• 제목/요약/키워드: 유도형 변위센서

검색결과 11건 처리시간 0.024초

유도형 변위 센서의 동적 특성 향상을 위한 이론적 고찰 (A Theoretical Investigation for Improving Dynamic Characteristics of Inductive position sensor)

  • 신우철;홍준희;이동주
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 춘계학술대회 논문집
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    • pp.149-154
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    • 2002
  • In a high speed spindle system, it is very important to monitor the state of rotating rotor. Particularly in active control spindle system, the position sensor must provide feedback to the control system on the exact position of the rotor. In order to monitor the state of a high speed spindle exactly, high accuracy and wide frequency bandwidth of sensors are important. This paper observes the factors which has an effect on dynamic performances of inductive position sensor.

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자기회로 이론을 이용한 링형 다극 유도형 변위센서의 모델링 (Modelling of a Ring-type Multi-pole Inductive Position Sensor Using Magnetic Circuit Theory)

  • 김지미;노명규
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.207-211
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    • 2004
  • The performance of an inductive position sensor has approved by previous research papers. In this paper, magnetic circuit model of a ring-type multi-pole insuctive position sensor is described. The magnetic circuit model is required to design in ductive position sensor as well as draw a fault tolerance algorithm. Using the magnetic circuit theory, we derived the relationship between voltage applied and flux density in the normal air-gap. By idealizing the modulation/demodulation processes of signal processing circuit, sensor gain with respect to change of displacement is theoretically calculation using the magnetic circuit model, which validate the theoretical derivation.

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유도형 변위 센서의 전기 노이즈 분석과 센서 성능에 미치는 영향 고찰 (A Study on Analysis and Effect of Electronic Noise in an Inductive Displacement Sensor)

  • 신우철;홍준희;이동주
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2003년도 추계학술대회
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    • pp.379-384
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    • 2003
  • Noise is a problem in many electronic circuits and active control system. Arising from spuriously coupled noise from other circuits, it corrupts the signal of interest and introduces an uncertainty into information it contains. In this paper, re have researched noise characteristics of the inductive displacement sensor which has been designed. n first present basic concept and characteristics of magnetic field-coupled noise in the sensor output signal. Then, n are present relation noise and sensor performances. Finally, we concentrate low noise design of a sensor driver and a signal detection circuit.

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유도형 탄약의 조종날개 제어용 Sensorless BLDC 전동기 구동시스템 개발 (Sensorless BLDC Motor Control to Drive Fins for Flight Attitude Control of a Guided Artillery Munition)

  • 김상훈;이태형;조창연;박장호;김재호
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2014년도 전력전자학술대회 논문집
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    • pp.49-50
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    • 2014
  • 본 논문에서는 유도형 활공 탄약의 비행경로 제어와 자세유지를 위해 장착된 꼬리 날개 구동을 위한 BLDC 전동기 제어시스템을 개발하였다. 이 시스템에서는 높은 고도에서의 비행 시 압력에 취약한 홀(Hall) 센서와 같은 회전자의 위치 검출 센서를 사용하지 않는 센서리스(Sensorless) 구동 방식을 적용하였다. 측정된 극전압으로부터 상전환 신호를 추출하여 BLDC 전동기의 센서리스 구동을 실현하였으며, 또한 상전환 신호로부터 추정된 속도를 사용하여 속도 제어를 통해 꼬리날개의 변위 명령 추종을 위한 위치 제어를 수행하였다. 실제 구현된 시스템에서의 실험을 통해 개발된 센서리스 제어 알고리즘을 적용하여 위치 제어의 성능이 우수함을 확인하였다.

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고속 주축 상태 모니터링용 유도형 변위 센서의 특성 평가 (Characteristics Evaluation of Inductive Position Sensor for the State monitoring of a High Speed Spindle)

  • 신우철;홍준희;이동주
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 춘계학술대회 논문집
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    • pp.65-68
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    • 2002
  • In a high speed spindle system, it is very important to monitor the state of rotating rotor. Particularly in active control spindle system, the position sensor must provide feedback to the control system on the exact position of the rotor. In order to monitor the state of a high speed spindle exactly, High accuracy and wide frequency bandwidth of sensors are important. This paper describes the factors which has an effect on performances of inductive position sensor. We also report the experimental results that characterize the performances of the inductive position sensor.

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유도형 변위 센서의 민감도 향상을 위한 형상 최적 설계 (Shape Design Optimization of Inductive Position Sensor to Improve Sensitivity)

  • 홍준희;이동주;신우철
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2001년도 추계학술대회(한국공작기계학회)
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    • pp.250-254
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    • 2001
  • The resolution of analog sensor is determined by its sensitivity and amplitude of noise. This paper presents modeling of inductive gap sensor base on equivalent magnetic circuit and analysis of sensitivity. We can simulate static characteristic of inductive gap sensor using this model. Computer simulation show that sensor's sensitivity is affected by magnetic flux's leakage and fringing, and that they are affected by shape of sensor probe. Base on this, we designed shape of inductive position sensor probe.

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자기 베어링 기술을 이용한 유도형 변위센서 개발 (Development of an Inductive Position Sensor Using Magnetic Bearing Technology)

  • 노명규;박병철;노승국;경진호;박종권
    • 한국정밀공학회지
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    • 제21권4호
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    • pp.72-78
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    • 2004
  • In this paper, a development of an inductive position sensor is described. The sensor is similar to a radial magnetic bearing in that the sensor stator is shaped like a heteropolar magnetic bearing and is driven by a switching amplifier. A demodulation filter extracts the gap information from the switching current ripples. A prototype sensor exhibits the resolution of $0.43\mum$ and the dynamic bandwidth of about 800Hz. The dynamic performance can be improved by increasing the switching frequency. However, the eddy current effects become noticeable at high switching frequency, thus limiting the improvement of the bandwidth.

유도형 변위 센서의 모델링 및 해석 (Modeling of Inductive Position Sensor and its Analysis)

  • 신우철;홍준희;이동주
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.249-252
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    • 1997
  • The resolution of analog sensor is determined by its sensitivity and amplitude of noise. This paper presents modeling of inductive gap sensor base on equivalent magnetic circuit and analysis of sensitivity. The model of inductive gap sensor is verified by the experimental results. Then we can simulate static characteristic of inductive gap sensor using this model. Computer simulation show that sensor's sensitivity and linearity are affected by magnetic flux's leakage and fringing, and that they are affected by shape of sensor probe.

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와전류와 히스테리시스를 고려한 유도형 변위 센서의 자기회로 모델 개발 (A Magnetic Circuit Model of Inductive Sensor Considering Eddy Currents and Hysteresis)

  • 노명규;정민경;박병철
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 춘계학술대회 논문집
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    • pp.267-270
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    • 2002
  • The accuracy and the dynamic bandwidth are the two most important indices that an inductive position sensor is evaluated with. Eddy currents and magnetic hysteresis affect both of these performance indices. As the modulation frequency of the sensor increases to improve the dynamic bandwidth, the effects of eddy currents and hysteresis also increases, which results in the loss of accuracy. In this paper, a magnetic circuit model of the differential inductive sensor is developed. This model includes the effects of hysteresis and eddy currents. Experimental results confirm the validity of the model. The model predicts that the eddy current effects are not significant below the modulation frequency of 50kHz, as long as the lamination thickness is adequate.

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항만공사용 로봇의 실린더 길이 측정을 위한 압력 옵서버 개발 (Development of Pressure Observer to Measure Cylinder Length of Harbor-Construction Robot)

  • 김치효;박근우;김태성;이민기
    • 대한기계학회논문집A
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    • 제35권3호
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    • pp.299-308
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    • 2011
  • 본 논문은 항만공사용 로봇의 실린더 길이 측정을 위한 압력 옵서버 개발이다. 로봇의 유압 실린더 제어를 위해 변위 센서가 필요하며 일반적으로 LVDT, 리니어 스케일 등이 사용된다. 이러한 센서는 실린더 외부몸통에 장착되므로 건설현장과 같은 열악한 환경에서 사용할 경우 내구성이 좋지 못하다. 본 논문에서는 압력센서를 이용하여 간접적으로 실린더 길이를 측정한다. 압력센서는 유압 밸브박스 내부에 장착되어 외부충격으로부터 보호되며 방수가 용이하다. 오일을 압축성 매개체로 간주하여 실린더의 위치와 속도 함수인 동적압력 방정식을 유도하고 RLS를 이용하여 실린더가 전진, 후진 리미트에 도달할 때마다 파라미터를 갱신한다.