• 제목/요약/키워드: Linear DC Motor

검색결과 157건 처리시간 0.026초

컴플렉스법에 의한 직접구동형서보밸브의 진상-지상 제어기 설계 (Lead-Lag Controller Design of Direct Drive Servo Valve Using Complex Method)

  • 이성래
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 추계학술대회
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    • pp.1590-1595
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    • 2003
  • Direct drive servovalve(DDV) is a kind of one-stage valve since the rotary motion of DC motor is directly transferred to the linear motion of valve spool through the link. Since the structure of DDV is simple, it is less expensive, more reliable and offers reduced internal leakage and reduced sensitivity to fluid contamination. However, the flow force effect on the spool motion is significant such that it induces large steady-state error in a step response. If the proportional control gain is increased to reduce the steady-state error, the system becomes unstable. In order to satisfy the system design requirements, the lead-lag controller is designed using the complex method that is one kind of constrained direct search method.

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계기용 영구자석형 LDM의 설계제작 및 기본특성 연구 (Design and Analysis of Permanent Magnet Type LDM for Implementation)

  • 김용;백수현
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제48권2호
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    • pp.56-62
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    • 1999
  • This paper is concerned with the design and the construction of a moving magnet type linear DC motor(MM type LDM) for instrumentation. A mathematical model for the design of a LDM is developed and a permeance method is used to calculate the effective flux density in the air gap. The flux distribution in the air gap is analyzed and the width of iron core should be determined in order not to saturate the iron core by caluclating maxmum flux density. The design data culculated by a permeance method are compared with the analyzed results using FEM(MAXWELL 2D). The errors between two results are corrected. The tested LDM is constructed using the corrected design data. The results of experiment for thrust characteristics are compared with simulation.

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베어링 무장착 횡자속 선형 유도 구동기의 부상력/추력 연성 보상 알고리즘

  • 윤형진;한영희;정광석;백윤수
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 춘계학술대회 논문요약집
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    • pp.183-183
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    • 2004
  • 기능적/공간적 통합 원리를 이용하여 기존 Multi-coordinate 드라이브 모듈들을 통합 구현하려는 시도들이 보고되고 있다. 본 논문에서는 선형 유도 구동기에서 에지 효과를 줄이기 위해 개발된, 이동 자장의 방향과 폐자로의 방향이 수직인 횡자속 선형 유도 구동기(TFLIM)를 대상으로 이러한 통합 원리를 이용하여 구동기에 인가되는 3상 입력을 조절하여 공극의 자기 상호 작용에 기인하여 부수적으로 발생되는 흡인력/부상력을 능동적으로 이용할 수 있는 방법을 제안한다.(중략)

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스위치모드 콘버어터에 의한 슬립전력 회수시스템 (Slip Power Recovery System by Switch Mode Converter)

  • 황영문;추영배;박한웅;김정홍
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 하계학술대회 논문집 A
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    • pp.221-223
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    • 1997
  • This paper deals with the slip power recovery system using switch mode converter in the inverter DC side, which recovers slip power of induction machine to AC line with the aid of the boost converter. As a results, the motor speed can be controlled by the duty ratio of boost switch, not by inverter firing angle. This results that the reactive power produced by phase controlled inverter and diode rectifier can be greatly reduced and linear speed regulation can be obtained. Moreover, the harmonic components of line current caused by the commutation in inverter and rectifier can be considerably suppressed. Therefore, most of the problems in conventional system can be solved.

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부하를 고려한 LDM의 동특성 해석에 관한 연구 (Design and Dynamic Analysis of LDM by using FE Analysis)

  • 강규홍;염상부;홍정표;김규탁;정중기;하근수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 A
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    • pp.164-166
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    • 1999
  • In this study, dynamic analysis of Linear DC motor has been performed. Dynamic characteristic is carried out from coupling the electrical circuit equation and mechanical kinetic equation. Trust constant and circuit parameters are obtained by FE analysis and static characteristic experiment. From the previous results, dynamic analysis is performed and the appropriateness of analysed result is verified by comparing with experimental result.

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외란에 강인한 I-PD 제어에 의한 LDM의 동특성 개선 (Improvement of Dynamic Characteristic of LDM by Using I-PD Algorithm)

  • 김상원;백수현;윤신용;명노용;장홍순
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.754-756
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    • 2000
  • In this paper, the I-PD control algorithm using the coefficient diagram method(CDM) controller design of the Linear DC Motor(LDM) is presented. Recently LDM has been used to obtain the fine results of the dynamic characteristic for straightly moving condition. The I-PD control algorithm has a robust response to force disturbance. The effectiveness of I-PD is shown by simulations and comparison with PID.

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ART2 신경회로망을 이용한 선형 시스템의 다중고장진단 (Multiple faults diagnosis of a linear system using ART2 neural networks)

  • 이인수;신필재;전기준
    • 제어로봇시스템학회논문지
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    • 제3권3호
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    • pp.244-251
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    • 1997
  • In this paper, we propose a fault diagnosis algorithm to detect and isolate multiple faults in a system. The proposed fault diagnosis algorithm is based on a multiple fault classifier which consists of two ART2 NN(adaptive resonance theory2 neural network) modules and the algorithm is composed of three main parts - parameter estimation, fault detection and isolation. When a change in the system occurs, estimated parameters go through a transition zone in which residuals between the system output and the estimated output cross the threshold, and in this zone, estimated parameters are transferred to the multiple faults classifier for fault isolation. From the computer simulation results, it is verified that when the proposed diagnosis algorithm is performed successfully, it detects and isolates faults in the position control system of a DC motor.

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해석적 Bode 방법에 의한 직접구동형서보밸브의 고전적 제어기 설계 (Classical Controller Design of Direct Drive Servo Valve Using Analytical Bode Method)

  • 이성래;최현영;문의준
    • 대한기계학회논문집A
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    • 제26권4호
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    • pp.754-763
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    • 2002
  • Direct drive servovalve(DDV) is a kind of one-stage valve since the rotary motion of DC motor is directly transferred to the linear motion of valve spool through the link. Since the structure of DDV is simple, it is less expensive, more reliable and offers reduced internal leakage and reduced sensitivity to fluid contamination. However, the flow force effect on the spool motion is significant such that it induces large steady-state error in a step response. If the proportional control gain is increased to reduce the steady-state error, the system becomes unstable. In order to satisfy the system design requirements, the classical controller is designed using the analytical Bode method.

Flow Interaction of Shedding Vortex with Injected Normal Blowing

  • ;이창진;구희석
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2012년도 제38회 춘계학술대회논문집
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    • pp.239-243
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    • 2012
  • This paper is concerned with turbulent flow computations using Large Eddy Simulation (LES) and the flow interaction of vortex shedding in a cylindrical duct flow driven by mass blowing through the wall. The purpose is to analyze non-linear combustion characteristics in the presence of vortex shedding generated in a hybrid rocket motor. Experimental studies have shown sudden changes in pressure (referred as a DC-shift), which depend on the strength of vortex strength of incoming flow. The combustion instability because of a sudden change in pressure fluctuations is mainly related with the interaction between vortex shedding. Therefore LES computation on a duct with injected normal blowing was performed to simulate the turbulent flow interactions with the behaviors of vortices and vortex structures along the injected wall.

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직류전동기에서 저주파 부하외란에 강인한 선형 모델추종제어기 설계 (Design of Linear Model Following Controller to Reject Low Frequency Load Disturbance in DC Motor)

  • 윤경섭;이치환;권우현
    • 전자공학회논문지T
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    • 제35T권1호
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    • pp.82-89
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    • 1998
  • PI제어기는 서보시스템에 널리 사용되어 왔다. 그러나 PI제어기로 설계된 시스템응답은 부하변동과 같은 외란이나 시스템 변수의 변화에 대하여 원하는 시간응답을 보존할 수가 없다. 따라서 시간응답 특성의 견실성을 확보하면서, 구현상의 어려움을 해결하기 위하여 선형요소만으로 구성되는 선형 모델추종제어(LMFC: linear model following control) 방법이 있다. 이 방법은 기준모델의 출력을 플랜트가 추종하도록 제어하는 것으로, 플랜트의 구조적 섭동에 무관한 시간응답 특성을 얻을 수 있으나 부하토크에 대한 응답속도가 느린 단점이 있다. 이러한 단점을 해결하기 위하여 모델추종제어기에 강인성향상기를 보조모델을 사용하여 도입함으로써 지주파 부하토크에 대한 응답속도를 향상시켰다. 제안된 제어기(RMFC: LMFC with robust enhancer)는 저주파 부하토크에 대하여 LMFC보다 강인한 특성을 보였으며 시뮬레이션 및 TMS320C30 DSP 시스템에 의한 실험으로 검증하였다.

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