• Title, Summary, Keyword: System Control

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Configuration of a Boiler Control System in Thermal Power Plant (화력 발전소 보일러 제어 시스템의 구성에 관한 연구)

  • 변승현;박두용;김병철;신만수
    • 제어로봇시스템학회:학술대회논문집
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    • pp.168-168
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    • 2000
  • In this paper, a boiler control system for thermal power plant is configured. The boiler control system for thermal power plant is largely composed of an ABC(Automatic Boiler Control) system and a MBC(Mill Burner Control) system. ABC system controls analog process values, so almost all analog control logic is dealt with in ABC system. On the other hand, MBC system relates to sequence control logic such as MFT logic, Furnace Purge, Safety related logic. Advanced control systems made from advanced countries deal with an ABC system and MBC system in a distributed control system. In this paper, we adopt a DCS as an ABC system and adopt a PLC system as a MBC system to configure a boiler control system for thermal power plant using domestic control system. Finally the validity of the configured boiler control system is shown via simulation using digital simulator for boiler system in thermal power plant.

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A Study on the Fisheries Control System of the Fisheries Act of Korea (수산관련법상(水產關聯法上) 어업관리제도(漁業管理制度)에 관한 연구(硏究))

  • Lee, Zong-Keun
    • Journal of Fisheries and Marine Sciences Education
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    • v.11 no.1
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    • pp.1-23
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    • 1999
  • The fisheries control system being now enforced in all countries may be generally classified as three types - the input control system, the output control system, and the technical control system. In Asian countries that have relatively small fishery scales, diverse object species and the fisheries resources has been regarded as "governmental possessions", fisheries have been controled subsidiarily using the technical control system based on the input control system traditionally. While in Europe and America that have relatively large fisheries scales, simple object species and the fisheries resources has been regarded as "common property", fisheries have been controled subsidiarily using the input control system and the technical control system based on the output control system. In Korea, fisheries have been controled subsidiarily using the technical control system based on the input control system traditionally, nevertheless overexplotation and overcapitalization have not been solved. Recently the EEZ was promulgated, the total allowable catch system was introduced to control the EEZ. But the output control system is totally different from the input control system of the Korea traditional fisheries system, simultaneous availableness of both system is considerably difficulty. Therefore a study on new systems to make both systems harmonized has to be performed. The thesis is aimed at presenting the general improvement direction of the Korea fisheries control system as the basis for establishment of the new fisheries control system.

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The implementation of Access Control System using Biometric System (Biometric System(fingerprint Reader)을 이용한 Access Control System 구현에 관한 연구)

  • 김광환;김영길
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.439-442
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    • 2003
  • In this paper, a system that implementation of Access Control System Using Biometric System. Biometrics is science which deals with verifying or recognizing using physiological or behavioral characteristic Access Control System uses Biometric system to make an access control system. Biometrics goes under the study of bio-recognition or bio-measurement. It is a technology or study that identifies individuals using one's Biometric character. Access control system is a system used to identify one's entrance and exit, personal management, and security. Access control system can be joined with Biometric system to produce easier use and more sufficient effects. Access control system using Wiegand (Data Format) signal output, can replace earlier RF Card systems and make an access control (security) system. It uses RS-232, Rs-422 or TCP/IP type communication with the computer so an embedded system can be controlled using the software.

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The implementation of Access Control System using Biometric System (생체인식 시스템을 이용한 Access Control System 구현에 관한 연구)

  • 김광환;김영길
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.2
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    • pp.494-498
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    • 2004
  • In this paper, a system that implementation of Access Control System Using Biometric System. Biometries is science which deals with verifying or recognizing using physiological or behavioral characteristic Access Control System uses Bionietric system to make an access control system. Biometrics goes under the study of bio-recognition or bio-measurement. It is a technology or study that identifies individuals using one's Biometric character. Access control system is a system used to identify one's entrance and exit, personal management, and security. Access control system can be joined with Biometric system to produce easier use and more sufficient effects. Access control system using Weigand (Data format) signal output, can replace earlier RF Card systems and make an access control (security) system. It uses RS-232, Rs-422 or TCP/IP type communication with the computer so an embedded system can be controlled using the software.

A Control System for Solar Thermal Power Plant (태양열발전 제어시스템)

  • Park, Young-Chil
    • 한국신재생에너지학회:학술대회논문집
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    • pp.693-697
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    • 2007
  • A control system for solar thermal power plant is the control system to coordinate the whole system's operation, including management of distributed control systems, process control for optimal operation of total system, monitoring system operating conditions and doing administrative functions. This work, as a progress report, presents the results obtained so far in building a control system for the 1MW solar thermal power plant. To make the control system, we first defined the control system's hierarchy and classified the role of each layer. Then, as the first stage of making control system, we designed and developed the sun tracking control system for heliostat.

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Robust Hybrid Control System (강인 복합제어 시스템)

  • 박규식;정형조;오주원;이인원
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.442-449
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    • 2003
  • This paper presents a robust hybrid control system for seismic response control of a cable-stayed bridge. Because multiple control devices are operating, a hybrid control system could alleviate some of restirctions and limitations that exist when each system is acting alone. A LQG algorithm with on-off control scheme, H$_2$ and H$_{\infty}$ control algorithms with various frequency weighting filters are used to improve the controller robustness of the active control part in the hybrid control system. The numerital simulation results show that control performances of robust hybrid control systems are similar to those of the hybrid control system with LQG algorithm. Furthermore, it is verified that robust hybrid control systems are more robust than the hybrid control system with LQG algorithm and there are no signs of instabilities in the $\pm$5% stiffness matrix perturbed system. Therefore, the proposed hybrid control system have a good robustness for stiffness matrix perturbation without loss of control effectiveness.

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A Design of Main Control Unit in CRCS/CEDMCS (원자로 제어봉구동장치제어시스템 주제어부 설계)

  • Cheon, Jong-Min;Lee, Jong-Moo;Kim, Choon-Kyoung;Kwon, Soon-Man;Shin, Jong-Ryeol
    • Proceedings of the KIEE Conference
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    • pp.559-561
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    • 2004
  • In this paper, we design two types of Main Control Unit for Control Rod Control System and Control Element Drive Mechanism Control System, respectively, using a domestic Distributed Control System(DCS) developed to localize the instrumentation and control(I&C) system for nuclear power plant(NPP). There are many parts developed by domestic skills and being operated successfully in NPP, but the development of I&C system as an essential part has been slow in progress. We will show the great possibility of developing peculiar Korean I&C system by applying this domestic DCS to nuclear I&C system and confirming its successful operation.

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AWS (WORKSTATION FOR AI - ADVANCED CONTROL)

  • Takano, Masamoto;Kurotani, Kenichi;Kanno, Tomoji;Takeda, Kenzo;Nakazato, Famiaki;Uwai, Hisayoshi
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1440-1445
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    • 1990
  • The system with softfware packages for control system design unifying and encompassing rule based control and conventional control based on numerical models were developed. Users who are not familiar with control theory, numerical computing, and artificial intelligence (AI) can perform system analysis, control design and development of AI control system without difficulty.

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Electronic-hydraulic Hitch Control System for Agricultural Tractor -Draft Control- (트랙터의 전자유압식(電子油壓式) 히치 제어(制御) 시스템에 관한 연구(硏究)(II) -견인력제어(牽引力制御)-)

  • Yoo, S.N.;Ryu, K.H.;Yun, Y.D.
    • Journal of Biosystems Engineering
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    • v.14 no.4
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    • pp.229-241
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    • 1989
  • The purposes of this study were to develop an electronic-hydraulic draft control system for tractor implements, to investigate the control performance of the system and the possibility of adaptation to the conventional tractor. Experiments were carried out to investigate the responses of the system to the step and sinusoidal inputs in draft control. The effects of control mode, hydraulic flow rate, reference deadband, and proportional constant on control performance of the system were investigated. Moreover, the effects of filtering signals from draft sensor were also investigated. The following conclusions were derived from the study; 1. In draft control, there were hunting problems in controlling the implement without filtering the draft signals. Filtering was performed by a control program of electronic controller and the control performance and stability of the system were improved significantly. 2. For the draft control system operated on on-off control mode, draft was controlled within ${\pm}27-{\pm}55kg_f$ to the reference draft when the hydraulic flow rates were 5-15 l/min. For the draft control system operated on PWM control, draft was controlled within ${\pm}27kg_f$ to the reference draft regardless of hydraulic flow rates. 3. In the frequency responses of the draft control system, control performance on PWM control mode was not better than on on-off control mode because of characteristics of hydraulic valve and drafe sensor. As the hydraulic flow rates increased for the system operated on on-off control mode, the corner frequency of amplitude attenuation increased, but the corner frequency of phase-angle change remained nearly the same. But, the system was unstable beyond the frequency of 3.1 rad/s. 4. The electronic-hydraulic hitch control system developed in this study showed superior control performance, stability and convenience compared to conventional mechanical-hydraulic hitch control system. It is considered to be a superior replacement for the conventional mechanical-hydraulic hitch control system.

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A design on optimal PD control system that has the robust performance (강인한 성능을 가지는 최적 PD 제어 시스템 설계)

  • Kim, Dong-Wan;Hwang, Hyeon-Jun
    • Journal of Institute of Control, Robotics and Systems
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    • v.5 no.6
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    • pp.656-666
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    • 1999
  • In this paper, we design the optimal PD control system which has the robust performance. This PD control system is designed by applying genetic algorithm (GA) to the determination of proportional gain KP and derivative gain KD that are given by PD servo controller, to make the output of plant follow the output of reference model optimally. These proportional and derivatibe gains are simultaneously optimized in the search domain guaranteeing the robust performance of system. And, this PD control system is compared with $\mu$ -synthesis control system for the robust performance. The PD control system designed by the proposed method has not only the robust performance but also the better command tracking performance than that of the $\mu$ -synthesis control system. The effectiveness of this control system is verified by computer simulation.

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