• Title/Summary/Keyword: 감속제어기

Search Result 55, Processing Time 0.021 seconds

CANDU의 감속재온도제어기 분석

  • 이윤희;하재홍;신해곤;김동완;남상구
    • Proceedings of the Korean Nuclear Society Conference
    • /
    • 1996.05a
    • /
    • pp.505-512
    • /
    • 1996
  • CANDU에서 감속재온도제어기는 칼란드리아 출구에서의 감속재온도를 일정하게 유지하기 위한 제어 프로그램이다. 본 연구에서는 강속재온도제어 알고리즘의 성능을 분석하기 위하여 주감속재계통의 동특성모델식을 적용하여 모의실험을 수행하였다. Setback 모의실험에 대하여는 설정온도를 적절히 유지하였으나, Stepback 모의실험에 대하여는 설정온도를 크게 벗어나는 오버슈트를 나타내었다. 되먹임제어기의 PID 파라메타를 최적화하고, 정상상태모델에 근거하여 앞먹임제어기의 설계를 개선함으로써 Stepback 모의실험에서 나타난 오버슈트를 줄일 수 있었다.

  • PDF

Development and Design of Robot Speed Reducer(RSR) with Straight Line Teeth Profile for Human Robot (휴먼 로봇을 위한 직선 치형을 갖는 로봇 감속기(RSR)의 설계 및 개발)

  • Nam Won-Ki;Jang In-Hun;Oh Se-Hoon;Shin Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.16 no.3
    • /
    • pp.315-320
    • /
    • 2006
  • There are many types of reduction drives for industrial applications. In general, high precision speed reducer which has a cycloid or involute teeth profile, used to in robot. Because, it is essential to use precision reduction drives for accuracy of position control on robot system. In this paper, we propose a robot speed reducer(RSR) with straight line teeth profile, which has basically a triangle teeth profile. In new straight line teeth profile, we have a good result for strength, stress and stiffness by using finite element analysis and the results indicate that variation of eccentric coefficient affects the optimal tooth motion, and it can lower the stress and noise.

Stress Concentration FEM Simulation of Robot Speed Reducer(RSR) with Straight Line Teeth Profile (직선 치형을 가진 로봇 감속기(RSR)의 응력 집중 FEM 해석)

  • Nam, Won-Ki;Kook, Chang-Ho;Ham, Seong-Hun;Jang, In-Hun;Oh, Se-Hoon;Sim, Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.17 no.7
    • /
    • pp.952-956
    • /
    • 2007
  • In industrial site, as the technology of FA developes, many robots can take the place of human labor. Generally, robots require high precision reducers which have cycloid or involute tooth profile. These reducers provide high reduction ratios with low backlash and high accuracy but need a high stiffness of tooth. In this study, to improve the high precision, the cycloid reducers which have straight line teeth profile are used. Also the FEM analysis, which consist of straight line teeth profile, was performed to simulate the stress of teeth profile.

Development of the Mechanical Power Monitoring System for Planetary Reduction Motor using Hall Effect Sensor (홀 이펙트 센서를 이용한 유성기어 감속기모터의 동력 모니터링 시스템 개발)

  • 장인훈;오세훈;심귀보
    • Proceedings of the Korean Institute of Intelligent Systems Conference
    • /
    • 2004.10a
    • /
    • pp.201-204
    • /
    • 2004
  • 감속기가 사용되어지는 경우 부하의 변동이나 구동부의 상태변화에 따라 모터의 토크, 회전수 등이 변하는데 이러한 값들을 모니터링 하면 부하의 변동이나 구동부를 진단할 수 있다. 본 논문은 유성기어를 이용한 기어드 모터를 제작하고, LCD를 포함하는 간단한 사용자 인터페이스를 통해 전달 Torque, 전달회전수(rpm), 전달동력을 확인할 수 있는 소형의 표시기가 있는 감속기에 관한 것이다. 일반적으로 전달 토크를 측정하는 장비는 크기가 크고 고가이며 계측기를 연결하고 측정하는 과정이 매우 번거로울 뿐만 아니라 지속적인 유지보수가 필요한 단점이 있다. 본 논문에서 제안하는 유성기어를 사용하면 간단히 모터의 토크 및 회전수를 측정할 수 있고 측정값을 표시하는 표시기를 모터에 부착할 수 있다. 측정 및 표시기는 기존 가격에 비해 매우 값싸게 제작할 수 있고 유지보수가 필요 없으며 검출 값을 시스템 제어부에 피드백 시키면 자기진단이 가능해진다. 특히 블루투스를 이용한 무선 통신기능을 부과하면 원격 모니터링이 가능하고 복수 모터유닛의 네트워크 구성이 용이하며 인터넷을 통한 데이터 통신으로의 확장이 가능하다.

  • PDF

Study on Vehicle Deceleration Control in School Zones by Taking Driver's Comfort into Account (스쿨 존에서 운전자의 승차감을 수반한 차량 감속 제어에 관한 연구)

  • Cho, Hyo-Seung;Kim, Hyoung-Seok;Lee, Byung-Ryong
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.34 no.10
    • /
    • pp.1359-1366
    • /
    • 2010
  • Recently, many electronic control techniques for vehicles have been developed and applied. One of the technologies can be X-by-wire such as throttle-by-wire, brake-by-wire, steer-by-wire, and etc, in which most of mechanical parts are replaced into electrical wire and actuators. In this study, the effect of throttle-by-wire and brake-by-wire control systems on vehicle velocity control, especially in a school zone, are taken into consideration. The number of accidents reported in school zones is higher than that in other places. The reason for this is that many vehicle drivers do not obey speed limit regulations. Moreover, some of the students are careless while crossing the streets. Therefore, in this study, we attempt to develop a method using throttle-by-wire and brake-by-wire control systems for automatically reducing the vehicle speed such that it will be within the speed limit. First, an engine model and a transmission system model are developed for a specific vehicle model. Second, speed reduction is carried out such that the reduction follows a pre-designed cubic spline trajectory; the trajectory is determined such that rapid deceleration, which causes discomfort to the driver and passengers, can be prevented, for which a fuzzy-PID control algorithm is applied for the trajectory following control. Finally, simulation results are presented to verify the performance of the proposed speed reduction control system.

Comparison and Analysis of Small Gas Turbine Performance Deck and Experimental Result (소형 가스터빈엔진의 천이상태 모사와 시험결과 비교분석)

  • 전용민;양인영;남삼식;김춘택;양수석;이대성
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2002.04a
    • /
    • pp.28-28
    • /
    • 2002
  • 가스터빈 엔진을 운용하는 데 있어서 가/감속율을 크게 하면 엔진성능 천이 시간은 짧으나 압축기에서의 서지나 터빈 입구온도의 급격한 상승이 발생할 수 있으며 가/감속율을 작게 하면 엔진은 안정적이나 천이시간이 길어지게 되어 결과적으로 엔진의 동적 응답성이 나빠지게 된다. 또한 압축기에서 발생할 수 있는 서지를 방지하기 위하여 압축기 서지 마진이 l0%∼20%인 서지 한계선(조정선)을 설정하여 엔진이 서지 한계선을 넘지 않도록 제어한다.

  • PDF

Speed Control Of The Magnet Gear-Based Speed Reducer For Non-contact Power Transmission (비접촉 동력 전달을 위한 마그네트 기어 기반 감속기의 속도 제어에 관한 연구)

  • Jung, Kwang Suk
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.17 no.7
    • /
    • pp.380-388
    • /
    • 2016
  • Using the magnet gear, it is possible to transmit power without mechanical contact. As the drive shaft in a magnet gear-based speed reducer system is isolated from the drive shaft, the system is a two-inertia resonance system that should cope with an external load with the limited air-gap stiffness. On the other hand, the drive shaft or low-speed side is controlled only by the torque of the drive shaft through an air-gap, and the excessive oscillation or the slip can then be generated because of an abrupt disturbance that is different from the general mechanical gear system. Therefore, the disturbance loaded at the low speed side should be measured or estimated, and considered in the control of the driving shaft. This paper proposes a novel full-state feedback controller with a reduced-order observer for the speed reducer system using a magnet gear with a unified harmonic modulator. The control method was verified by simulation and experiment. To estimate the load at the low speed side, a novel observer was designed, in which the new state variable is introduced and the new state equation is formulated. Using a full-state feedback controller including the observer, the test result against disturbance was compared with two D.O.F PI speed controllers. The pole slip was compensated within relatively a short time, and the simulation result about the estimated variable shows a similar tendency to the test result. The test results showed that the magnet gear-based reducer can be applied to an accurate servo system.

Operating Number Control of Compressors Based on Cooperative Logic for a High Efficiency Centrifugal Water Chiller (터보냉동기의 고효율 운전을 위한 협조 방식 기반의 압축기 대수제어)

  • Jeong, Seok-Kwon;Lim, Seung-Kwan;Ryu, Keon-Su
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.27 no.5
    • /
    • pp.233-240
    • /
    • 2015
  • This paper discusses compressors operating number control strategy using cooperative logic to cope with variable partial load for high efficiency of a centrifugal water chiller. The cooperative logic is composed of a speed-up and speed-down controller, enabling smooth operation of compressors and equivalent distribution of thermal load in each compressor. This centrifugal water chiller design can be operated with high efficiency without incurring excessive energy waste and large transient phenomena at partial load states. Simulations in MATLAB and experiments in a real chiller system were conducted and verified the high efficiency control of a centrifugal water chiller achieved by the suggested strategy.

Study on the Shift Characteristics of a 2speed Manual Transmission apply to V-Blet (V-blet를 적용한 2단 수동변속기의 변속특성에 관한 연구)

  • Youm, Kwang-wook
    • Journal of the Korean Institute of Gas
    • /
    • v.24 no.6
    • /
    • pp.55-60
    • /
    • 2020
  • As research and development of eco-friendly vehicles are expanding worldwide, additional devices of vehicles are reduced or deleted to increase the mileage, or research is being conducted to reduce weight. Among them, the multi-stage transmission that was applied to the internal combustion engine vehicle was deleted and replaced with a reducer, and the initial driving power is secured by increasing the torque through the control of the motor output value. However, since frequent motor speed change can result in a load increase, this study attempts to develop a compact and lightweight manual two-stage reducer with a general reducer structure. Therefore, a two-speed transmission with two gear ratio was designed by inserting a large gear and a small gear in a structure with a parallel shaft to connect the gears with a V-belt in the form of a parallel shaft reducer, and setting the gear ratio of the low and high gears respectively. In addition, power performance according to the rotational speed and load of the transmission was checked through a test, and the heat generation characteristics generated during driving were checked to verify the validity of the transmission.