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관성형 작동기를 이용한 능동 하이브리드 마운트 시스템의 진동제어 성능 평가
오종석(Oh, Jong-Seok),최승복(Choi, Seung-Bok),벤큐오(Nguyen, Vien Quoc),문석준(Moon, Seok-Jun) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.8
This work presents an experimental investigation on vibration control of the active hybrid mount system for naval ships. To reduce unwanted vibrations, this paper proposes an active mount which consists of rubber element, piezostack actuator and inertial mass. The rubber element supports a mass. The piezostack actuator generates a proper control force and supply it to the mount system. To avoid being broken piezostack actuator, an actuator of the proposed mount is devised as an inertial type, in which a piezostack actuator is positioned between inertial mass and rubber element. Vibration control performances of the active mount system are evaluated via experiment. To attenuate the unwanted vibrations transferred from upper mass, the feedforward control is designed. In order to implement a control experiment, the active mount system supported by four active mounts is constructed. For realization of the controller, one-chip board is manufactured and utilized. Subsequently, vibration control performances of the proposed active mount system are experimentally evaluated in frequency domains.
압전작동기 밸브를 이용한 반능동 차량현가장치의 성능 고찰
한철희(Chulhee Han),윤근하(Gun-Ha Yoon),박영대(Young-Dai Park),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.1
This paper proposes a new type of semi-active direct-drive valve(DDV) car suspension system using piezoelectric actuator associated with displacement amplifier. As a first step, controllable piezoelectric DDV damper is designed and governing equation of a quarter-vehicle suspension system consisting of sprung mass, spring, tire and the piezostack DDV damper is constructed. After deriving the equations of the motion, in order to control spool displacement and damping force the skyhook controller is designed and applied. The performance evaluation of the proposed semi-active suspension system is conducted with different displacement of spool. Then, the ride comfort analysis is undertaken in time domain with bump road profile.
압전작동기를 이용한 무인항공기 EO/IR 센서 마운트의 능동 진동 제어
박동현(Park, Dong-Hyun),최승복(Choi, Seung-Bok) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.12
This paper presents an inertia type of piezostack based active mount fur unmanned aero vehicle (UAV) camera system. After identifying the stiffness and damping properties of the rubber element and piezostack a mechanical model of the active mount system is established. The governing equation of mount is then derived and expressed in a state space form. Subsequently, a sliding mode controller which is robust to uncertain parameters is designed in order to reduce the vibration imposed according to the military specification associated with UAV camera mount system operation. Control performances such as acceleration and transmitted force are evaluated through both computer simulation and experimental implementation.
MR 유체와 압전스택을 특징으로 하는 새로운 형태의 능동 엔진마운트 시스템
이동영(Lee, Dong-Young),손정우(Sohn, Jung-Woo),최승복(Choi, Seung-Bok) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.6
An engine is one of the most dominant noise and vibration sources in vehicle systems. Therefore, in order to resolve noise and vibration problems due to engine, various types of engine mounts have been proposed. This work presents a new type of active engine mount system featuring a magneto-rheological (MR) fluid and a piezostack actuator. As a first step, six degrees-of freedom dynamic model of an in-line four-cylinder engine which has three points mounting system is derived by considering the dynamic behaviors of MR mount and piezostack mount. In the configuration of engine mount system, two MR mounts are installed for vibration control of roll mode motion whose energy is very high in low frequency range, while one piezostack mount is installed for vibration control of bounce and pitch mode motion whose energy is relatively high in high frequency range. As a second step, linear quadratic regulator (LQR) controller is synthesized to actively control the imposed vibration. In order to demonstrate the effectiveness of the proposed active engine mount, vibration control performances are evaluated under various engine operating speeds(wide frequency range) and presented in time domain.
Active Vibration Control Using Piezostack Based Mount
벤큐오(Nguyen, Vien-Quoc),최상민(Choi, Sang-Min),팽용석(Paeng, Yong-Seok),한영민(Han, Young-Min),최승복(Choi, Seung-Bok),문석준(Moon, Seok-Jun) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.4
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.
압전작동기를 이용한 함정용 능동 하이브리드 마운트 시스템의 진동제어 성능 평가
벤큐오(Quoc, Nguyen Vien),최승복(Choi, Seung-Boh),오종석(Oh, Jong-Seok) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.1
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.
압전작동기를 이용한 함정용 능동 하이브리드 마운트 시스템의 진동제어 성능평가
벤큐오(Nguyen Vien Quoc),최승복(Seung-Boh Choi),오종석(Jong-Seok Oh) 한국소음진동공학회 2010 한국소음진동공학회 학술대회논문집 Vol.2010 No.10
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.
압전 작동기를 이용한 방향 제어 밸브의 동적 모델링 및 제어
전준철(Jeon, Jun-Cheol),한영민(Han, Young-Min),구오흥(Nguyen, Quoc Hung),최승복(Choi, Seung-Bok) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.10
This paper proposes a new type of high-frequency directional valve controlled by the piezostack actuator associated with displacement amplifier. As a first step, a dynamic model of directional valve which can operate at 200 Hz with a flow rate of 12 litter/min is derived by considering pressure drop and flow force. As a second step, an appropriate piezostack is selected by considering actuation force as well as field-dependent displacement. Subsequently, in order to control spool displacement and flow rate a proportional-derivative(PD) controller is designed based on the 3rd-order valve system. Control performances such as sinusoidal trajectory tracking of the spool displacement in time domain are evaluated. In addition, the field-dependent flow rate is also presented to verify the required performance of the valve system.
압전 작동기를 이용한 방향 제어 밸브의 동적 모델링 및 제어
전준철(Juncheol Jeon),한영민(Young-Min Han),구오흥(Quoc Hung Nguyen),한승훈(Seung-Hun Han),최승복(Seung-Bok Choi) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.10
This paper proposes a new type of high-frequency directional valve controlled by the piezostack actuator associated with displacement amplifier. As a first step, a dynamic model of directional valve which can operate at 200 Hz with a flow rate of 12 l/min is derived by considering pressure drop and flow force. As a second step, an appropriate piezostack is selected by considering actuation force as well as field-dependent displacement. Subsequently, in order to control spool displacement and flow rate a proportional-derivative (PD) controller is designed based on the 3<SUP>rd</SUP>-order valve system. Control performances such as sinusoidal trajectory tracking of the spool displacement in time domain are evaluated. In addition, the field-dependent flow rate is also presented to verify the required performance of the valve system.
고무와 압전작동기를 이용한 하이브리드 마운트의 설계 및 진동제어 응용
육지용(Yook, Ji-Yong),성금길(Sung, Kum-Gil),문석준(Moon, Seok-Jun),최승복(Choi, Seung-Bok) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.5
This paper presents active vibration control using a hybrid mount which consists of rubber element and the piezostack actuator. After identifying stiffness and damping properties of the rubber element and piezoelectric elements, a mechanical model of the hybrid mount is established. The mount model is then incorporated with the vibration system, and the governing equation of motion is obtained in a state space. A sliding mode controller and LQG controller are designed in order to actively attenuate the vibration of the system subjected to various frequencies and small magnitude excitations. Control responses such as acceleration and force transmission through the hybrid mount are evaluated by computer simulation.