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Fiber Bragg Grating 센서를 이용한 저진동 가속도계 개발
백인석(In Seok Pack),강한빈(Han Bin Kang),이계광(Kye Kwang Lee),이석순(Seok Soon Lee) Korean Society for Precision Engineering 2012 한국정밀공학회지 Vol.29 No.10
Accelerometers play a key role in the structural assessment. However, the current electric type accelerometers have certain limitations to apply some structures such as heavy cabling labor, installed sea structure and sensitivity to electromagnetic fields. An optical Fiber Bragg Grating (FBG) accelerometer has many advantages over conventional electrical sensors since their immunity to electromagnetic interference and their capability to transmit signals over long distance without any additional amplifiers, and there is no corrosion from sea water. In this paper, we have developed a new FBG-based accelerometer. The accelerometer consists of two cantilevered type beams and a mass and two rollers. A bragg grating element is not directly glued to a cantilever to avoid possible non-uniform strain in the element. Instead, the bragg grating element will be attached to rotation part that rolled inducing vertical movement of the mass and support cantilever beams so that the bragg grating element is uniformly tensioned to achieve a constant strain distribution. After manufacturing, we will prove the performance and the natural frequency of the accelerometer through the experiment with a vibration shaker. The FBG-based accelerometer is developed for measuring the vibration not exceeding 50 ㎐ for the marine and civil structures.
MADYMO를 이용한 폭발 하중에 따른 인체 상해평가 및 분석
최호민(Ho-Min Choi),김재기(Jae-Ki Kim),백인석(In-Seok Pack),이인영(In-Young Lee),권대령(Dae-Ryeong Kwon),이석순(Seok-Soon Lee) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.1
There is a need for explosion experiments for explosion-related research. However, there are many restrictions in performing an actual experiment. Therefore, in this paper, an alternative method of overcoming the constraints of an explosion experiment has been conducted using a passenger behavior analysis program called MADYMO to assess and analyze the human body injury due to explosion load. To increase the reliability of the analysis, a drop test has been conducted with the analysis. We provide a new framework for performing the analysis. In future, we will further develop our research with the goal of reducing the opportunity cost for the study of the human body injury.
이동욱(Lee Dong-Wook),강한빈(Kang Han-Bin),백인석(Pack In-Seok),송주한(Song Ju-Han),박민혁(Park Min-Hyeok),이석순(Lee Seok-Soon) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5
Displacement measurement system using fiber optical common-pathinterferometry method was developed. The measurement system is made with fiber opticaldevices and a collimeterattached on a linear translation stage. The interferometry effect was detected with a phpto detector and its signal was measured on an oscilloscope. During the measurement experiment, wefound that the vibration effect in the stage caused the signal disturbance due to the nanoscale interference effect. In the stable experiment condition, we got that the measured distance was the almost the same as the given value in the linear translate stage.
유한요소해석을 이용한 오일리스 베어링의 분말 압축 성형에 관한 시뮬레이션
박민혁(Min-Hyeok Park),강한빈(Han-Bin Kang),송주한(Ju-Han Song),백인석(In-Seok Pack),이동욱(Dong-Ug Lee),김덕주(Duk-joo Kim),이석순(Seok-Soon Lee) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.2
In this study, simulation on the powder compression forming of oilless bearing is performed and the analysis results are compared with the actual products. This study aims to examine the suitability of powder compression for bearing by using FEA(finite element analysis) before full-scale production. The lubrication state can be predicted by changing the coefficient of friction in order to get the optimal density gradient. Analysis for single and double action presses are performed and these results are compared with each other. State and process of optimal lubrication are proposed from the study result.