Loop Simulation(HILS) is developed for evaluating a motor control unit on the signal level interface, simultaneously implementing a dynamic model of electric motor in real-time. Using Rapid control prototyping(RCP) device to function as MCU, motor controller generates PWM signals to HIL simulator, which runs dynamic models of inverter and electric motor, and receives the sensor signals calculated from those models in that simulator. In addition, the various fault signals from HIL simulator is inserted to RCP. It is expected that HILS can be used in developing and evaluating the control algorithm for MCU on the electric motor simulation.
정기윤(Kiyun Jeong),김세현(Sehyun Kim),강래청(Raecheong Kang),양인범(Inbeom Yang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this paper, the BLDC(Brushless DC) motor control unit(MCU) is evaluated for failure mode by Hardware-in-the-Loop Simulation(HILS) on the signal level interface, simultaneously implementing a dynamic model of electric motor in real-time. The MCU generates PWM signals to HIL simulator, which runs dynamic models of inverter and electric motor, and receives the sensor signals calculated from those models in that simulator. We make the failure signal to the MCU IO interface by HIL simulator and evaluate performance of MCU in the failure mode. It is expected that HILS can be used in developing and evaluating the control algorithm for MCU on the electric motor failure mode simulation.
MCU-HIL Simulation 환경을 이용한 MCU 고장검출 알고리즘 검증 자동화
김세현(Sehyun Kim),정기윤(Kiyun Jeong),강래청(Rachung Kang),양인범(Inbeom Yang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
In this paper, Hardware-in-the-Loop Simulation(HILS) is developed for evaluating a motor control unit on the signal level interface, simultaneously implementing a dynamic model of electric motor in real-time. Using Rapid control prototyping(RCP) device to function as MCU, motor controller generates PWM signals to HIL simulator, which runs dynamic models of inverter and electric motor, and receives the sensor signals calculated from those models in that simulator. In addition, the various fault signals from HIL simulator is inserted to RCP. It is expected that HILS can be used in developing and evaluating the control algorithm for MCU on the electric motor simulation.
황윤형(Yunhyoung Hwang),남찬혁(Chanhyuk Nam),양인범(Inbeom Yang),정기윤(Kiyun Jeong) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper describes the development and validation of in-wheel vehicle simulation model based on the commercial vehicle dynamics platform S/W. The simulation model is consist of in-wheel based powertrain model, full vehicle model and controller model. It is aimed at the validation of control algorithm for the in-wheel vehicle and hardware specific system specifications at the early stage of development. This paper also represents some simulation result for the verification of developed simulation model.
FPGA Board를 적용한 ZVS DC-DC Converter의 HIL Simulation 구현
강래청(Raecheong Kang),정기윤(Kiyun Jeong),김세현(Sehyun Kim),양인범(Inbeom Yang) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
The components of green-car are changed enormously by various power systems consisted of an engine and electric motors. Therefore, virtual integrated development environment is needed for modeling, performance evaluation and fault insertion test in a green car platform. Real-time simulation, hardware-in-the-loop, can be available to compose test environment for development and evaluation of electric components. The signal interface between the HIL simulator and a DC-DC converter is developed by designing appropriate wire harness and signal matching. Performance evaluation of the converter is conducted to show the feasibility of the HIL simulator at the virtual test environment. Several different scenarios are implemented and tested by the HIL simulator in real-time. The HIL simulator is also applied to the reliability and fault insertion tests such as extreme temperature test and over current test. HIL simulator generates fault signals on purpose in order to evaluate controller output signals at an abnormal mode. In this paper, the simulation environment is presented by developing Simulink models and compiling in the FPGAs board. The control board of the DC-DC converter is made and tested by the HIL simulation. The connection parts of the control board of the DC-DC converter are modified to communicate to the HIL simulator. To validate the safety at the abnormal situation, a variety of test scenarios can be simulated.