• ICROS
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• v.2 no.6
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• pp.14-19
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• 1996

본 해석에서는 새로운 기법을 사용하여 차량의 엔진에 의한 가진력이 차체에 최소한으로 전달되도록 엔진마운트의 최적 위치와 마운트의 강성을 결정하였다. 차량은 엔진과 차체 및 Suspension이 고려되어 16 자유도계로 모델링하였으며 각각의 입력 자료에 의하여 계산된 응답에 의하여 구한 마운트의 위치와 마운트의 강성을 통하여 엔진으로부터 차체로 전달되는 전달력을 최소화하는 마운트의 위치 및 강성의 최적화를 수행하였다.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.673-675
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• 2011

고무는 소재의 탄성 회복 능력과 감쇄 능력, 수밀성의 우수성으로 인해 여러 기계산업의 부품으로 사용되어 지고, 자동차 부품으로는 마운트와 범퍼 등의 충격해소를 위하여 설계되어지고 있다. 본 논문에서는 승차감에 영향을 주는 내부 소음 및 진동의 원인인 엔진의 떨림현상을 감쇄시키기 위한 부품인, 엔진마운트의 고무 모형을 CATIA 프로그램을 사용하여 모델링하였고, ANSYS 12.0 프로그램으로 진동과 하중을 주어 변화량을 측정하여 상용차에 맞는 엔진마운트의 최적설계를 방향을 제시하였다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.11
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• pp.953-960
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• 2021

Korea Astronomy and Space Science Institute has been verifying the multipurpose laser tracking system with three functions of satellite laser tracking, adaptive optics and space debris laser tracking for not only scientific research but also national space missions. The system employs an optical telescope consisting of a 100 cm primary mirror and an altazimuth mount for fast and precise tracking. The precise pointing and tracking capability in a tracking mount is considered as one of important performance metrics in the fields of automatic tracking and precise application research. So it is required to analyze a mount model for investigating pointing error factors and compensating pointing error. In this study, we investigated various factors causing static pointing errors of tracking mount and analyzed the pointing accuracy of the tracking mount at Geochang observatory by estimating mount parameters based on the least square method.

• Journal of the Korea Convergence Society
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• v.11 no.11
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• pp.203-209
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• 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.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.9
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• pp.2505-2513
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• 1996

This paper presents the analysis of the impedance characteristic of the strip type waveguide mount backed by the dielectric substrate using mode the matching and induced EMF method. The part of the waveguide containing the dielectric substrate is modeled as waveguide partially filled with the dielectric, and a hybrid mode analysis has been conducted for the structure. The electromagnetic scattering problem by the dielectric substrate is solved by the mode matching method using the calculated modal function. The input impedance seen at the mount gap is calculated by the induced EMF method using the calculated results. the calculated results thus obtained has been verified through comparison with the results by other numerical methods. The effect of some structure parameters such as the width of the substrate and the gap size on the mount impedance is investigated.

• The Korean Journal of Rheology
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• v.11 no.2
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• pp.97-104
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• 1999

This paper presents vibration control of a drive feeding system consisting of a new type of CD-ROM(compact discread only memory) mount using electro-rheologocal(ER) fluid. Chemically treated starch particles and silicon oil are used for ER fluid. and its field-dependent yield stresses are experimentally distilled under both the shear and the flow modes. On the basis of the yield stress, an appropriate size of ER CD-ROM mount adapted to conventional feeding system is designed and manufactured. Vibration isolation performance of the proposed mount is evaluated in the frequency domain and compared with that of conventional rubber mount. The ER CD-ROM mount is then installed to the drive feeding system and the system equation of motion is derived. Following the formulating the sky-hook controller, computer simulation is undertaken in order to evaluate vibration suppression of the feeding system subjected to various disturbances(excitations).

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.10a
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• pp.190-191
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• 2009

• Transactions of the Korean Society of Mechanical Engineers
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• v.10 no.5
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• pp.689-697
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• 1986

In the present work a three degree of freedom modeling of a cylindrical rubber element is studied and its applications to an engine mount system are discussed using a simple test structure. The three degree of freedom model for the rubber mount is composed of three mutually orthogonal springs and dampers jointed at the elastic center of the mount. The test structure is designed and manufactured so simple that its mass center and moment of inertia are accurately and easily obtained. The dynamic properties of each rubber mount, i.e., complex stiffnesses, are experimentally identified using hydraulic exciter and used to predict the modal parameters of the test structure mount system by analytical modal analysis. The predicted modal parameters of the system agree well with those estimated by experimental modal analysis. Hence the three DOF model of the rubber mount is proposed for the practical design of an engine mount system.

• Journal of the korean Society of Automotive Engineers
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• v.10 no.2
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• pp.39-45
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• 1988

The analytical model of an engine mount system with six degrees of freedom is identified using the modal parameters obtained from the experimental modal analysis. The structural parameters, mass moment of inertia of the engine block and stiffness of the rubber mounts, of the engine mount system are determined by using the condition that the estimated model parameters should satisfy the corresponding eigenvalue problem. The simulated modal parameters of the identified analytical model are in good agreement with the measured modal parameters.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.10
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• pp.915-921
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• 2017

Recently, studies to reduce vibration and noise of automobiles have been actively conducted. However, previous studies did not concentrate on the optimization of the mount system with passive or active mounts. This study analytically studies an active mounting system with three active structural paths between source and receiver and the feasibility has been verified. Active mounting system has a coupled structure of piezoelectric stack actuators and passive mounts. A dynamic model of the whole system is prepared and the control force and phase of the stack actuators in each path are determined to target full isolation of each path. Its performance on vibration attenuation is investigated and based on it, optimized combinations of passive and active paths for the best attenuation are presented.