Parameter estimation to improve accuracy of mechanical system simulations using rigid body codes
✍ Scribed by Seong sik Jo; David Beale
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 589 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0045-7949
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✦ Synopsis
A procedure is proposed to improve the accuracy of responses obtained from rigid body codes used to simulate mechanisms, or spring loaded mechanisms that act like structures. In the method, dynamic parameters of a constrained planar mechanical system were estimated from the independent kinematic responses and measured external forces of the system. The Lagrange equation was used to develop the equations of motion of the system and the linear equations with respect to the dynamic parameters being estimated. The generalized coordinate partitioning technique using the Lagrange multiplier and constraint equations of the system was applied to reduce the dimension of the constrained dynamic system. The rank deficient linear system was solved by SVD (singular value decomposition). ADAMS simultions for three different models revealed good correlation between the actual and the estimated parameters, by comparison between the simulated system response from the actual parameters and from the estimated parameters.