NDLI: ℒ1 adaptive controller for a rotary steerable system

Content Provider	IEEE Xplore Digital Library
Author	Hui Sun Zhiyuan Li Hovakimyan, N. Basar, T. Downton, G.
Copyright Year	2011
Description	Author affiliation: Department of Electrical & Computer Engineering, University of Illinois at Urbana-Champaign, 61801, USA (Hui Sun; Basar, T.) \|\| Department of Mechanical Science & Engineering, University of Illinois at Urbana-Champaign, 61801, USA (Zhiyuan Li; Hovakimyan, N.) \|\| Schlumberger, Gloucester, GL10 3SX, United Kingdom (Downton, G.)
Abstract	The downhole directional steering system captures mechanical connections and interactions between different parts. Due to the spatial delays, parametric uncertainties and modeling inaccuracies in the system, the closed-loop stability and robust performance are challenging problems to address. Towards this goal, the current paper presents an ℒ1 adaptive controller which drives the output of the system, i.e. the borehole propagation angle, according to the operator's commands in the presence of uncertainties and disturbances. Specifically, the paper considers the Explicit Force, Finitely Sharp, Zero Mass (EFFSZM) model with spatial delays in the state. The closed-loop system response is shown to have uniform transient performance bounds with respect to a bounded reference system. The performance bounds can be improved by increasing the adaptation rate. The predictable response to the commands is demonstrated in simulations.
Starting Page	1020
Ending Page	1025
File Size	407883
Page Count	6
File Format	PDF
ISBN	9781457711046
ISSN	21589879
e-ISBN	9781457711039
DOI	10.1109/ISIC.2011.6045424
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Force Actuators Adaptive systems Delay Adaptation models Transfer functions
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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