• 제목/요약/키워드: Pneumatic Active Control

검색결과 34건 처리시간 0.026초

공압능동제어를 이용한 저주파 영역에서의 공압제진대 제진성능 개선에 대한 연구 (Performance Enhancement of Pneumatic Vibration Isolation Tables in Low Frequency by Active Control)

  • 오기용;이정훈;김광준;신윤호
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 추계학술대회논문집
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    • pp.903-908
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    • 2006
  • As environmental vibration requirements on precision equipment become more stringent. use of pneumatic isolators has become more popular and their performance is subsequently required to be further improved. Dynamic performance of passive pneumatic isolators is related to various design parameters in a complicated manner and, hence, is very limited especially in low frequency range by volume of chambers. In this study, an active control technique, so called time delay control which is considered to be adequate for a low frequency or nonlinear system, is applied to a single chamber pneumatic isolator. The procedure of applying the time delay control law to the pneumatic isolator is presented and its effectiveness in enhancement of transmissibility performance is shown based on simulation and experiment. Comparison between passive and active pneumatic isolators is also presented.

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시간지연 제어기법을 이용한 공압 제진대의 저주파 영역에서의 진동 절연 성능 향상 (Performance Enhancement of Pneumatic Vibration Isolator in Low Frequency by Time Delay Control)

  • 오기용;신윤호;이정훈;김광준
    • 한국소음진동공학회논문집
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    • 제16권11호
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    • pp.1100-1107
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    • 2006
  • As environmental vibration requirements on precision equipment become more stringent, use of pneumatic isolators has become more popular and their performance is subsequently required to be further improved. Performance of passive pneumatic isolators is related to various design parameters in a complicated manner and, hence, is very limited especially in low frequency range by chamber volume. In this study, transmissibility behavior of the pneumatic isolators depending on frequency and dynamic amplitude are presented. Then, an active control technique, time delay control, which is adequate for a low frequency nonlinear system, is applied. A procedure of applying the time delay control law to a pneumatic isolator is presented and it's effectiveness in the transmissibility performance is shown. Comparison between passive and active pneumatic isolators is made based on simulation.

시간지연 제어기법을 이용한 공압 제진대의 저주파 영역에서의 진동 절연 성능 향상 (Performance Enhancement of Pneumatic Vibration Isolator in Low Frequency by Time Delay Control)

  • 오기용;신윤호;이정훈;김광준
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 춘계학술대회논문집
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    • pp.837-843
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    • 2006
  • As environmental vibration requirements on precision equipment become more stringent, use of pneumatic isolators has become more popular and their performance is subsequently required to be further improved. Performance of passive pneumatic isolators is related to various design parameters in a complicated manner and, hence, is very limited especially in low frequency range by chamber volume. In this study, transmissibility behavior of the pneumatic isolators depending on frequency and dynamic amplitude are presented. Then, an active control technique, time delay control, which is adequate for a low frequency nonlinear system, is applied. A procedure of applying the time delay control law to a pneumatic isolator is presented and it's effectiveness in the transmissibility performance is shown. Comparison between passive and active pneumatic isolators is made based on simulation.

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Sliding Mode Control for Pneumatic Active Suspension Systems of a One-wheel Car Model

  • Yoshimura, Toshio;Kimura, Ryota
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.1152-1157
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    • 2005
  • This paper is concerned with the construction of an improved sliding mode control for the active suspension system of a one-wheel car model subject to the excitation from a road profile. The active control is composed of the equivalent and the switching controls where an improved sliding surface is proposed. The active control force is generated by operating a pneumatic actuator due to the control signal that constructed by measuring the state variables of the car model and by estimating the excitation from the road profile using the VSS observer. The experimental result indicates that the proposed active suspension system is relatively effective in the vibration suppression of the car model.

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공압능동제어를 이용한 저주파 영역에서의 공압제진대 제진성능 개선에 대한 연구 (Performance Enhancement of Pneumatic Vibration Isolation Tables in Low Frequency by Active Control)

  • 신윤호;오기용;이정훈;김광준
    • 한국소음진동공학회논문집
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    • 제17권1호
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    • pp.72-79
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    • 2007
  • 정밀 장비 운전시 지반진동 절연을 목적으로 널리 사용되는 공압제진대는 정밀 장비에서 요구하는 지반진동 규제의 강화에 따라 보다 개선된 절연성능을 요구받는다. 수동형 공압제진대의 경우, 제진대의 설계 변수들을 이용하여 그 성능을 개선하고 있으나, 제진대의 고유진동수 및 그 부근에서의 절연 성능 향상에는 한계가 있다. 이 연구에서는 진폭 의존성 등의 비선형성을 가지는 공압제진대에 대하여 비선형 강인성 능동제어이론인 시간지연 제어 기법을 적용하여 고유진동수 및 그 부근에서의 절연성능을 향상시키고자 한다. 공압제진대에 시간지연 제어기법을 적용하는 과정 및 능동제어 이론 적용에 따른 절연 성능 향상에 대한 모사실험 결과를 기술하고자 하며, 실험을 통하여 그 유효성 보이고자 한다.

이동 질량을 포함하는 능동형 공압제진대에 대한 시간지연제어기법의 적용 검토 (Examination on Active Pneumatic Vibration Isolation Table with Moving Masses on It by Time Delay Control)

  • 신윤호;문석준;정정훈;김병현
    • 한국소음진동공학회논문집
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    • 제21권9호
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    • pp.858-867
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    • 2011
  • As applying an active control technique to a pneumatic vibration isolation system, the settling time for the payload excitation could be remarkably reduced as well as the improvement of isolation performance for the ground vibration. Some previous researches were dealt with the settling time through the simulation or experiment but, the discussion on the simulation or experimental results including moving parts, such as a XY-stage, on the isolation table rarely exists. As considering the moving part, the dynamic model could be time varying system and in such a case the force imposed on pneumatic vibration isolation table could be described by inertial forces of moving parts according to Newton's 3rd law, the action and reaction law. In this paper, the simulation procedure of the 3-DOF active pneumatic vibration isolation system including moving parts by TDC(time delay control) technique is proposed and the effectiveness through simulation results are also shown.

전자기 액츄에이터를 이용한 진동제어시스템 (A Design of Active Vibration Control System Using Electromagnetic Actuators)

  • 이주훈;전정우;미티카 카라이아니;강동식
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 춘계학술대회논문집
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    • pp.936-939
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    • 2006
  • The pneumatic isolator is widely adopted for anti-vibration of precision measuring and manufacturing equipments. But, when the precision demand on anti-vibration is extreme or the load is moving, the performance of anti-vibration can not meet satisfaction. In these cases, as a complementary, active vibration suppression system can be added for advanced performance. In this paper, an active control system is presented, which uses electromagnetic actuators for vibration suppression. The anti-vibration characteristic of pneumatic isolator is analyzed for system modeling and actuator specifying. The modeling and the 3D dynamic simulation is performed for control system design. For the electromagnetic actuator design, the magnetic flex density and the current-force characteristic analysis are achieved.

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Studies on control mechanism and performance of a novel pneumatic-driven active dynamic vibration absorber

  • Kunjie Rong;Xinghua Li;Zheng Lu;Siyuan Wu
    • Structural Engineering and Mechanics
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    • 제87권2호
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    • pp.117-127
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    • 2023
  • To efficiently attenuate seismic responses of a structure, a novel pneumatic-driven active dynamic vibration absorber (PD-ADVA) is proposed in this study. PD-ADVA aims to realize closed-loop control using a simple and intuitive control algorithm, which takes the structure velocity response as the input signal and then outputs an inverse control force to primary structure. The corresponding active control theory and phase control mechanism of the system are studied by numerical and theoretical methods, the system's control performance and amplitude-frequency characteristics under seismic excitations are explored. The capability of the proposed active control system to cope with frequency-varying random excitation is evaluated by comparing with the optimum tuning TMD. The analysis results show that the control algorithm of PD-ADVA ensures the control force always output to the structure in the opposite direction of the velocity response, indicating that the presented system does not produce a negative effect. The phase difference between the response of uncontrolled and controlled structures is zero, while the phase difference between the control force and the harmonic excitation is π, the theoretical and numerical results demonstrate that PD-ADVA always generates beneficial control effects. The PD-ADVA can effectively mitigate the structural seismic responses, and its control performance is insensitive to amplitude. Compared with the optimum tuning TMD, PD-ADVA has better control performance and higher system stability, and will not have negative effects under seismic wave excitations.

Active Suspension System for a One-wheel Car Model Using Single Input Rule Modules Fuzzy Reasoning

  • Yoshimura, Toshio;Teramura, Itaru
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2004년도 ICCAS
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    • pp.1275-1280
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    • 2004
  • This paper presents the construction of an active suspension system of a one-wheel car model by using fuzzy reasoning. The car model is approximately described by a nonlinear two degrees freedom system subject to excitation from a road profile, and the active control force is constructed by actuating a pneumatic actuator, and the degradation of the performance due to the delay of the pneumatic actuator is improved by inserting a compensator. The fuzzy control is obtained by single input rule modules fuzzy reasoning, and the excitation from the road profile is estimated by using a disturbance observer. The experimental result shows that the proposed active suspension system much improves the performance in the vibration suppression of the car model.

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공압식 능동 엔진 마운트 개발 (Development of Pneumatic Active Engine Mount)

  • 최재용;이우현;김정훈;이동욱
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 추계학술대회논문집
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    • pp.282-283
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    • 2008
  • According to the development of vehicle technique, the improved NVH performance is required in the vehicle which have the high effectiveness and the high output of the powertrain. This vehicle has to be adapted to active engine mounting system to reduce the vibration in accordance with various vehicle information. The pneumatic active engine mounting system is consist with engine mount, solenoid valve, air tank and control unit totally. The important technique of this system is to reduce the vibration by the air pressure. This paper contains the development process of the pneumatic active engine mounting system and confirm the performance of this system test and vehicle test.

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