[논문]MR Damper의 Gap Size에 따른 제어성능 분석

허광희; 전승곤; 서상구; 김대혁

doi:10.11112/jksmi.2021.25.1.41

[국내논문] MR Damper의 Gap Size에 따른 제어성능 분석
Analysis of Control Performance in Gap Size of MR Damper 원문보기

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.25 no.1, 2021년, pp.41 - 50

허광희 (건양대학교, 해외건설플랜트학과) , 전승곤 (충남도립대학교, 건설정보학과) , 서상구 (충남도립대학교, 건설정보학과) , 김대혁 (건양대학교, 재난안전소방학과)

초록
AI-Helper

본 연구에서는 MR Damper의 제어력을 결정하는 다양한 요인들 중, 유로폭(Gap Size)을 다르게 선정하여 그에 따른 제어력의 변화를 확인하였다. 이를 위해 Gap Size 1.0mm, 1.5mm인 MR Damper 두 대를 제작하고 인가전류와 가진조건을 정하였으며 그에 따른 동하중 실험을 수행하였다. 실험결과 최소제어력은 Gap Size 1.0mm 조건이 Gap Size 1.5mm 조건보다 3.2배 높았으며 최대제어력은 Gap Size 1.0mm 조건이 Gap Size 1.5mm 조건보다 2.3배 높았다. 또한, 인가전류에 따른 제어력의 증가폭은 Gap Size 1.0mm일 때 34N, Gap Size 1.5mm일 때 12.7N으로 나타났다. Gap Size가 커질수록 전체 제어력과 인가전류에 따른 제어력의 증가는 감소하였다. 두 개의 MR Damper의 동적범위를 확인해 본 결과 Gap Size 1.0mm일 때 평균 2.3, Gap Size 1.5mm일 때 평균 2.8인 것을 볼 때 두 MR Damper의 준능동제어장치로써 사용가능성을 확인하였다.

Abstract ▼ AI-Helper

In this study, the flow path width (Gap Size), which is the flow path of fluid, was selected differently among various factors that determine the Ccontrol Force of MR damper, and the change of Control Force was confirmed accordingly. For this purpose, two MR dampers with a Gap Size of 1.0mm and 1.5mm were fabricated, respectively, and dynamic load experiments were conducted according to changes in applied current and vibration conditions The experimental results showed that the minimum Control Force was 3.2 times higher than 1.5mm in the case of 1.0mm Gap Size, and the maximum Control Force was 2.3 times higher than 1.5mm in the case of 1.0mm Gap Size. In addition, the increased width of the Control Force according to applied current was 34N for Gap Size 1.0mm, and 12.7N for Gap Size 1.5mm. As the gap Size increased, the overall Control Force and the increase in the Control Force by the applied current decreased. Next, the dynamic range, which is a performance evaluation index of the semi-active Control device, was 2.3 on average under 1.0mm condition and 2.8 on average under 1.5mm condition, confirming the possibility of utilization as a semi-active Control device.

주제어

표/그림 (20)

그림 Fig. 1 MRF-132DG Yield Stress-Magnetic Intensity Hysteresis Curve
그림 Fig. 2 Concept of MR Damper
그림 Fig. 3 MR Damper / Piston
그림 Fig. 4 Damper Gap Size
그림 Fig. 5 Electromagnet in Piston
그림 Fig. 6 Analytical Models of MR Damper
표 Table 1 Specification of MR Damper and MR Fluid
그림 Fig. 7 Damper Test Equipment Configuration
그림 Fig. 8 Gap Size : 1.0mm - Force & Displacement
표 Table 2 Maximum Control Force by Frequency & Amp [Gap Size : 1.0mm]
그림 Fig. 9 Gap Size : 1.5mm - Force & Displacement
표 Table. 3 Maximum Control Force by Frequency & Amp [Gap Size : 1.5mm]
그림 Fig. 10 Comparison of Experimental and Bingham Modeling Results
표 Table 5 Analysis Results of Bingham Model
표 Table 4 Bingham Model Parameters of MR Damper
그림 Fig. 11 Comparison of Experimental and Power Modeling Results
표 Table 7 Analysis Results of Power model
표 Table 6 Power Model Parameters of MR Damper
그림 Fig. 12 Differences in Damping Forces According to Gap Size
표 Table 8 The Increase and Decrease of Control Performance According to Gap Size Difference (Gap Size 1.0mm to 1.5mm)

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원문보기 상세보기
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상세보기
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