• Title/Summary/Keyword: 하이브리드 진동제어

Search Result 73, Processing Time 0.033 seconds

Experimental Investigation on Vibration Control Performances of the Piezoelectric Hybrid Mount (압전 하이브리드 마운트의 진동제어 성능에 대한 실험적 고찰)

  • Han, Young-Min
    • Journal of the Korea Convergence Society
    • /
    • v.11 no.11
    • /
    • pp.203-209
    • /
    • 2020
  • A hybrid mount featuring rubber element and piezoelectric actuator is devised to reduce vibration when starting a vehicle engine. As a first step, a passive mount adopting rubber element is manufactured and its dynamic characteristics are experimentally evaluated. After evaluating dynamic characteristics of the manufactured inertial piezoelectric actuator, the proposed hybrid mount is then established by integrating the piezoelectric actuator with the rubber element for performance improvement at non-resonant high frequencies. A mathematical model of the established active vibration control system is formulated and expressed in the state space form. Subsequently, sliding mode controller (SMC) is designed to attenuate the vibration transmitted from the base excitation. Finally, control performances of the proposed hybrid mount are evaluated such as transmissibility in frequency domain and time responses.

Vibration Control of Rotor (회전체의 진동제어)

  • 하향태랑
    • Journal of the KSME
    • /
    • v.35 no.10
    • /
    • pp.917-923
    • /
    • 1995
  • 회전체 진동은 주로 밸런싱에 의해 줄일수 있지만 위험속도에서 나타나는 회전체 진동은 종종 피할 수 없다. 전자기 베어링은 이러한 회전체 진동을 능동적으로 제어하는 방법으로써 사용된다. 비접촉으로 회전체에 힘을 작용하는 동흡진기(dynamic vibration absorber)는 기존의 것에 비해 새로운 것을 필요로 하지 않는 아주 간단한 방법이다. 영구자석으로 구성된 자석 댐퍼는 비접 촉동흡진기의 일종이지만 영구자석만으로는 적절한 감쇠 성능을 만족시킬 수 없다. 따라서 영 구자석과 전자석을 동시에 사용하는 하이브리드 자석이 넓은 운전영역에서 좋은 진동제어 성능을 자지기 때문에 유용하다. 전력공급의 편리성을 위해서 하이브리드 자석을 합진기쪽에 설치하고 여러 개의 편으로 된 영구자석은 회전체의 주위에 부착하였다. 본 연구의 목적은 수직 회전 체(vertical rotor)의 진동을 제어하기 위해서 전자기력을 이용하는 하이브리드 관성 댐퍼를 개 발하는 것이다. 지금까지 전자석을 이용한 진동제어는 여러 저자에 의해 연구되어 왔으며 자기 베어링은 회전체의 진동을 제어하기 위한 전형적인 예이다. 그러나 회전체에 능동관성 댐퍼를 직접 적용한 예는 없었다. 이동흡진기는 전자석의 반발력(repulsive force)을 이용하고 흡진기의 운동에 의해 에너지가 감쇠된다. 반면에 자기 베어링에서는 전자석의 흡인력(attractive force)을 이용한다.

  • PDF

Vibration Control of Intelligent Structures via ER Fluids and Piezoelectric Film Actuators (전기유동유체와 압전필름 액튜에이터를 이용한 지능구조물의 진동제어)

  • 박용군;최승복
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 1995.10a
    • /
    • pp.249-253
    • /
    • 1995
  • 본 연구에서는 잠재적 응용성이 큰 ER유체와 압전필름을 액튜에이터로 하는 하이브리드형 지능구조물을 제안한 후 능동 진동제어를 실시하였다. 먼저 중공(hollow)의 샌드위치 형태 복합재료(glass/epoxy)보에 ER유체와 압전필름을 각각 삽입과 접착을 하여 하이브리드형 지능구조물을 제작하였다. 그리고 각 매체의 액튜에이팅 특성을 고려하여, ER유체 액튜에이터(ERFA)는 전장부하 함수로 도출되는 구조물의 주파수응답을 특징으로 하였고, 압전필름 액튜에이터(PFA)는 신경 슬라이딩 모드 제어기 (neuro sliding mode controller : NSC)를 적용하였다. 이 두 액튜에이터가 동시에 작동하는 능동 진동제어계를 실험적으로 구현한 후 과도응답과 강제 응답에 대한 진동제어 성능을 단일 액튜에이터 작동시와 비교 고찰하여 제시된 하이브리드 액튜에이팅의 효과를 입증하였다.

  • PDF

Active Vibration Control Using Piezostack Based Mount (압전작동기 마운트를 이용한 능동진동제어)

  • Nguyen, Vien-Quoc;Choi, Sang-Min;Paeng, Yong-Seok;Han, Young-Min;Choi, Seung-Bok;Moon, Seok-Jun
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.18 no.4
    • /
    • pp.386-392
    • /
    • 2008
  • This paper presents active vibration control performance of a hybrid mount. The proposed hybrid mount is devised by adopting both piezostack as an active actuator and rubber as a passive element. After experimentally identifying actuating force characteristics of the piezostack and dynamic characteristics of the rubber, the hybrid mount was designed and manufactured. Subsequently, a vibration control system with a specific mass loading is constructed, and its governing equations of motion are derived. In order to actively attenuate vibration transmitted from the base, a feedforward controller is formulated and experimentally realized. Vibration control responses are then evaluated in time and frequency domains.

Fuzzy control of hybrid base-isolator with magnetorheological damper and friction pendulum system (MR 감쇠기와 FPS를 이용한 하이브리드 면진장치의 퍼지제어)

  • Kim, Hyun-Su;Roschke, P.N.;Lin, P.Y.
    • Journal of the Earthquake Engineering Society of Korea
    • /
    • v.9 no.1 s.41
    • /
    • pp.61-70
    • /
    • 2005
  • Shaking table tests are carried out on a single-degree-of-freedom mass that is equipped with a hybrid base isolation system. The isolator consists of a set of four specially-designed friction pendulum systems (FPS) and a magnetorheological (MR) damper. The structure and its hybrid isolation system are subjected to various intensities of near- and far-fault earthquakes on a large shake table. The proposed fuzzy controller uses feedback from displacement or acceleration transducers attached to the structure to modulate resistance of the semi-active damper to motion. Results from several types of passive and semi-active control strategies are summarized and compared. The study shows that a combination of FPS isolators and an adjustable MR damper can effectively provide robust control of vibration for a large full-scale structure undergoing a wide variety of seismic loads.

LQG Hybrid Vibration Control of a Structure Using TMD (Tuned Mass Damper(TMD)를 이용한 구조물의 Linear Quadratic Gaussian(LQG) 하이브리드 진동제어)

  • Lee, Jin-Ho;Lee, Sang-Beom
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.10 no.4
    • /
    • pp.108-118
    • /
    • 2006
  • The purpose of this study is to investigate the effectiveness of a LQG Hybrid controller to suppress the earthquake disturbance for the building structure. The ground acceleration of N-S component of El-Centro earthquake was scaled to confirm that the building behaved within the elastic range. The tuned mass damper(TMD) on the top floor regulated by LQG algorithm was designed to control the floor displacements. The displacement responses of the hybrid control were compared with those obtained from an active control along with a passive control. The results showed that the LQG hybrid control used approximately 50% less input forces than an active control to satisfy the performance criteria.

Evaluation of Vibration Control Performance for Active Hybrid Mount System : Experimental Investigation (능동 하이브리드 마운트 시스템의 진동제어 성능 평가 : 실험적 고찰)

  • Oh, Jong-Seok;Choi, Seung-Bok;Nguyen, Vien Quoc;Moon, Seok-Jun;Choi, Sang-Min
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.21 no.5
    • /
    • pp.455-460
    • /
    • 2011
  • In this work, an active hybrid mount using piezostack actuator and rubber element is manufactured, and its vibration control performance is evaluated via feedforward control. A hybrid active mount featuring inertia type of piezostack actuator is proposed and manufactured. After describing the configuration of the hybrid mount, a mount system is then constructed. To attenuate vibrations from vibration sources, a feedfoward controller is experimentally implemented to the system. Vibration control performances are evaluated at each mount. Effective control performances such as accelerations are obtained and presented in frequency domains.

Evaluation of Vibration Control Performance for Active Hybrid Mount System : Experimental Investigation (능동 하이브리드 마운트 시스템의 진동제어 성능 평가 : 실험적 고찰)

  • Oh, Jong-Seok;Choi, Seung-Bok;Quoc, Nguyen Vien;Moon, Seok-Jun;Choi, Sang-Min
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2011.04a
    • /
    • pp.85-90
    • /
    • 2011
  • In this work, an active hybrid mount using piezostack actuator and rubber element is manufactured, and its vibration control performance is evaluated via feedforward control. A hybrid active mount featuring inertia type of piezostack actuator is proposed and manufactured. After describing the configuration of the hybrid mount, a mount system is then constructed. To attenuate vibrations from vibration sources, a feedforward controller is experimentally implemented to the system. Vibration control performances are evaluated at each mount. Effective Control performances such as accelerations are obtained and presented in frequency domains.

  • PDF

Performance Evaluation on an Active Hybrid Mount System for Naval Ships Using Piezostack Actuator (압전작동기를 이용한 함정용 능동 하이브리드 마운트 시스템의 진동제어 성능 평가)

  • Quoc, Nguyen Vien;Choi, Seung-Boh;Oh, Jong-Seok
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.21 no.1
    • /
    • pp.24-30
    • /
    • 2011
  • In this work, a new active hybrid mount featuring piezostack actuator and rubber element is proposed, and its vibration control performance is evaluated by applying a robust frequency-shaped sliding mode controller. After describing the configuration of the proposed mount, vibration control performances are experimentally evaluated. A mount system with four active hybrid mounts is then constructed. To attenuate vibrations on the supported mass, a frequency-shaped sliding mode controller is designed and implemented to the system. Finally, control performances are obtained and presented in time and frequency domains via computer simulation.