• Title/Summary/Keyword: Multi-Body Dynamic Analysis

Search Result 264, Processing Time 0.032 seconds

Dynamic Analysis of an Optical Disk Drive with Dynamic Vibration Absorber (동흡진기를 채용한 광 디스크 드라이브의 동적 해석)

  • 김남웅;김국원;황효균;김동규;이진우;김외열
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2002.10a
    • /
    • pp.867-870
    • /
    • 2002

  • In high-speed optical disk drive, the excitation caused by rotation of a mass-unbalanced disk is a major source of vibration. The vibration can be a disturbance to the servo system, which is sufficient to cause severe failures in the reading and writing process. The vibration also causes users to feel unpleasantness. The vibration reduction is therefore essential for the reliable operation of optical disk drive. One of the approaches to reduce the vibration is a dynamic vibration absorber (DVA). In this paper, we analyze the dynamic behavior of $DVD\pmRW$ combo drive system with DVA through 12_dof rigid multi-body dynamic model. The effective location and the optimal frequency ratio are obtained from the analysis.

  • PDF

Modeling Technique for a Positive and Negative Variable Displacement Swash Plate Hydraulic Piston Pump in a Multibody Dynamics and Multi-Physics Co-Simulation Environment (다물체 동역학과 다중물리 연동 시뮬레이션 환경에서 정/역 가변용량형 사판식 피스톤 펌프의 모델링 기법)

  • Jang, Jin Hyun;Jeong, Heon Sul
    • Journal of Drive and Control
    • /
    • v.16 no.1
    • /
    • pp.36-44
    • /
    • 2019

  • Variable displacement swash plate piston pump analysis requires electric, hydraulics and dynamics which are similar to the one's incorporated in the complex fluid power and mechanical systems. The main variable capacity for the swash plate piston pumps, hydraulics or simple kinematic (swash plate degree, piston displacement) models are analyzed using AMESim, a multi-physics analysis program. AMESim is a multi-physics hydraulic analysis program that is considered good for the environment but not appropriate for environmental analysis for multibody dynamics. In this study, the analytical model of the swash plate type hydraulic piston pump variable capacity is modeled by combining the hydraulic part and the dynamic part through co-simulation of multibody dynamics program (Virtual.lab Motion) and multi-physics analysis (AMESim). This paper describes the whole modeling analysis method on the mechanical analysis of the multi-body dynamics program and how the hydraulic analysis in multi-physics analysis program works. This paper also presents a methodology for analyzing complex fluid power systems.

  • https://doi.org/10.7839/ksfc.2019.16.1.036 인용 PDF KSCI HTML

Dynamic Analysis of Multi-Robot System Forcing Closed Kinematic Chain (복수로봇 시스템의 동력학적 연구-대상물과 닫힌 체인을 형성할때의 문제-)

  • 유범상
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.19 no.4
    • /
    • pp.1023-1032
    • /
    • 1995

  • The multiple cooperating robot system plays an important role in the research of modern manufacturing system as the emphasis of production automation is more on the side of flexibility than before. While the kinematic and dynamic analysis of a single robot is performed as an open-loop chain, the dynamic formulation of robot in a multiple cooperating robot system differs from that of a single robot when the multiple cooperating robots form a closed kinematic chain holding an object simultaneously. The object may be any type from a rigid body to a multi-joint linkage. The mobility of the system depends on the kinematic configuration of the closed kinematic chain formed by robots and object, which also decides the number of independent input parameters. Since the mobility is not the same as the number of robot joints, proper constraint condition is sought. The constraints may be such that : the number of active robot joints is kept the same as mobility, all robot joints are active and have interrelations between each joint forces/torques, two robots have master-slave relation, or so on. The dynamic formulation of system is obtained. The formulation is based on recursive dual-number screw-calculus Newton-Eulerian approach which has been used for single robot analysis. This new scheme is recursive and compact symbolically and may facilitate the consideration of the object in real time.

  • https://doi.org/10.22634/KSME.1995.19.4.1023 인용 PDF

Flexible Multibody Dynamic Analysis of the Wiper System for Automotives (자동차 와이퍼 시스템의 유연 다물체 동역학 해석)

  • Jung, Sung-Pil;Park, Tae-Won;Cheong, Won-Sun
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.34 no.2
    • /
    • pp.175-181
    • /
    • 2010

  • This paper presents the dynamic analysis method for estimating the performance of flat-type blades in wiper systems. The blade has nonlinear characteristics since the rubber is a hyper-elastic material. Thus, modal coordinate and absolute nodal coordinate formulations were used to describe the dynamic characteristic of the blade. The blade was structurally analyzed to find the bending characteristics of the cross section of the blade. According to the analysis results, the blade section is divided into three deformation bodies: rigid, small, and large. For the small deformation body, the modal coordinate formulation is used, while the absolute nodal coordinate formulation is used for the large deformation body. To verify the dynamic analysis result, an experiment was performed. The simulation and experiment results were compared to verify the flexible multi-body dynamic model.

  • https://doi.org/10.3795/KSME-A.2010.34.2.175 인용 PDF KSCI