• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.2762-2764
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• 2005

In this paper, we study the robot controller design using the voice and data communication via CDMA(Code Division Multiple Access) mobile communication network. We design the robot remote controller using the three methods, telephone call speech recognition, DTMF (Dual Tone Multiple Frequency) realization, SMS(Short Message Service) transmission/reception way via CDMA mobile communication network. We investigate the validity and effectiveness of the proposed remote controller which applied to the mobile robot.

• Journal of information and communication convergence engineering
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• 제21권1호
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• pp.45-53
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• 2023

This study constructs various scenarios required for landscape lighting; furthermore, a large-capacity general-purpose multifunctional controller is designed and implemented to validate the operation of the various scenarios. The multi-functional controller is a large-capacity general-purpose controller composed of a drive and control unit that controls the scenarios and colors of LED modules and an LED display unit. In addition, we conduct a computer simulation by designing a control system to represent the most appropriate color according to the input values of the temperature, illuminance, and humidity, using the neuro-control system. Consequently, when examining the result and output color according to neuro-control, unlike existing crisp logic, neuro-control does not require the storage of many data inputs because of the characteristics of artificial intelligence; the desired value can be controlled by learning with learning data.

• 한국ITS학회 논문지
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• 제12권3호
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• pp.1-10
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• 2013

지금 사용되는 제어기의 제어방식은 220V 고전압을 일대 일로 직접 신호등에 전달하는 스위치방식이다. 이 방식은 감전위험, 누설전류, 보행공간 침해, 미관 저하 등 많은 단점이 있다. 이에 따라 교통신호기의 제어방식이 디지털로 전환되는 노력이 이루어지고 있으며, 신호등과 신호기와의 디지털 통신 체계가 그 핵심으로 부상하고 있다. 본 논문은 이러한 디지털방식의 신호제어를 위해 필요한 통신체계를 개발하고자 하였다. 이를 위해 먼저 신호등을 포함한 다양한 신호기 주변장치와 특별한 메시지에 대하여 CAN 식별자(ID)를 할당하였다. 또한 이 할당된 식별자(ID)기반으로 신호등에 대한 제어정보를 전달하고 제어상태 피드백을 수집하는 CAN 기반 신호제어 프로토콜을 구성하였다. 이 통신체계의 검증을 위해 소프트웨어 모의실험시스템을 제작하여 신호제어에 활용 가능함을 검증하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.674-676
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• 2008

An electrostatic discharge (ESD) or a noise supplied from the outside has an effect on communication between the timing controller (TCON) and the memory element (EEPROM) through the interface between the timing controller and the memory element in liquid crystal displays (LCD). Therefore, we must apply ESD protection methods to LCD operating circuits for a normal operation. Our ESD protection circuit is to prevent from bi-directional communication errors between TCON and EEPROM due to an electrostatic discharge (ESD).

• 한국컴퓨터정보학회논문지
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• 제28권12호
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• pp.105-114
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• 2023

본 논문은 모바일 IAB를 향한 UxNB 네트워크 배포 및 운영 방안을 제안한다. SDN(Software Defined Network) 기반으로 UxNB 네트워크를 운영하여, 이동 통신 서비스를 원하는 지역에 UxNB를 배포한다. 서비스 지역에 UxNB를 배포한 후, IAB를 설정하여 이동 통신 서비스를 수행할 수 있다. 이를 위해 본 논문에서는 먼저 UAV 컨트롤러(UAV controller)와 SDN 컨트롤러(SDN controller)로 구성되는 UxNB 네트워크 컨트롤러(UxNB NC; UxNB network controller)를 제안하고 필요한 기능들을 기술한다. 다음으로 UxNB 네트워크를 배포하고 운영할 수 있는 시나리오를 단계별로 상세하게 제시한다. 또한 UxNB 네트워크 컨트롤러의 위치, UxNB에 대한 UAV 컨트롤러 제어 명령 전달 방법, UxNB 네트워크를 위한 IAB 적용 방법, UxNB 네트워크의 최적화, UxNB 네트워크의 RLF(radio link failure) 복구 및 UxNB 네트워크의 보안(security)에 대한 향후 연구를 논한다. 제안한 UxNB NC 아키텍처와 UxNB 네트워크 배포 및 운영 방안을 이용하여 모바일 IAB에 UxNB 네트워크를 원활하게 통합할 수 있을 것으로 기대한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.195-197
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• 2006

In this paper, an interface unit is designed to efficiently monitor transmission data in Controller Area Network(CAN)-based control systems. The CAN uses a serial multi master communication protocol that efficiently supports distributed real-time control with a very high level of data integrity, and communication speeds of up to 1Mbps. The interface unit is composed of a DSP controller which collects data on the CAN bus and transfers data to a personal computer via serial communication to save and display of interesting signals. The experimental system consists of three DSP controllers which represent electronic control units of a vehicle, an interface unit for analysing the data on the bus, and a graphic monitoring program coded on the Windows platform. The validity and the effectiveness of the proposed simple type of CAN interface unit are shown through the experimental results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.222-224
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• 2002

This paper investigates the adaptive control of a fuzzy logic based speed and flux controller for a vector controlled induction motor drive. A model reference adaptive scheme is proposed in which the adaptation mechanism is executed by fuzzy logic based on the error and change of error measured between the motor speed and output of a reference model. The control performance of the model reference adaptive control(mAC) fuzzy controller is evaluated by simulation for various operating conditions. The validity of the proposed MRAC fuzzy controller is confirmed by performance results for induction motor drive system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 G
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• pp.2473-2475
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• 1998

In this paper, we implemented RS232C serial communication by the 2 wires(Data,GND), and multiple access, by the applying Collision Sensing Multiple Access(CSMA) Protocol. Multiple access is implemented by assigning a unique ID to each controller. The multiple access control operation starts by sending a command packet from a host to another host and the command packet is composed of ID bytes of source and target host computer, data bytes and the check sum, byte. In host computer, after sending command packet, the collision from loop back data. If collision is detected, it means a command packet was collided with another command packet for another host. The packet communication of the controller enables the multiple acces of the controller through the common serial data link. The application of this serial communication through CSMA protocol and the usage of two wires, have an effect on saving the wires and convenient of layout work.

• The Journal of the Acoustical Society of Korea
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• 제28권1E호
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• pp.16-22
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• 2009

In this paper, the new robust active noise controller was proposed to be applied for attenuating the noises when the nonlinear distortion in the secondary path exists. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional LMS controller and proposed controller, to be applied for actively controlling the noises and linearizing the nonlinear distortion in the secondary path. Also, the simulations results demonstrated that the proposed controller may have faster convergence speed and better capability of controlling the noises and compensating the nonlinear distortion than the conventional LMS controller.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.123-125
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• 2007

The paper is proposed artificial neural network(ANN) sensorless control of induction motor drive with fuzzy learning control-fuzzy neural network(FLC-FNN)controller. The hybrid combination of neural network and fuzzy control will produce a powerful representation flexibility and numerical processing capability. Also, this paper is proposed speed control of induction motor using FLC-FNN and estimation of speed using ANN controller. This paper is proposed the analysis results to verify the effectiveness of the FLC-FNN and ANN controller.