Identification of parameters in the torsional dynamics of a drilling process through Bayesian statistics

Abstract : This work presents the estimation of the parameters of an experimental setup, which is modeled as a system with three degrees of freedom, composed by a shaft, two rotors, and a DC motor, that emulates a drilling process. A Bayesian technique is used in the estimation process, to take into account the uncertainties and variabilities intrinsic to the measurement taken, which are modeled as a noise of Gaussian nature. With this procedure it is expected to check the reliability of the nominal values of the physical parameters of the test rig. An estimation process assuming that nine parameters of the experimental apparatus are unknown is conducted, and the results show that for some quantities the relative deviation with respect to the nominal values is very high. This deviation evidentiates a strong deficiency in the mathematical model used to describe the dynamic behavior of the experimental apparatus.
Liste complète des métadonnées

Cited literature [6 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01446444
Contributor : Americo Cunha Jr <>
Submitted on : Thursday, January 26, 2017 - 3:00:53 AM
Last modification on : Saturday, November 11, 2017 - 10:51:55 PM
Document(s) archivé(s) le : Thursday, April 27, 2017 - 2:26:32 PM

File

paper_mc_2013_v32_pp763-773.pd...
Publisher files allowed on an open archive

Licence


Copyright

Identifiers

  • HAL Id : hal-01446444, version 1

Collections

Citation

Mario Sandoval, Americo Cunha Jr, Rubens Sampaio. Identification of parameters in the torsional dynamics of a drilling process through Bayesian statistics. Mecánica Computacional, OJS editorial, 2013, pp.763 - 773. ⟨hal-01446444⟩

Share

Metrics

Record views

120

Files downloads

59