• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.77.1-77
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• 2002

Platelets arrest bleeding and repair damaged blood vessels. The purpose of this paper is to formulate a mathematical model for the control of platelet adhesion within the vasculature consistent with experimental findings, particularly those of Frenette, Ruggeri , Savage, Yuan, Lawrence and Springer. In addition to providing some, albeit rudimentary, insight into the behavior of platelets, a numerical simulation of this theoretical model may be useful in a systematic study of pathological cases. Glycoprotein receptor complex (GPIb/V/IX), found on the platelet surface membrane, binds to the adhesive protein and ligand von Willebrand factor (vWf), located within the sub-endothelium. The binding...

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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• pp.2279-2282
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• 2003

This paper is research to control method between wireless LCD TV and Set-Top-Box. Audio and Video signal control of wireless LCD TV through Set-Top-Box, usually two systems fairly be away, there is weakness that must go to set-top-box for operation. In this paper design and manufacture to solve this weakness.

• 제어로봇시스템학회논문지
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• 제21권12호
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• pp.1142-1151
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• 2015

In this paper, High performance torque control based on the flux mapping of 48V Wound Rotor Synchronous Motor has been studied to improve torque control. Flux map considering MTPA (Maximum Torque Per Ampere), MFPT (Minimum Flux Per Torque), Maximum efficiency point at the same torque command and flux command for each field current was produced. Current map using flux mapping of Each field current was applied to the MTPA, MFPT. Generating a current vector locus was to determine the characteristics of the operation region. Through the Matlab/Simulink simulation, difference between speed-torque map and flux map was represented. The suggested flux map was tested actual experiments on a dynamometer.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1292-1294
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• 2007

In this report, the effects of chemical surface treatments of ITO gate electrodes of OTFTs have been studied by using acid and base solutions. As a result, it is observed that the threshold voltage of OTFTs could be influenced and modified by the surface treatments. The device with an ITO gate electrode surface-treated by a base solution shows the lowest threshold voltage of -7.66 V, while the threshold voltages are about -13.51 V and -15.3 V for the devices without a surface treatment and with the acid solution treatment, respectively. It is thought that the work function of ITO electrode surface might be affected by the surface treatments, thereby influencing the threshold voltage.

• 전기학회논문지
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• 제59권11호
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• pp.1996-2005
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• 2010

This paper proposes a new method for constant control of the output AC voltage of a voltage-fed three phase Z-source inverter (ZSI), in case of Z-network DC voltage variation or heavy change of load. The modulation index for the reference output AC voltage of ZSI can be calculated by the basic definition of ZSI, the input DC voltage and capacitor voltage of Z-network. And, the output AC voltage of ZSI is controlled by the modified space vector modulation (SVM) with the calculated modulation index. By the proposed method, the modulation index of output AC voltage is closely following in the reference modulation index. The validity of the proposed method is verified using PSIM simulation. In case which the input DC voltage of ZSI is heavily changed from 100[V] to 70[V] (or to 150[V]) and in case which load is changed from $30[\Omega]$ to $10[\Omega]$, we confirmed that the output AC voltage of ZSI is constantly controlled by the proposed method because the modulation index of ZSI is also simultaneously changed. Finally, FFT and %THD of the output voltage and current of ZSI by the proposed method are analyzed.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제49권3호
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• pp.165-168
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• 2000

Improvement on the switching characteristic of IGBT by means of the uniform and local lifetime control is studied numerically using two-dimensional simulator, MEDICI. In the case of uniform lifetime control, the on-state and switching characteristics are simulated as a function of lifetime, and compared with the experimental results reported, which allows a relationship between dose of electron irradiation and controlled lifetime. In the case of local lifetime control, simulations are carried out by varying the position, width, and lifetime of the locally controlled region, and the results are compared with the characteristics for the case of the uniform lifetime control. The turn-off time of the device with an optimized locally controlled region is found to decrease from about $4.5\mus$ to 0.11$mutextrm{s}$ while the forward voltage drop increases from 1.37V to 2.61V in comparison with that for the uniform lifetime control.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2009년도 추계학술발표대회
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• pp.141-142
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• 2009

The PEFP (Proton Engineering Frontier Project) is constructing a 100MeV proton Linac (Linear Accelerator). The 20 MeV 20 mA proton beam has been serviced for an application in the fields of material, biological, information technology and medical sciences. For a stable and efficient acceleration of a proton beam, the control requirements must be optimized by studying various control methods. We propose that the integrated control system for the Linac machine components must be based on a distribution control method to improve a centralized control system. Based on EPICS (Experimental Physics and Industrial Control System) real-time software, the VME (Versa Module European package format) IOC (Input Output Controller) was developed under cross development environment with a RISC (Reduced Instruction Set Computer) PowerPC system. In this paper, we describe the design and implementation of distributed control system using the VME-based EPICS middleware for various components of the large proton accelerator.

• 전기전자학회논문지
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• 제14권3호
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• pp.190-198
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• 2010

피에조소자를 구동하여 자동카메라의 초점을 자동으로 제어하는 시스템에서 피에조를 구동하는 집적회로를 설계하였다. 가공된 피에조에 변위를 만들기 위해서는 고전압 DC가 필요하다. 휴대형기기에서 사용하는 3[V]~4.2[V]정도의 낮은 전원전압을 약 80[V]로 승압하여 피에조 구동전압으로 제공하는 한편 입력되는 1[Vp-p]의 제어신호를 -20[V]에서 +80[V]까지 조절되도록 설계하였다. 또한 IC 외부에 적용되는 소자가 최소가 되도록 하여 시스템의 전체 크기를 줄일 수 있도록 하였다. 제어용 프로세서로 IIC(Inter-IC) 인터페이스를 적용하기 위하여 구동회로 내부에 IIC 인터페이스 디지털 로직을 내장하였는데, 이는 제품의 검증, 양산시 양품판정을 쉽게 해주는 장점이 있다. 제작공정은 AMIS 사의 I2T100 2P_3M 공정을 사용하였는데 0.6[um], 100[V]급 BCD공정이며, 6INCH 웨이퍼를 사용하였다. 전원전압 3.6[V], 소비전력은 약 40[mW]정도이다. 칩 사이즈는 1600*1500 [$um^2$]이며, 칩을 소형패키지에 내장하여 조립하였기 때문에 휴대형기기에 적용이 편리하게 되어있다.

• 제어로봇시스템학회지
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• 제18권2호
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• pp.21-29
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• 2012

최근 자동차 연구개발에 있어 내연기관을 대체하는 친환경 자동차기술과 더불어 무인자동차, 자율주행기술이 많은 부분에서 시도되고 실현되어가고 있다. 지능형 자동차라는 개념에서 적용되었던 운전자안전보조시스템, 편의지원과 사고경감 시스템 등이 하나로 통합되어 무인자동차 기술로 발전하고 있다. 또 차량에 고가의 센서를 장착하여 주변환경이나 운전자를 모니터링하는 방식에서 IT 융합기술을 이용한 네트워크기술 (V2I, V2V, V2N & V2X)을 접목시키는 방안을 통하여 개개의 차량은 물론 교통체계의 전체적인 변화를 추구하고 있다. 이러한 첨단차량기술은 새로운 교통문화(차량공유시스템, 군집주행)의 개발과 또다른 교통체계의 연구로 확장되어가고 있다.

• 전기전자학회논문지
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• 제24권1호
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• pp.364-367
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• 2020

본 논문에서는 OR논리게이트를 적용한 순차전압제어방식의 독립형 PV-ESS 시스템을 나타내고 있다. 저압연계방식으로 용량확대에 따른 문제점들을 가지고 있었던 기존 독립형 PV-ESS 시스템에 고압의 아날로그 방식의 순차전압제어 방식을 적용함으로써 고효율, 저가격이 가능한 독립형 PV-ESS 시스템을 제안한다. 본 논문은 기존 24V 태양광 단위 모듈의 직렬연결 확장형 고압 배터리의 출력전압 384V을 3상 DC to AC 인버터의 입력 전압으로 하여 인버터의 출력 전압과 출력 전력을 AC380V@60Hz와 10kW로 구성하였다. PSIM 시뮬레이션에 의한 이론 해석의 타당성을 입증하기 위해 실험을 통해 OR 논리 게이트를 적용한 순차전압제어시스템의 동작 특성을 확인하였다.