• 제목/요약/키워드: Anti-vibration design

검색결과 116건 처리시간 0.03초

나노 측정시스템을 위한 방진 구조물의 동적 설계에 관한 연구 (A Study on the Dynamic Design of Anti-Vibration Structures for Nano-class Measuring System)

  • 전종균;김강부;백재호
    • 반도체디스플레이기술학회지
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    • 제2권3호
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    • pp.37-43
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    • 2003
  • It is necessary to design the anti-vibration system of precision machinery for a quality assurance. However, in general, the allowable vibration limit is not well known. In this paper, the vibration criteria for foundation of sensitive machinery is proposed and anti-vibration system is designed by using vibration measurement results of foundation. Also, the finite element analysis is performed to verify the effectiveness of the designed anti-vibration system and to determine the allowable dynamic loads of precision measuring system. The results of this study will be helpful for the future design of anti-vibration structures with nano scale measuring system.

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고능률 방진 보링바 개발에 관한 연구 (A Study on the Development of High Efficiency Anti-Vibration Boring Bar)

  • 최춘규;이우영;최성주;이동주
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.109-112
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    • 1995
  • This paper analyzes high efficiency anti-vibration boring bars which increase stability against chatter vibration in boring operations. Structural analysis and mathematical modeling with considering dynamic properties for three types of existing boring bars are performed to search for optimal design parameters. The purpose of this paper is to find out design parameters for high efficiency anti-vibration boring bar.

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전자기 액츄에이터를 이용한 진동제어시스템 (A Design of Active Vibration Control System Using Electromagnetic Actuators)

  • 이주훈;전정우;미티카 카라이아니;강동식
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 춘계학술대회논문집
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    • pp.936-939
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    • 2006
  • The pneumatic isolator is widely adopted for anti-vibration of precision measuring and manufacturing equipments. But, when the precision demand on anti-vibration is extreme or the load is moving, the performance of anti-vibration can not meet satisfaction. In these cases, as a complementary, active vibration suppression system can be added for advanced performance. In this paper, an active control system is presented, which uses electromagnetic actuators for vibration suppression. The anti-vibration characteristic of pneumatic isolator is analyzed for system modeling and actuator specifying. The modeling and the 3D dynamic simulation is performed for control system design. For the electromagnetic actuator design, the magnetic flex density and the current-force characteristic analysis are achieved.

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PND 의 내진특성 개선 (Anti-vibration and Shock-resistant Design for Personal Navigation Device)

  • 황효균;하상우;유승헌;최인호
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 춘계학술대회논문집
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    • pp.861-862
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    • 2008
  • One of trend of portable devices is convergence with other devices, especially with navigation system. This converged system is generally called PND (Personal Navigation Device). This detachable device is developed for personal entertainment in everyday life and navigation system when deriving, so it should meet the specification of vehicle thermal environment, anti-vibration as well as the anti-shock by sudden drop. In this paper, the way to design the hard disk drive damper with CAE, is introduced to get a reliable system from the beginning of the design step.

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슬림형 광 디스크 드라이브의 방진설계 (An Anti-vibration Design of Slim-type Optical Disk Drive)

  • 김남웅;김국원;홍구;정문채;김외열
    • 소음진동
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    • 제9권2호
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    • pp.324-330
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    • 1999
  • With the increase of track density, high rotational speed and the compatibility for various media such as CD-ROM, CD-R/RW, DVD-ROM/RAM/RW etc. in optical disk drive, the effective anti-vibration design is so crucial for robust operaton. Especailly when the drive is self-excited by unbalanced disk, internal sled base vibration and its external transmission to the case bring about so severe problem. Generally these two consideration points the practical anti-vibration design process to control thses two conflictive properties using finite element analysis. As an example of the design process, Duro 25 and 40 visco-elastic rubber mount was selected and analyzed. The stiffness obtained from FEM rubber model was well matched with the experiments. Also it was confirmed that the internal and external vibration induced from unbalanced disk have good agreement with experimental results. The proposed design process is adopted to the slim-type optical disk drive.

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조류발전용 수직축 터빈의 공진 회피 설계를 위한 프로그램 개발 (Development of Vibration Analysis Program for Anti-resonance Design of Vertical-axis Tidal Current Turbine)

  • 배재한;성혜민;조대승;김재호
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2012년도 춘계학술대회 논문집
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    • pp.336-341
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    • 2012
  • The vertical-axis tidal current turbine (VAT) consisting of blades, struts to support blades, shaft, generator and so forth requires anti-resonance design against fluid fluctuation forces generated on blades to ensure its stable operation. In this study, a free vibration analysis program based on the finite element method is developed for efficient anti-resonance design of VAT in the preliminary design stage. In the finite element modeling, the VAT structure components are regarded as beam elements. Added masses due to the fluid and structure interaction of VAT evaluated by empirical formulas are considered as lumped mass elements. In addition, input parameters required for the analysis can be automatically prepared from the principal dimensions of VAT to make anti-resonance design more convenient. The validity of applied methods is verified by the comparison of the numerical results obtained from MSC/Nastran and the developed program for two VAT models.

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극 초정밀 측정시스템의 미진동제어를 위한 구조물의 동적 설계에 관한 연구 (A Study on the Dynamic Design of Structure for Sub-Vibration Control of Precision Measuring System)

  • 김강부;김현식;전종균;김기현
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2001년도 춘계학술대회논문집
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    • pp.863-868
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    • 2001
  • It is necessary to design th anti-vibration system of precision machinery for a sound operation and a quality assurance. However, in general. the allowable vibration limit is not well known. In the paper, the vibration criteria for foundation of vibration sensitive machinery is proposed and anti-vibration system is designed by using vibration measurement results of foundation. Also, the F.E. analysis is performed to verify the effectiveness of a designed anti-vibration system and to determine allowable dynamic load of machinery

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함정용 전술 컴퓨터 콘솔의 방진 (Isolation Mount Design for the Combat Computer Console Installed in Surface Ship)

  • 권병현;김준;김진천;서송호
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2000년도 춘계학술대회논문집
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    • pp.1772-1777
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    • 2000
  • The Combat Computer Consoles installed in surface ships should endure harsh environment such as vibration from engine or propeller and shock from underwater explosion. Generally, commercial isolation mounts are selected and used for anti-vibration and anti-shock design. In this research, the environment of the Combat Computer Console was analyzed first. Selected proper mount was modeled and computer simulation was performed to emulate the environment test. The real environment test was conducted with a manufactured Combat Computer Console. The test results were same as the simulation and satisfied the performance requirements. The computer simulation proved to be a useful design tool to predict the performance before the final environment test.

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다구찌법을 이용한 트랙터 캐빈 방진고무의 형상최적설계 (Shape Optimal Design of Anti-vibration Rubber Assembly in Tractor Cabin Using Taguchi Method)

  • 서지환;이부윤;이상훈
    • 한국기계가공학회지
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    • 제18권4호
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    • pp.34-40
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    • 2019
  • We performed shape optimization of an anti-vibration rubber assembly which is used in the field option cabin of agricultural tractors to improve the vibration isolation capability. To characterize the hyper-elastic material property of rubber, we performed uniaxial and biaxial tension tests and used the data to calibrate the material model applied in the finite element analyses. We conducted a field test to characterize the input excitation from the tractor and the output response at the cabin frame. To account for the nonlinear behavior of rubber, we performed static analyses to derive the load-displacement curve of the anti-vibration rubber assembly. The stiffness of the rubber assembly could be calculated from this curve and was input to the harmonic analyses of the cabin. We compared the results with the test data for verification. We utilized Taguchi's parameter design method to determine the optimal shape of the anti-vibration rubber assembly and found two distinct shapes with reduced stiffness. Results show that the vibration at the cabin frame was reduced by approximately 35% or 47.6% compared with the initial design using the two optimized models.

치수공차가 고려된 광디스크 드라이브의 방진마운트 설계에 관한 연구 (A Study on the Design of Rubber Mount for Anti-vibration of an Optical Disk Drive Considering the Dimensional Tolerance)

  • 김국원;김남웅
    • 한국소음진동공학회논문집
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    • 제12권9호
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    • pp.661-667
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    • 2002
  • With the increase of storage density, high rotational speed and high access technologies in optical disk drive, mechanical issues, mainly noise and vibration, become critical. Up to now the researches of rubber mount for anti-vibration focused on how to calculate the static and the dynamic stiffness of rubber mount and loaned out consideration of the dimensional tolerance of rubber mount for anti-vibration. This paper presents the effects of dimensional tolerance of rubber mount for anti-nitration on the dynamic characteristics of optical disk drive by finite element analysis and dynamic test. The relation between dimensional tolerance and dynamic characteristics of optical disk drive is observed and discussed.