Masters Theses
Abstract
"Deviation in the shape of a torque-angle signature can be an indication of a fault in a bolted assembly. The object of this thesis is to develop a methodology that can analyze the torque-angle signature generated after using a sensor-embedded rotary tool, where the torque-angle data is transferred to a computer, and determine in real-time if the assembly process has been successful or not. The methodology relies on the torque and angle values of the four transition points between the four zones on the torque-angle signature. The experiments conducted on ideally "perfect" assemblies show considerable variation on the angle component of transition points, while variation on torque is relatively small for such ideal cases. Based on the data obtained on these fault-free assemblies, a zone of confidence (ZOC) is established around each transition point. The experiments that were conducted on assemblies with faults show that their transition points fall outside the ZOC values determined a priori. Nevertheless, due to considerable variation even on fault-free assemblies, the methodology is not 100% accurate.
The study shows that the proposed methodology has merits in detecting faults in bolted assemblies if (1) variation in the torque-angle signature due to the tools and the sensors, and (2) variation due to manually running down the nut on the fastener are minimized, if cannot be avoided"-- Abstract, p. iii
Advisor(s)
Saygin, Can
Committee Member(s)
Grasman, Scott E. (Scott Erwin)
Sarangapani, Jagannathan, 1965-
Department(s)
Engineering Management and Systems Engineering
Degree Name
M.S. in Engineering Management
Publisher
University of Missouri--Rolla
Publication Date
Fall 2006
Pagination
x, 69 pages
Note about bibliography
Includes bibliographical references (pages 66-69)
Rights
© 2006 Thomas H. Sarantakos, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Bolted jointsFault location (Engineering)Real-time controlTorque
Thesis Number
T 9098
Print OCLC #
124064527
Recommended Citation
Sarantakos, Thomas H., "Real-time Fault Detection in Bolted Assemblies using Torque-angle Signatures" (2006). Masters Theses. 5889.
https://scholarsmine.mst.edu/masters_theses/5889
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