액체거동의 비접촉 다점측정을 위한 레이저진동계와 갈바노미터스캐너 계측시스템
Measurement System of Dynamic Liquid Motion using a Laser Doppler Vibrometer and Galvanometer Scanner
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슬로싱과 같은 액체의 동적 거동을 측정하고 제어하는 연구가 다양한 공학분야에서 활발히 진행중이다. 건축공학분야에서도 건축물의 풍진동을 저감시키는 동조액체감쇠기의 연구에 액제 진동이 측정되고 있다. 본 논문에서는 기존 파고 측정센서의 한계를 극복하기 위하여 레이저 장비 중 LDV와 스캐닝 장비 중 갈바노미터스캐너를 이용하여 동조액체감쇠기 내의액체 진동을 측정하는 방법을 제안하고 검증하였다. LDV가 속도와 변위를 측정하는 원리를 기술하였고 갈바노미터스캐너의 구동 원리에 따라 LDV의 단일 포인트로 다점측정이 가능한 시스템을 구성하였다. 동조 액체감쇠기의 4점 액체 진동을측정하여 각 점의 시간 영역 데이터를 기존에 사용하던 비디오 센싱 데이터와 비교하였고 파형 분석을 통해 진행파와 정상파를 구별할 수 있음을 확인하였다. 또한 측정 딜레이가 있는 데이터를 상호 상관을 취하여 특이값 분해를 하고 이론 및 비디오 센싱 결과와 일치하는 고유진동수와 모드형상을 도출하였다.
Abstract
Researches regarding measurement and control of the dynamic behavior of liquid such as sloshing have been actively onundertaken in various engineering fields. Liquid vibration is being measured in the study of tuned liquid dampers(TLDs), whichattenuates wind motion of buildings even in building structures. To overcome the limitations of existing wave height measurementsensors, a method of measuring liquid vibration in a TLD using a laser Doppler vibrometer(LDV) and galvanometer scanner isproposed in this paper: the principle of measuring speed and displacement is discussed; a system of multi-point measurement with asingle point of LDV according to the operating principles of the galvanometer scanner is established. 4-point liquid vibration on theTLD is measured, and the time domain data of each point is compared with the conventional video sensing data. It was confirmedthat the waveform is transformed into the traveling wave and the standing wave. In addition, the data with measurement delay arecross-correlated to perform singular value decomposition. The natural frequencies and mode shapes are compared using theoreticaland video sensing results.
참고문헌 (23)
- Abellán, A., "Application of a Long-range Terrestrial Laser Scanner to a Detailed Rockfall Study at Vall de Núria", Eng. Geol, 88, pp.136~148 (2006)
- Hani, H.N., "Comparison of Laser Doppler Vibrometer with Contact Sensors for Monitoring Bridge Deflection and Vibration", NDT & E Int, 38, pp.213~218 (2005)
- Jan, P.B.V., "Spacecraft Maneuvers and Slosh Control", IEEE Control Syst, 25, pp.12~16 (2005)
- 장석정, "동조액체기둥감쇠기의 동적특성을 파악하기 위한 가변전압측정 시스템 개발", 한국전산구조공학회논문집, 28(3), pp.275~282 (2015), 한국전산구조공학회[DOI]
- 정재환, "Effect of natural frequency modes on sloshing phenomenon in a rectangular tank", International Journal of Naval Architecture and Ocean Engineering, 7(3), pp.580~594 (2015), 대한조선학회
- Kazuaki, S., "A Novel Fused Sensor for Photo- and Ion-sensing", Sens. & Actuators B: Chem, 106, pp.614~618 (2005)
- Kazuhiko, T., "Sloshing Analysis and Suppression Control of Tilting-type Automatic Pouring Machine", Control Eng. Pract, 9, pp.607~620 (2001)
- Ken’ichi, Y., "Robust Liquid Container Transfer Control for Complete Sloshing Suppression", IEEE Trans. Control Syst. Tech, 9, pp.483~493 (2001)
- Ken’ichi, Y., "Sloshing Suppression Control of Liquid Transfer Systems Considering a 3-D Transfer Path", IEEE Trans. Control Syst. Tech, 9, pp.483~493 (2005)
- Ken’ichi, Y., "Motion Control of Liquid Container Considering an Inclined Transfer Path", Control Engineering Practice, pp.465~472 (2002)
- Kim, J.H., "In Situ Measurement of Structural Mass, Stiffness, and Damping using a Reaction Force Actuator and a Laser Doppler Vibrometer", Smart Mater. & Struct, 22, pp.085004~ (2013)
- Kim, J.H., "Autonomous Dynamic Displacement Estimation from Data Fusion of Acceleration and Intermittent Displacement Measurements", Mech. Syst. & Signal Proc, 42, pp.194~205 (2014)
- Kim, J.H., "Easy-to-Tune Reconfigurable Liquid Column Vibration Absorbers with Multiple Cells", Smart Mater. & Struct, 24, pp.065041~ (2015)
- Kim, J.H., "Fast Vision-based Wave Height Measurement for Dynamic Characterization of Tuned Liquid Column Dampers", Measurement, 89, pp.189~196 (2016)
- Kim, K.Y., "Dynamic Displacement Measurement of a Vibratory Object using a Terrestrial Laserscanner", Measurement Sci. & Tech, pp.045002~ (2015)
- Kim, K.Y., "Development and Full-scale Dynamic Test of a Combined System of Heterogeneous Laser Sensors for Structural Displacement Measurement", Smart Mater. & Struct, 25, pp.65015~65028 (2016)
- Lee, S.K., "Experimental Verification on Nonlinear Dynamic Characteristic of a Tuned Liquid Column Damper Subjected to Various Excitation Amplitudes", Struct. Design Tall & Spec. Build, 21, pp.374~388 (2012)
- 이성경, "TLCD와 LCVA의 설계파라미터에 대한 실험적 평가", 한국전산구조공학회논문집, 22(5), pp.403~410 (2009), 한국전산구조공학회
- Motion Control of Open Containers with Slosh Constraints, "Mattias, G.", Lund inst. Tech, 69~75 (1998)
- Mattias, Gr., "Constrained Iterative Learning Control of Liquid Slosh in an Industrial Packaging Machine", IEEE Decision & Control, 5, pp.4544~4549 (2000)
- Min, K.W., "Analytical and Experimental Investigations on Performance of Tuned Liquid Column Dampers with Various Orifices to Wind-excited Structural Vibration", J. Wind Eng.& Ind. Aerodyn, 139, pp.62~69 (2015)
- 신윤수, "레이저진동계를 사용한 동조액체댐퍼의 액체 진동 측정", 한국전산구조공학회논문집, 29(6), pp.513~520 (2016), 한국전산구조공학회[DOI]
- William, P.D., "Average Correlations vs. Coreelated Averages", Bull. Psychonom. Soc, 21(3), pp.213~216 (1983)