• Title/Summary/Keyword: Transfer matrix

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A Study on Dynamic Response Analysis Algorithm for Three Dimensional Structure (3차원 구조물의 동적응답 해석알고리즘에 관한 연구)

  • Moon, D.H.;Kang, H.S.;Choi, M.S.
    • Proceedings of the KSME Conference
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    • 2000.04a
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    • pp.637-642
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    • 2000
  • This paper suggests new analysis algorithm for tile dynamic response of three dimensional structure which is frequently found in pipe line system of plant by the combination of the transfer stiffness coefficient method(TSCM) and Newmark method. Presented analysis algorithm for dynamic response can improve the computational accuracy remarkably owing to advantages of tile TSCM in comparison of transfer matrix method(TMM). Analysis system was modeled as a lumped mass system in this mettled. The analysis algorithm for dynamic response was formulated for the three dimensional structure. The validity of the this method is demonstrated through the results of numerical experiment for simple computational model by the TSCM and TMM.

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Investigation on the Size and Center of Sweet Spot of Golf Club (골프클럽 안정타점영역의 크기와 중심에 관한 연구)

  • 이정윤;마정범;오재응
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.16 no.5
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    • pp.992-998
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    • 1992
  • This paper presents a method for dynamic analysis of golf club. In the analysis, the sweet spot of golf club is defined based on the magnitude of torsional vibration, and transfer matrix method is employed for numerical calculations. It is shown that the calculated natural frequencies, mode shapes and transfer function agree well with the experimental results.

Substructure Analysis of Steering System using Transfer Function Synthesis Method (전달함수합성법을 이용한 스티어링 시스템의 부분구조 해석)

  • Hong, Sung-Kyu;Kim, Do-Youn;Lee, Doo-Ho;Kim, Chan-Mook
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.11a
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    • pp.201-206
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    • 2000
  • In this work transfer function synthesis method based on FRF data of each substructure is investigated for a complex structure composed of many substructures. Though the transfer function synthesis method has superiority to analyze the characteristics of interfaces among substructures effectively, many problems arise in the computation process, especially matrix inversion process. Due to computational problems, the error between the data obtained by test and the predictions through computations is inevitable. So in this paper, computational aspects in the transfer function synthesis method are examined through a steering system problem of passenger car. For the FBS method, frequency response functions of 3 substructures are measured experimentally. Effects of several parameters such as matrix inversion method, connection conditions between substructures and off-diagonal terms on system response are studied numerically.

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Satellite Attitude Control Using Optimal Control Law (최적제어 기법을 이용한 위성의 자세제어)

  • 양재윤;박수홍;조겸래
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.395-400
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    • 1991
  • In spinning satellite, a gyrotorquer generates a control torquer along two orthogonal axes normal to the spin axis of the vehicle. Matrix Fraction Description(MFD) are used to obtain minimal realization of the transfer matrix relating the attitude angles and the rate of rotation of the gimbals of gyrotorquer. In this paper, the Linear Quadratic Gaussian with Loop Transfer Recovery and H.meihodologies are used to design controller for spinning satellite.

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The Analytical Transfer Matrix Method Combined with Supersymmetry: Coulomb Potential

  • Sun, Ho-Sung
    • Bulletin of the Korean Chemical Society
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    • v.28 no.3
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    • pp.408-412
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    • 2007
  • Combining the analytical transfer matrix method with supersymmetry algebra, a new quantization condition is suggested. To demonstrate the efficiency of the new quantization condition, the eigenenergies of the Coulomb potential are analytically derived. The scattering-led phase shifts are also determined and they are the same for all Coulomb potential states. It is found that the new quantization condition is mathematically simple and exact.

Analysis of Pressure Fluctuations in Oil Hydraulic Pipe Network (유압 관로망에서의 압력 맥동 해석)

  • 이일영;정용길;양경욱
    • Journal of Ocean Engineering and Technology
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    • v.11 no.4
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    • pp.152-158
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    • 1997
  • An analyzing method for pressure fluctuations in oil hydraulic pipe network was developed in this study. The object pipe network has multi-branch configuration, and the pipelines of it are composed of steel tubes, flexible hoses. Also, accumulators, orifices and lumped oil volume components are attached on it. Transfer matrix method, in other words impedance method, was used for the analysis. The reliability and usefulness of the analyzing method were confirmed by investigation computed results and experimental results got in this study.

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Vibration Analysis of Induction Motor for Main Coolant Pump (냉각재 순환펌프용 유도전동기의 진동 해석)

  • Hong, Seung-Soo;Koo, Dae-Hyun;Kang, Do-Hyun;Huh, Hyung
    • Proceedings of the KIEE Conference
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    • 1999.07a
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    • pp.312-314
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    • 1999
  • This paper describes the general formulation for free vibration analysis of rotor by the transfer matrix method. For solving structural dynamics problems, it is used the transfer matrix method. The rotor of the induction motor for main coolant pump is regarded as a distributed mass system.

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The Heat Transfer and Thermal Stress Analysis on the Ceramic Core of the Matrix-type Recuperator (MATRIX형 세라믹 열교환기 코아의 열전단 및 열응력해석)

  • Park, Yong-Hwan;U, Chang-Su
    • 연구논문집
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    • s.24
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    • pp.151-159
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    • 1994
  • The heat transfer and thermal stress analysis was performed on the ceramic core of the matrix-type recuperator. The efficiency was calculated as 34% to 65%. Triple-pass arrangement provided higher preheated air temperatures, lower thermal stresses and the increase of pressure drops. Higher temperature gradients and maximum peak stresses appeared on the corners of the ceramic core. The effect of boundary conditions was significant and the use of spring-load sealing mechanism could release thermal stresses.

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Influnce Coefficient of Two-Plane Flexible Rotor Balancing Model Having a Rigid Cylinder (강체 원통을 중아에 갖는 2-보정면 탄성회전체 밸런싱 모델에서의 영향계수)

  • Jun, Oh Sung
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.12
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    • pp.166-173
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    • 1997
  • Influence coefficients on two-plane flexible rotor balancing model are derived by using the transfer matrix method. The model has a rigid uniform cylinder at mid-span of flexible shafts. Both faces of the rigid cylinder are used as the balancing planes. Calculated influence coefficients show that there exist the rotating speed ranges which are useless or insensitive for the balancing. Gyroscopic effect and damping are considered in the study and their effects are discussed.

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A Simple Analysis of the Cylindrical Shell Subjected to a Nonaxisymmetric Load (비축대칭 하중을 받는 원통형 쉘의 단순화 해석)

  • 남문희;이관희
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.13 no.2
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    • pp.179-187
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    • 2000
  • When one considers the property of the axisymmetry, an analysis of an axisymmetric shell subjected to unaxisymmetric loading can be employed to save time and computer memory space. If one considers the Fourier series of the circumference direction of loads and displacements, an axisymmetric tank subjected to a nonaxisymmetric load can be treated as a frame element. Using the Fourier series, the authors derived the stiffness matrix of the cylindrical shell subjected to unaxisymmetric loading by the usual finite element method, and converted the stiffness matrix of a frame element into a transfer matrix by rearranging the stiffness matrix to apply the transfer matrix method. Here the most significant purpose of this paper is to achieve the fewest number of simultaneous equations for analysing an axisymmetric shell subjected to a nonaxisymmetric load. The results of the proposed method of the analysis of the cylindrical shell subjected to a wind load and a water load show no differences when compared to the other methods.

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