Title page for ETD etd-07212009-040313


Type of Document Master's Thesis
Author Houzouris, Adrienne
URN etd-07212009-040313
Title The availability of multifunctional systems with multistate components
Degree Master of Science
Department Industrial and Systems Engineering
Advisory Committee
Advisor Name Title
Nachlas, Joel A. Committee Chair
Terrell, George R. Committee Member
Woldstad, Jeffrey C. Committee Member
Keywords
  • Systems engineering
Date of Defense 1993-05-05
Availability restricted
Abstract
Reliability and availability measures are well defined for simple systems, but many real systems are not simple. Many systems are designed to perform more than one task. In addition, these systems may be performing at one of many levels. When these factors are not considered, the system availability analysis changes considerably.

Many modern systems are designed to perform more than one function. Sols (1992) and Sols and Nachlas (1993) discuss the importance of multifunctional systems and the need to redefine availability to accommodate them. Furthermore, in most traditional reliability theory, components are assumed to be either functioning or failed which oversimplifies many physical situations. Multistate models have been developed in the literature, and conditions for the system structure function have been defined.

Multifunctional systems and systems with multistate components have been discussed in the literature individually, however a model for systems with both multifunctional capability and potentially degraded components has not been discussed. By synthesizing the previous work on multistate systems and on multifunctional systems, this research presents a general model for multifunctional, multistate systems. The model is specialized to a general class of multifunctional, multistate systems. Expressions are derived for the element, function, and system availability. The availability for an example system is then computed.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[VT] LD5655.V855_1993.H689.pdf 3.04 Mb 00:14:03 00:07:14 00:06:19 00:03:09 00:00:16
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.