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구속된 다물체시스템의 선형화에 관한 연구

A Linearization Method for Constrained Mechanical System

  • 배대성 (한양대학교 기계공학과) ;
  • 양성호 (한양대학교 대학원 기전공학과) ;
  • 서준석 (한양대학교 대학원 정밀기계공학과)
  • 발행 : 2003.08.01

초록

This research proposes an implementation method of linearized equations of motion for multibody systems with closed loops. The null space of the constraint Jacobian is first pre-multiplied to the equations of motion to eliminate the Lagrange multiplier and the equations of motion are reduced down to a minimum set of ordinary differential equations. The resulting differential equations are functions of ail relative coordinates, velocities, and accelerations. Since the coordinates, velocities, and accelerations are tightly coupled by the position, velocity, and acceleration level constraints, direct substitution of the relationships among these variables yields very complicated equations to be implemented. As a consequence, the reduced equations of motion are perturbed with respect to the variations of all coordinates, velocities, and accelerations, which are coupled by the constraints. The position, velocity and acceleration level constraints are also perturbed to obtain the relationships between the variations of all relative coordinates, velocities, and accelerations and variations of the independent ones. The perturbed constraint equations are then simultaneously solved for variations of all coordinates, velocities, and accelerations only in terms of the variations of the independent coordinates, velocities, and accelerations. Finally, the relationships between the variations of all coordinates, velocities, accelerations and these of the independent ones are substituted into the variational equations of motion to obtain the linearized equations of motion only in terms of the independent coordinate, velocity, and acceleration variations.

키워드

참고문헌

  1. Sohoni, V. N., Whitesel, J., 1986, 'Automatic Linearization of Constrained Dynamical Models,' ASEM. Journal of Mechanism, Transmission, and Automation in Design, Vol. 108, pp. 300-304 https://doi.org/10.1115/1.3258730
  2. Neuman, C.P., Murray, J.J., 1984, 'Linearization and Sensitivity Functions of Dynamic Robot Models,' IEEE Transactions on Systems, Man, and Cybernetics, Vol. SMC-14, No. 6, pp. 805-818 https://doi.org/10.1109/TSMC.1984.6313309
  3. Balafoutis, C.A., Misra, P., Patel, R.V., 1986, 'Recursive Evaluation of Linearized Dynamic Robot Models,' IEEE Journal of Robotics and Automation, Vol. RA-2, No. 3, pp. 146-155
  4. Gontier, C., Li, Y., 1995, 'Lagrangian Formulation and Linearization of Multibody System Equations,' Computers & Structures, Vol. 57, No. 2, pp. 317-331 https://doi.org/10.1016/0045-7949(94)00599-X
  5. Bae, D. S., Haug, E. J., 1987, 'A Recursive Formulation for Constrained Mechanical System Dynamics: Part I, Open Loop Systems,' Mech. Struct. and Machines, Vol. 15, No. 3, pp. 359-382 https://doi.org/10.1080/08905458708905124
  6. Bae, D. S., Haug, E. J., 1987, 'A Recursive Formulation for Constrained Mechanical System Dynamics: Part II, Closed Loop Systems,' Mech. Struct. and Machines, Vol. 15, No. 4, pp. 481-506 https://doi.org/10.1080/08905458708905130
  7. Bae, D.S., Han, J.M., Yoo, H.H., 1999, 'A Generalized Recursive Formulation for Constrained Mechanical System Dynamics,' Mech. Struct. & Mach., Vol. 27(3), pp. 293-315 https://doi.org/10.1080/08905459908915700
  8. Bae, D.S., Lee, J.K., Cho, H.J., Yae, H., 2000, 'An Explicit Integration Method for Realtime Simulation of Multibody Vehicle Models,' Computer Methods in Applied Mechanics and Engineering, Vol. 187, pp. 337-350 https://doi.org/10.1016/S0045-7825(99)00138-3
  9. Bae, D.S., Han, J.M., Choi, J.H., Yang, S.M., 2001, 'A Generalized Recursive Formulation for Constrained Flexible Multibody Dynamics,' International Journal for Numerical Methods in Engineering, Vol. 50, pp. 1841-1859 https://doi.org/10.1002/nme.97
  10. Ryu, H.S., Bae, D.S., Choi, J.H., Shabana AA, 2000, 'A Compliant Track Link Model for High-speed, High-mobility Tracked Vehicles,' International Journal for Numerical Methods in Engineering, Vol. 48, pp. 1481-1502 https://doi.org/10.1002/1097-0207(20000810)48:10<1481::AID-NME959>3.0.CO;2-P
  11. Kim, H.W., Bae, D.S., Choi, K.K., 2001, 'Configuration Design Sensitivity Analysis of Dynamics for Constrained Mechanical Systems,' Computer Methods in Applied Mechanics and Engineering, Vol. 190, pp. 5271-5282 https://doi.org/10.1016/S0045-7825(00)00372-8
  12. Kim, J.I., Park, J.H., Yoo, H.H., Bae, D.S., 1999, 'Static Equilibrium and Linear Vibration Analysis of Constrained Multibody Systems,' Journal of KSME A, 23, 5, pp. 871-880
  13. Park, J.H., Yoo, H.H., Hwang, Y.H., Bae, D.S., 2000, 'Inverse Dynamics Analysis of Constranined Multibody Systems Considering Friction Forces on Kinematic Joints,' Journal of KSME A, 24, 8, pp. 2050-2058
  14. Yoo, H.H., Park, J.H., Hwang, Y.H., Bae, D.S., 1997, 'Dynamics Analysis of Constrained Multibody Systems using Kane's Method,' Journal of KSME A, 21, 12, pp. 2156-2164
  15. RecurDyn User's Manual, FBK, Seoul, Korea.
  16. Wittenburg, J., 1997, 'Dynamics of Systems of Rigid Bodies,' B. G. Teubner Stuttgart