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수직력과 수평력 측정이 가능한 다축 힘 측정 촉각 센서에 관한 연구
황상균(Sang-Kyun Hwang),권오민(Oh-min Kwon),황희윤(Hui-Yun Hwang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Various studies have been carried out on flexible sensors that can simultaneously detect multi axis loads (normal force and horizontal force) acting on the sensors in the field of tactile sensor with a structure in which a sensor fiber was arranged inside polymer matrix materials. These sensors have a form in which sensor fiber: piezoelectric sensor or optical fiber sensor was inserted in ductile materials such as silicon, polyester and PDMS. Among them, various studies have been carried out on the tactile sensor using a piezoelectric sensor, but the basic research on signal characteristics and technique of separation when a multi axis force is detected is lacking. Accordingly, this study manufactured a tactile sensor in which PVDF fiber was inserted in PDMS, which was arranged to detect a multi axis force, and various experiments on performances were conducted so as to understand the performances and characteristics of the sensor. The results obtained from the experiments were compared to the results from a finite element analysis, so that its efficacy was confirmed.
황상균 ( Sang-kyun Hwang ),이정우 ( Jung-woo Lee ),황희윤 ( Hui-yun Hwang ) 한국복합재료학회 2016 Composites research Vol.29 No.6
원추형 복합재 튜브는 우주 항공, 비행체, 잠수함 등 큰 구조물뿐만 아니라 자전거 프레임, 낚시대, 골프채 등 레저용품에도 적용이 되면서 정적-동적 거동에서의 기계적 물성 예측의 중요한 연구 분야로 대두되고 있다. 일반적으로 원추형 복합재 튜브의 기계적 물성 예측은 진동, 굽힘, 좌굴에 관하여 많은 연구가 진행되었지만, 복합재료의 섬유 배향 각이 일정하다고 가정하고 기계적 거동을 분석한 것이 대부분이기 때문에 섬유 배향 각이 원추형 복합재 튜브 구조물의 기계적 물성에 어떠한 영향을 미치는지에 대한 연구가 필요하다. 이에 본 연구에서는 섬유 배향 각을 고려한 원추형 복합재료 튜브의 정적 거동에 따른 기계적 물성을 예측하기 위해 수식을 도출하고, 자전거 프레임에 적용하기 위한 다양한 설계 파라메터의 영향을 고찰하였다. Mechanical properties of static and dynamic behavior became important since the use of conical composite tubes in large structures such as aerospace, planes, and submarines as well as leisure goods such as bicycle frames, fishing rods, and golf shafts. In the past, the mechanical property prediction model for static behavior was studied using vibration, bending, and buckling. But there is a need to study how fiber orientation error affects mechanical properties of conical composite structure because the model assumes constant fiber orientation angle. The purpose of this study is to derive an equation that can predict the static behavior of conical composite tube for bicycle frames by considering fiber orientation error with respect to various design parameters.