• 한국자동차공학회논문집
• /
• 제7권6호
• /
• pp.72-81
• /
• 1999

A nonlinear engine torque and speed control algorithm using throttle angle control is developed with an engine load torque estimation algorithm. Three 3-dimensional nonlinear engine maps as a part of the nonlinear control algorithm are obtained from steady state engine dynamometer tests. An electric throttle actuator is developed using a stepper motor and a 8 bit micro-processor. The speed control and external load estimation algorithm are tested via engine speed control experiments, and show performance good enough for using various engine torque and speed control applications.

• 대한의용생체공학회:의공학회지
• /
• 제12권1호
• /
• pp.1-7
• /
• 1991

This paper describes and discusses the employment of HMG pattern analysis to provide upper-motor-neuron paraplegics with patient-responsive control of FES ( functional electrical stimulation) for the purpose of walker-supported walking. The use of above-lesion EMG signals as a solution to the control problem is considered. The AR(autoregressive)parameters are identified by time-varying nonstationary Kalman filler algorithm using DSP chip and classified by fuzzy theory. The control and stimuli part of the below-lesion are based on micro-processor(8031). The designed stimulator is a 4-channel version. The experiments described above have only attempted to discriminate between standing function and sit-down function A further advantge of the this system Is applied for motor rehabilitation of social readaption of paralyzed humans.

• 전기학회논문지
• /
• 제61권4호
• /
• pp.574-579
• /
• 2012

In this paper, the battery charger developed which is satisfy by the characteristics of the rapid control and reduce the cost of the charger. analog-digital mixed mode controller developed with dedicated IC for PWM control and low-performance micro-processor is using for the operation control of charger. The low-cost NEV charger developed to verify the performance and usability is verified with charging battery experiment by of using developed charger.

• 한국산학기술학회:학술대회논문집
• /
• 한국산학기술학회 2010년도 추계학술발표논문집 2부
• /
• pp.634-637
• /
• 2010

본 논문은 미세구조의 마이크로 액추에이터의 구동해석을 위한 결과로써 3차원 유한요소해석(Finite Element Analysis, FEA)을 이용하여 수행하였다. 마이크로머신과 같은 미소구조물을 해석하는 경우, 컴퓨터의 메인 프로세스에 비해 프리프로세서(pre-processor)의 비중이 높아지고 있어 그 효율화가 가장 중요하다. 수작업에 의존해야 했던 지난날의 요소분할법 기술은 최근에 들어 여러 연구자들에 의해 개발되고 있다. 특히, 복합현상을 다루는 정전 액추에이터에 직접적인 적용에 다소 어려움이 있는데 3차원적인 수치 및 실험평가는 실용적인 문제에서 비추어 볼 때 매우 중요하다. 따라서 본 논문에서는 센서로서의 역할을 하는 마이크로 정전 액추에이터의 기본설계를 위한 토대를 구축하고자 3차원적인 FEA 시뮬레이션을 수행하여 미세 회전운동을 분석하였다. 그 결과 설계된 모델에서 먼저 자중해석과 Mode 해석에서 기준치를 모두 만족하였다. 또한 설계된 액추에이터의 형상에 따른 회전자의 변형해석을 수행하여 시작토오크와 탄성한계까지의 위치제어에 필요한 회전각을 구하였으며, 정전장 해석을 통하여 시작토오크는 전압 $V^2$에 비례함을 알 수 있었다.

• 한국정보통신학회논문지
• /
• 제5권3호
• /
• pp.581-590
• /
• 2001

본 연구는 광 전송 시스템에 레이저 다이오드의 안정되고 고정된 출력 파장의 광원을 제공하기 위한 것이다. 레이저 다이오드를 구동하기 위하여 안정된 정전류 회로를 설계하려 했으며, 레이저 다이오드 자체의 온도센서와 TEC(Thermo Electric Cooler)를 이용하여 레이저 다이오드 내부의 온도를 제어하는 온도 제어 회로를 구성하였다. 또한 광 출력에 Wavelength Locker글 이용하였다. 최종적으로 이들을 제어하기 위하여 A/D, D/A 컨버터와 마이크로 프로세서를 사용하였다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
• /
• pp.321-324
• /
• 1988

This paper presents the result of driving performance analysis of PMSM type AC servo motor based on control system using a microprocessor. The experiment using the microprocessor is tested with a 120[v], 200[w] PMSM type AC servo motor. The PWM signal generated in the microprocessor for the servo motor voltage is chapped by power transistor modules to change the AC servo motor speed. The torque of the AC servo motor with a permanent magnet can be easily controlled over a wide range by changing the AC servo motor current.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
• /
• pp.288-290
• /
• 2006

This paper presents the real-time water tank wireless control in a ship using duplex RF modules and PLC(Programmable logic Controller). The purpose of this paper is developing HMI(Human Machine Interface) for automation equipments. The system can low a cost because long wires are no more used. Analog signals of the water gauge and flow meter are changed to discrete signals by the micro-processor. The PLC checks the volume of water and runs On or Off of the valve and pump. Duplex RF modules send and receive data between the water tank and control room. Everywhere the Internet is used, operators are able to check the status of the system by the web-server.

• 한국세라믹학회지
• /
• 제23권2호
• /
• pp.64-70
• /
• 1986

In this investigation x-ray diffraction method was mainly studied for quantitative analysis of clinker mineral composition. And also optical microscopic observation and Bogue calculation method were applied to compare with the x-ray diffraction method. In the procedure of x-ray diffraction analysis graphite monochromator automatic divergence slit and spinner for sample holder were used for minimizing the error due to the operation of the equipment. Especially the separation of overlapped peaks were proceeded by micro-processor automatically. The results of x-ray diffraction method for synthesized clinker were consistent with the Bogue value and the results of optical microscopic observation. However the results of quantitative analysis of mineral composition or commercial clinker containing solid solution of minor component were different from the Bogue value. On the other hand they agreed reasonably well with results of the optical mic-roscopic observation.

• 대한전기학회논문지
• /
• 제36권10호
• /
• pp.703-712
• /
• 1987

A position detection method for 2 phase bifilar permanent magnet step motors is proposed. The back emfgenerated on 2 phase windings by rotor permanent magnet is calculated using motor terminal voltage and current by analog circuit, and the rotor position output is obtained from tese back emf signals through some logical manipulation circuit. This position detector functionally acts like a 2 channel optical incremental encoder, and it is also shown by experimental results that it works well over wide range of speed or under resonant condition where the rotor rings around the detent position. Its resolution is twice of the number of steps per revolution. Bu software implemented on micro-processor, the reliability of position output is enhanced, detecting and correcting error dut to external and/ or internal noise.

• 대한전기학회논문지
• /
• 제37권11호
• /
• pp.786-795
• /
• 1988

In this paper a boiler control system simulator is designed and inplemeted in order to evaluate performance of the Fault Tolerant Control System. It simulates a boiler control system of a thermal power plant containtng boiler process, peripheral units and analog controller. The simulator uses a low order linear model for boiler first order models for the peripheral unit. Specifically the model of the analog controller is modularized and transformed to digital form if order to be implemented using a micro-processor board. The experimental results show the usability of the developed simulator for the performance test of the FTCS.