• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 B
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• pp.649-651
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• 1999

This paper presents SNMP remote management system for power plants using micro-controller. Control board supporting LAN-based remote monitor and control is produced and MMI program on PC is also constructed. To expand into Internet, SNMP(Simple Network Management Protocol), the standard network management protocol of TCP/IP protocol suite, is ported to this control board consisted of micro-controller, 80c196KC, and LAN controller, Am7990DC. To overcome the constraints of CPU performance and memory capacity, TCP/P protocol suite is simplified and informations needed to management were implemented in accordance with MIB(Management Information Base) specified in RFC. Also monitoring software is constructed by Visual Basic.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.148-152
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• 2003

This paper is concerned with the digital implementation of the active vibration suppression controller. The digital controllers are often implemented on the DSP board, which is very fast but expensive. There are many low-cost micro-controllers in the market but the feasibility of such micro-controllers for the active vibration suppression has never been conducted. In this study, we selected PIC 16F877 as a proper micro-controller for the digital implementation of the PPF controller. The circuit diagrams are explained in detail. Experimental results show that the low-cost micro-controller can be used as the active vibration controller.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.249-250
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• 2006

In this paper, hardware design and implementation of digital controller for the High Precision Digital Power Supply (HPDPS) based on Digital Signal Processor (DSP) and Field Programmable Gate Array (FPGA) is presented. Developed digital controller is composed of high resolution Digital Pulse Width Modulation (DPWM) and high resolution analog to digital converter circuit with anti-aliasing filter. And Digital Signal Processor (DSP) has the capability of a few micro-second calculation time for one feedback loop. 32-bit DSP and DPWM with 150[ps] step resolution is used to implement the HPDPS. Also 18-bit 2 mega sample per second ADC board is adopted for the developed digital controller. Also, hardware structure of the developed digital controller and experimental results of the first prototype board for HPDPS is described.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.834-837
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• 1993

This paper describes the implementation of an autonomous fuzzy logic controller. The controller is endowed with basic control principles and learning constructs which enable it to autonomously modify its control policy based on system performance. The controller lies dormant when system response is satisfactory but if rapidly initiates adaptation in real time when adverse performance is observed. The autonomous fuzzy controller is implemented on an Intel MCS-51 series micro-controller board using an inexpensive 8-bit Intel 8031 processor. The 11.06 MHz micro-controller operates at a rate exceeding 200 "global" look-up table reinforcements per second. This is important when developing practical on-line adaptive controllers for fast systems. It is also significant because an initial controller look-up table could be incorrect or non-existent. The relatively high learning rate enables the controller to learn to control a system even while it is controlling it.

• 한국위성정보통신학회논문지
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• 제7권2호
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• pp.54-58
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• 2012

본 논문에서는 사용자가 존재할 때만 LED 조명을 활성화해서 통신 기능을 수행하고 사용자가 없을 때에는 자동으로 LED 조명을 비활성화 할 수 있는 종합 제어 시스템 기반 기술을 디자인하고 구현하였다. 이 시스템은 마이크로 콘트롤러를 이용한 사용자 감지기능을 수행하는 HW 모듈과 웹을 통한 종합 제어 시스템 SW 모듈로 구성된다. 마이크로 콘트롤러 보드는 ATMega2560를 이용하여 설계하고, 적외선과 초음파 센서를 이용하여 사용자 유무를 판단하였으며, 웹 기반의 모니터링 시스템은 스마트 디바이스를 통해서 제어할 수 있도록 구성하였다. 두 모듈의 연동 테스트를 통해서 본 시스템의 유효성을 검증하였다.

• 디지털융복합연구
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• 제12권2호
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• pp.531-537
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• 2014

본 논문은 공주대학교 공과대학 학생들에게 다학제간 캡스톤 디자인을 운영하기 위한 모델을 제시한다. 여름방학 계절학기 기간 중에 공주대학교 공과대학에서 다학제간 캡스톤 디자인을 운영하였다. 다학제간 캡스톤 디자인에 참여한 학생들은 이전에 캡스톤 디자인 교과목을 수강하지 않은 서로 연관이 없는 5개 전공 학생들이다. 다양한 전공의 학생들에게 캡스톤 디자인작품을 완성하기 위해 센서 및 액츄에이터 등을 이용하는 아두이노 우노 마이크로 컨트롤러 제어보드를 사용하는 캡스톤 디자인 모델을 도입하였다. 만족도 평가를 통해 더 창의적이면서 현장감 있는 의미 있는 교육이 진행되었음을 알게 되었다. 이를 통해 다학제간 캡스톤 디자인 부분에서 앞으로의 가능성 있는 방향을 제시하였다.

• 한국위성정보통신학회논문지
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• 제7권2호
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• pp.25-29
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• 2012

본 논문에서는 스텝핑 모터와 연동하여 방향 제어되는 LED 빔 포밍 통신 시스템을 HW로 구현하였다. ATMega1284 MCU를 이용하여 제어 보드를 구성하였으며, PC와 연결되는 RS232 IO와 스텝핑 모터 구동 보드 제어용 포트(Port)를 이용하여 외부 인터페이스를 구성하였다. 스텝핑 모터는 200 PWM으로 360도 회전하고 동시에 반경이 커지는 아르키메디스의 소용돌이(Archimedian Spiral) 방식을 적용하여 목표하는 지점을 선택적으로 조명할 수 있도록 하였다. 이 빔 포밍은 RS232와 연결된 PC 툴(tool)에 의해서 제어되며, ATMega1284 MCU 보드가 호스트(host) 역할을 하였다. 빔 포밍의 동작은 실제 구현된 HW/SW 기반으로 그 유용성을 검증하였다.

• 대한임베디드공학회논문지
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• 제17권6호
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• pp.375-382
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• 2022

This paper proposes a multi-core cooperative computing structure considering the heterogeneous features of automotive embedded on-chip software. The automotive embedded software has the heterogeneous execution flow properties for various hardware drives. Software developed with a homogeneous execution flow without considering these properties will incur inefficient overhead due to core latency and load. The proposed method was evaluated on an target board on which a automotive MCU (micro-controller unit) with built-in multi-cores was mounted. We demonstrate an overhead reduction when software including common embedded system tasks, such as ADC sampling, DSP operations, and communication interfaces, are implemented in a heterogeneous execution flow. When we used the proposed method, embedded software was able to take advantage of idle states that occur between heterogeneous tasks to make efficient use of the resources on the board. As a result of the experiments, the power consumption of the board decreased by 42.11% compared to the baseline. Furthermore, the time required to process the same amount of sampling data was reduced by 27.09%. Experimental results validate the efficiency of the proposed multi-core cooperative heterogeneous embedded software execution technique.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1195-1201
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• 2011

Since the release of safety standard IEC 61508 which defines functional safety of electronic safety-related systems, SIL(Safety Integrity Level) certification for railway systems has gained lots of attention lately. In this paper, we propose a new design technique of the computer board for train control systems with high reliability and safety. The board is designed with TMR(Triple Modular Redundancy) using a certified SIL3 Texas Instrument(TI)'s TMS570 MCU(Micro-Controller Unit) to guarantee safety and reliability. TMR for the control device is implemented on FPGA(Field Programmable Gate Array) which integrates a comparator, a CAN(Controller Area Network) communication module, built-in self-error checking, error discriminant function to improve the reliability of the board. Even if a malfunction of a processing module occurs, the safety control function based on the proposed technique lets the system operate properly by detecting and masking the malfunction. An RTOS (Real Time Operation System) called FreeRTOS is ported on the board so that reliable and stable operation and convenient software development can be provided.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.24-29
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• 1991

RCCL(Robot Control C Library) is general purpose robot control language. It is programmed with C language and composed of C library. So it is well portable and supports sensor integration control and high level force control algorithms. We implemented RCCL on PUMA. We developed servo controller of DDC(Direct Digital Control). We used intel 8097BH one chip micro controller as CPU. One digital servo board controls three motors. Host computer is IBM PC 386DX-33 with RCCL.