• Title, Summary, Keyword: instrumentation

Search Result 3,295, Processing Time 0.036 seconds

Distributed control of Network devices through Remote Terminal

  • Gulpanich, Suphan;Ploysuk, Banharn;Kongratana, Kongratana;Suesut, Taweepol;Tirasesth, Kitti
    • 제어로봇시스템학회:학술대회논문집
    • /
    • /
    • pp.1127-1131
    • /
    • 2005
  • One of problems in industries is an installation for an automation system device such sensor, transducer, controller, and so on those are located in different areas. Such problem makes a difficulty for maintenance and installation. The aim of this research attempts to design a high performance controller with remote devices. One attractive is to group near devices in near place together to centralizes control. This paper presents network device groups distributed through digital and analog Remote Terminal Unit (RTUs). Such devices are centralized by computer or PLC control and communicated with similar protocol through serial bus. Our scheme, there are many advantages such as, saving both time and cost,convenience compared to other ways.

  • PDF

Case Study of Shape Design of Load Cell Using Finite Element Method

  • Reaugkittakarn, Saravut;Sripituk, Jettiya;Pongswatd, Sawai;Pannil, Pittaya;Ukakimapurn, Prapart
    • 제어로봇시스템학회:학술대회논문집
    • /
    • /
    • pp.2054-2057
    • /
    • 2005
  • In this paper, the application of finite element method to design the shape of load cell as an illustrative case study is described. The relationship between the various shapes of load cell and their stress characteristic were analyzed by COSMOS simulation program. The results obtained from the proposed analysis can be applied to determine the appropriate position of strain gauges for good quality load cell. The experimental results show the good efficiency of the proposed technique.

  • PDF

Color volumetric 3D display system based on a rotating LED Screen

  • Haifeng, Li;Jiang, Wu;Xu, Liu;Caijie, Yan;Zhenrong, Zheng
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • /
    • pp.510-512
    • /
    • 2009
  • A volumetric 3D display system based on a rotating two dimensional color LED array is set up. It has a cylinder display space ${\Phi}800{\times}640mm3$ which is composed of 256 slices of pictures in one 3D image with each slice $320{\times}256$ LED pixels. The volumetric image has 4 gray scales and 64 colors. The main structure and working principle of the system is described in detail.

  • PDF

CURRENT STATUS OF THE INSTRUMENTS, INSTRUMENTATION AND OPEN USE OF OKAYAMA ASTROPHYSICAL OBSERVATORY

  • YOSHIDA MICHITOSHI
    • Journal of The Korean Astronomical Society
    • /
    • v.38 no.2
    • /
    • pp.117-120
    • /
    • 2005
  • Current instrumentation activities and the open user status of Okayama Astrophysical Observatory (OAO) are reviewed. There are two telescopes in operation and one telescope under reforming at OAO. The 188cm telescope is provided for open use for more than 200 nights in a year. The typical over-subscription rate of observation proposals for the 188cm telescope is ${\~}$ 1.5 - 2. The 50cm telescope is dedicated to $\gamma$-ray burst optical follow-up observation and is operated in collaboration with Tokyo Institute of Technology. The 91cm telescope will become a new very wide field near-infrared camera in two years. The high-dispersion echelle spectrograph (HIDES) is the current primary instrument for the open use of the 188cm telescope. Two new instruments, an infrared multi-purpose camera (ISLE) and an optical low-dispersion spectrograph (KOOLS), are now under development. They will be open as common use instruments in 2006.

An Analysis of Instrumentation Radar's Beacon Tracking Performance Considering a Target Attitude (표적의 자세 변화를 고려한 계측 레이더의 비콘 추적 성능 분석)

  • Ryu, Chung-Ho;Ye, Sung-Hyuck;Hwang, Gyu-Hwan;Seo, Il-Hwan
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.13 no.4
    • /
    • pp.561-568
    • /
    • 2010
  • Instrumentation radar in a test range has an important role to measure target's TSPI(time, space, position, information). It is well known that it tracks a target stably using a beacon mode. But it may fail to track a target in a certain region using a beacon mode. In this paper, we modeled a simple missile shape similar to ATCMS with two beacon antenna and analyzed an antenna radiation pattern using MLFMM(Multi Level Fast Multipole Method) method. Using the analyzed result of the radiation pattern of the antenna and the attitude data of target, we simulated beacon tracking performance of an instrumentation radar. As a result of simulation, we showed that an instrumentation radar may lose the target because it tracks a area of the beacon antenna pattern.

Modern Probabilistic Machine Learning and Control Methods for Portfolio Optimization

  • Park, Jooyoung;Lim, Jungdong;Lee, Wonbu;Ji, Seunghyun;Sung, Keehoon;Park, Kyungwook
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • v.14 no.2
    • /
    • pp.73-83
    • /
    • 2014
  • Many recent theoretical developments in the field of machine learning and control have rapidly expanded its relevance to a wide variety of applications. In particular, a variety of portfolio optimization problems have recently been considered as a promising application domain for machine learning and control methods. In highly uncertain and stochastic environments, portfolio optimization can be formulated as optimal decision-making problems, and for these types of problems, approaches based on probabilistic machine learning and control methods are particularly pertinent. In this paper, we consider probabilistic machine learning and control based solutions to a couple of portfolio optimization problems. Simulation results show that these solutions work well when applied to real financial market data.

Thermal Characterization of Individual Pixels in Microbolometer Image Sensors by Thermoreflectance Microscopy

  • Ryu, Seon Young;Choi, Hae Young;Kim, Dong Uk;Kim, Geon Hee;Kim, Taehyun;Kim, Hee Yeoun;Chang, Ki Soo
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.15 no.5
    • /
    • pp.533-538
    • /
    • 2015
  • Thermal characterization of individual pixels in microbolometer infrared image sensors is needed for optimal design and improved performance. In this work, we used thermoreflectance microscopy on uncooled microbolometer image sensors to investigate the thermal characteristics of individual pixels. Two types of microbolometer image sensors with a shared-anchor structure were fabricated and thermally characterized at various biases and vacuum levels by measuring the temperature distribution on the surface of the microbolometers. The results show that thermoreflectance microscopy can be a useful thermal characterization tool for microbolometer image sensors.

A Suspension Control of A PM-based Magnetic Suspension System (영구자석을 포함한 자기부상시스템의 부상제어)

  • Kim, Jong-Moon;Kim, Choon-Kyung;Park, Min-Kook;Chun, Jong-Min;Pyon, Han-Sub
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.2264-2266
    • /
    • 2001
  • In this paper, some suspension results for a magnetic suspension system with permanent magnet are presented. The electromagnetic model using the equivalent magnetic circuit is shown. And some control simulation results using Matlab/Simulink S/W are presented.

  • PDF

Development of Electromotion Auxiliary Bicycle (전동보조자전거의 개발)

  • Lee, Hyung-Ki;Choe, Yeon-Wook;Park, Han-Seok;An, Young-Joo;Shin, Bong-Chul
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.2033-2035
    • /
    • 2001
  • 본 연구는 기존의 자전거에 전기 구동장치를 장착시켜서 자전거의 페달링에 의하여 검출된 답력을 이용한 보조 동력 구동장치에 대한 개발이다. 답력의 검출은 불시의치차를 이용한 동력 전달장치를 이용하였다. 이 장치의 입력기어에서 출력기어로 동력을 전달하는 아이들 피니언 기어와 결합된 캐리어를 동력 전달시 발생하는 반력에 의한 각도를 이용하여 토크량을 측정하였다. 동력전달을 할 경우 발생하는 반력에 의한 회전각을 자기센서를 이용하여 답력을 측정하였다. 이 답력을 구동회로에 인가하여 보조동력을 자전거에 인가함에 따라 주행을 쾌적하게 하도록 개발하였으며 실험을 통하여 실용성을 고찰하였다.

  • PDF

Development of LVAD Control System using Micro Controller (마이크로 컨트롤러를 이용한 전기유압식 좌심실보조기 제어시스템의 개발)

  • Lee, S.W.;Chung, C.I.;Choi, J.W.;Kim, H.C.;Min, B.G.
    • Proceedings of the KOSOMBE Conference
    • /
    • v.1992 no.11
    • /
    • pp.127-129
    • /
    • 1992
  • In this paper, we describe about control system for eletro-hydraulic LVAD(Left Ventricular Assist Device) and control algorithm for two operation mode. One is asynchronous operation mode and the other is synchronous operation mode synchronized with natural heart's R pulse. We also present implementation method of software PI algorithm for velocity control of motor used in LVAD system and its response.

  • PDF