By Topic

An optimized chattering free sliding mode controller to suppress torsional vibrations in drilling strings

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Fouad, T.A. ; Nat. Drilling Co. - UAE, United Arab Emirates ; Abdel-Magid, Y.L. ; Alhammadi, K. ; Karki, H.

The discontinuous control signal in a sliding mode controller causes significant problems of chattering. A smooth control signal is important if the controller is to suppress torsional vibrations in drillstrings. This is mandatory to avoid placing the expensive top-drive under loads of oscillatory torque; maintaining its integrity and minimizing maintenance costs. A chattering free sliding-mode controller optimized using a Particle Swarm Optimization (PSO) routine is proposed to avoid bit sticking phenomena and in addition, provide a smooth control signal to the top drive system. In this work, a discontinuous lumped-parameter torsional model of four degrees of freedom is considered, and the bit-rock contact is taken to be a variation of the Stribeck friction together with the dry friction model.

Published in:

GCC Conference and Exhibition (GCC), 2011 IEEE

Date of Conference:

19-22 Feb. 2011