### Abstract

This papers presents a systematic method for deriving the minimum number of equations of motion for multibody system containing closed kinematic loops. A set of joint or natural coordinates is used to describe the configuration of the system. The constraint equations associated with the closed kinematic loops are found systematically in terms of the joint coordinates. These constraints and their corresponding elements are constructed from known block matrices representing different kinematic joints. The Jacobian matrix associated with these constraints is further used to find a velocity transformation matrix. The equations of motions are initially written in terms of the dependent joint coordinates using the Lagrange multiplier technique. Then the velocity transformation matrix is used to derive a minimum number of equations of motion in terms of a set of independent joint coordinates. An illustrative example and numerical results are presented, and the advantages and disadvantages of the method are discussed.

Original language | English (US) |
---|---|

Pages (from-to) | 143-149 |

Number of pages | 7 |

Journal | Journal of Mechanical Design - Transactions of the ASME |

Volume | 115 |

Issue number | 1 |

State | Published - Mar 1993 |

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### ASJC Scopus subject areas

- Engineering(all)

### Cite this

**Systematic construction of the equations of motion for multibody systems containing closed kinematic loops.** / Nikravesh, Parviz E; Gim, Gwanghun.

Research output: Contribution to journal › Article

*Journal of Mechanical Design - Transactions of the ASME*, vol. 115, no. 1, pp. 143-149.

}

TY - JOUR

T1 - Systematic construction of the equations of motion for multibody systems containing closed kinematic loops

AU - Nikravesh, Parviz E

AU - Gim, Gwanghun

PY - 1993/3

Y1 - 1993/3

N2 - This papers presents a systematic method for deriving the minimum number of equations of motion for multibody system containing closed kinematic loops. A set of joint or natural coordinates is used to describe the configuration of the system. The constraint equations associated with the closed kinematic loops are found systematically in terms of the joint coordinates. These constraints and their corresponding elements are constructed from known block matrices representing different kinematic joints. The Jacobian matrix associated with these constraints is further used to find a velocity transformation matrix. The equations of motions are initially written in terms of the dependent joint coordinates using the Lagrange multiplier technique. Then the velocity transformation matrix is used to derive a minimum number of equations of motion in terms of a set of independent joint coordinates. An illustrative example and numerical results are presented, and the advantages and disadvantages of the method are discussed.

AB - This papers presents a systematic method for deriving the minimum number of equations of motion for multibody system containing closed kinematic loops. A set of joint or natural coordinates is used to describe the configuration of the system. The constraint equations associated with the closed kinematic loops are found systematically in terms of the joint coordinates. These constraints and their corresponding elements are constructed from known block matrices representing different kinematic joints. The Jacobian matrix associated with these constraints is further used to find a velocity transformation matrix. The equations of motions are initially written in terms of the dependent joint coordinates using the Lagrange multiplier technique. Then the velocity transformation matrix is used to derive a minimum number of equations of motion in terms of a set of independent joint coordinates. An illustrative example and numerical results are presented, and the advantages and disadvantages of the method are discussed.

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UR - http://www.scopus.com/inward/citedby.url?scp=0027560417&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0027560417

VL - 115

SP - 143

EP - 149

JO - Journal of Mechanical Design - Transactions of the ASME

JF - Journal of Mechanical Design - Transactions of the ASME

SN - 0738-0666

IS - 1

ER -