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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Korean Society for Noise and Vibration Engineering
Journal Basic Information
Journal DOI :
The Korean Society for Noise and Vibration Engineering
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Volume & Issues
Volume 20, Issue 12 - Dec 2010
Volume 20, Issue 11 - Nov 2010
Volume 20, Issue 10 - Oct 2010
Volume 20, Issue 9 - Sep 2010
Volume 20, Issue 8 - Aug 2010
Volume 20, Issue 7 - Jul 2010
Volume 20, Issue 6 - Jun 2010
Volume 20, Issue 5 - May 2010
Volume 20, Issue 4 - Apr 2010
Volume 20, Issue 3 - Mar 2010
Volume 20, Issue 2 - Feb 2010
Volume 20, Issue 1 - Jan 2010
Selecting the target year
Numerical Analysis of Transmission Loss Prediction in High Speed Trains
Kim, Tae-Min ; Kim, Jeung-Tae ; Kim, Jung-Soo ; Kim, Soo-Young ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 703~709
DOI : 10.5050/KSNVE.2010.20.8.703
An analysis tool for predicting transmission loss in high speed trains based on combined use of the statistical energy analysis and the finite element methods has been proposed. The analysis utilizes a commercially available numerical solver VA ONE with imbedded NASTRAN module. The proposed analysis tool is first verified by comparing numerically predicted transmission loss of a light rail transport(LRT) structure with experimental results. The comparison shows that the numerically predicted transmission loss is similar to the experimental data. The analysis tool is then applied to the prediction of transmission loss in the high speed train(HST) currently under development. Various sub-structures such as the floor, side panel and ceiling have been numerically analyzed to predict their transmission losses. The results obtained here can be used as input data for predicting the interior noise level of the HST at design stage.
All Stabilizing Disturbance Observer Design for Precise Position Control
Suh, Sang-Min ; Kim, Ha-Yong ; Kim, Kyung-Ho ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 710~716
DOI : 10.5050/KSNVE.2010.20.8.710
This note represents a new disturbance observer to reduce effects of external disturbances. In case of conventional disturbance observers, additional stabilizing filters, so-called Q-filter, should be used because the conventional ones don`t guarantee stability. But, the proposed one doesn`t need the stabilizing filter, which is a fundamentally different research result from previous methods. Experimental verifications show this approach is realizable and valid to enhance precise positioning.
Design of Low Power Consumption Hybrid Magnetic Bearing for Flywheel Energy Storage System
Kim, Woo-Yeon ; Lee, Jong-Min ; Bae, Yong-Chae ; Kim, Seung-Jong ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 717~726
DOI : 10.5050/KSNVE.2010.20.8.717
For the application into a 1 kWh flywheel energy storage system(FESS), this paper presents the design scheme of radial and axial hybrid magnetic bearings which use bias fluxes generated by permanent magnets. In particular, the axial hybrid magnetic bearing is newly proposed in this paper, in which a permanent magnet is arranged in axial direction so that it can support the rotor weight as well as provide a bias flux for axial magnetic bearing. Such hybrid magnetic bearings consume very low power, compared with conventional electromagnetic bearings. In this paper, to stably support a 140 kg flywheel rotor without contact, design process is explained in detail, and magnetic circuit analysis and three-dimensional finite element analysis are carried out to determine the design parameters and predict the performance of the magnetic bearings.
An Experimental Study for the Development of Epoxy Adhesives for Optical Top
Gil, Hyeong-Gyeun ; Youn, Seok-Weon ; Kim, Kwang-San ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 727~733
DOI : 10.5050/KSNVE.2010.20.8.727
Optical tables provide a platform for the establishment and test of measurement systems which use Laser. Therefore, not only static characteristics such as surface flatness, static stiffness and etc. but dynamic response characteristics is very important design parameter. The dynamic stiffness is generally estimated through the modal test, and compliance is used as a representative performance standard. Recently there is an example of defining the dynamic deflection coefficient and using it as a new performance standard of the dynamic stiffness, but it is not generalized yet in industry. In this study, we verify the validity of existing DDC calculus by making an experiment on granite. And for improvement in damping performance of optical tables, we are going to evaluate the effect of fillers on the compliance, then develop an epoxy adhesive based on the result of this experiment.
A Development of an Intake RCV System for the Low Noise Turbo Engine
Lee, Jong-Kyu ; Kim, Jae-Heon ; Kang, Sang-Kyu ; Kang, Koo-Tae ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 734~741
DOI : 10.5050/KSNVE.2010.20.8.734
In this paper, an intake RCV system for low noise turbo engine was developed through optimization process of a geometric path of compressor housing and an open rate of recirculation valve. At first, the critical customer requirement from voice of customer was defined and quality function deployment of an intake RCV system was executed. And then, the renovative concept design using pugh matrix method was selected as final concept for satisfaction of requirement. Simultaneously, system analysis was carried by function diagram and fishbone diagram. Next, control factors and levels for the optimal design were performed. And, the optimal design of an intake RCV system was studied using design of experiment. Conclusively, we achieved not only cancellation tip-out noise at the driving condition but also improvement of NVH commodity through optimization process of an intake RCV system, which is optimal configuration of compressor housing and recirculation valve.
Evaluation on Attenuation for Sound-absorbing Measures of Loud Noisy Work-site using Auralizational Technique
Yun, Jae-Hyun ; Kim, Jae-Soo ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 742~752
DOI : 10.5050/KSNVE.2010.20.8.742
In case of the working machine that using in the loud-noisy workplace, as it generates the loud-noise, it is influencing a physical, mental bad effect to those workers. Accordingly, though the noise countermeasure for the loud-noisy workplace is acutely requiring, until now, those methods that wearing the soundproof-protection tool, or restriction the working hours, and minimize the noise exposure volume, were mainly used. However, such noise countermeasures occur many problem points. On such point of view, using the acoustic simulation technique, let the workers to choose the workplace where suffering many damages due to the noise of working machine, and after grasp the physical property of working machine and indoor acoustic characteristic, this Study has attempted to grasp the reduction degree of noise level at before-improvement?after-improvement, through the sound-absorption measure. Passing through such preceding step, using auralizational technique based on the noise of working machine of before-improvement after-improvement, and by conduct psycho-acoustics evaluation, this study intended to investigate the change degree of subject reaction. As the result of evaluation, it is considering that the noise-reduction countermeasure method for the loud-noisy workplace could be much effective, through the sound-absorption measure.
Lifting Analysis Considering Three Dimensional Dynamic Responses of a Boom based on Finite Element Formulation
Park, Kwang-Phil ; Cha, Ju-Hwan ; Lee, Kyu-Yeul ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 753~760
DOI : 10.5050/KSNVE.2010.20.8.753
In this paper, the lifting analysis of a floating crane with a shipbuilding block is performed. Since floating cranes are operated in ocean waves, six degree-of-freedom motions are considered in the dynamic equations of motions of the floating crane and the block. The boom of the floating crane is considered as an elastic body in the analysis, and is modeled as three dimensional beam based on the finite element formulation. The hydrostatic and hydrodynamic forces by a regular wave are considered as external forces. By solving the equations of motions numerically, the dynamic responses of the floating crane and the block are simulated. The simulation results with different wave directions are compared and the conditions which cause maximum responses are discussed.
Modal Analysis of Human Leg with Respect to Hip Joint Position by Using Multibody Modeling
NamGoong, Hong ; Yoo, Hong-Hee ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 761~766
DOI : 10.5050/KSNVE.2010.20.8.761
The goal of this study is to analysis natural frequency for different static postures of human leg. To perform this research human leg is modeled by multi-body modeling for the musculoskeletal system. This leg model has biarticular muscles which acting on two joints and the muscles represents some of the major muscles, such as hamstring, of the upper and lower limbs. To obtain each static equilibrium position energy method is employed and to analysis natural frequency linearization method for constrained mechanical system is employed. Static equilibrium position depends on some parameter or condition such as hamstring stiffness or external force. Making a change these parameter the aim of this research can be performed.
Performance Evaluation on an Active Camera Mount System for UAV via Hardware-in-the-loop-simulation
Oh, Jong-Suk ; Choi, Seung-Bok ; Cho, Han-Jun ; Lee, Chul-Hee ; Cho, Myeong-Woo ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 767~773
DOI : 10.5050/KSNVE.2010.20.8.767
In the present work, vibration control performance of piezoactuator-based active mount system for unmanned aero vehicle(UAV) equipment is evaluated via hardware in the loop simulation(HILS). At first, the vibration level of UAV is measured and from this vibration data, the proper piezostack actuator is selected. Then, the dynamic model of active mount system including four active mounts and UAV camera equipment is derived. In order to evaluate vibration control performance, the HILS system is constructed. The proposed mount is prepared as hardware part and the other mounts are considered in software part. A sliding mode controller is designed and implemented to the HILS system. Effective vibration control results are presented in both time and frequency domains.
Sound Quality Characteristics for Interior Noise of High Speed Train
Park, Buhm ; Kim, Dong-Kyu ; Jeon, Jin-Yong ; Choi, Sung-Hoon ; Park, Jun-Hong ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 8, 2010, Pages 774~781
DOI : 10.5050/KSNVE.2010.20.8.774
In Korea, the high-speed train is one of the most important mass transportation. Due to its fast speed, the interior noise level is high and it is one of major reason for passenger complaints. In this study, the response of passengers to interior noise was evaluated using sound quality parameters. The effects of various parameters, such as train types, travel speed, rail road, on the calculated sound quality were investigated. The characteristics of interior noise were identified. The obtained results were compared to auditory experimental data. For precise comparison of noises of similar loudness but with different characteristics, paired comparison method was used. From the comparison, important parameters that have influence on the annoyance and loudness of the noise were determined.