A framework to enable rotorcraft maintenance free operating periods

dc.contributor.advisor Schrage, Daniel P.
dc.contributor.author Bellocchio, Andrew T.
dc.contributor.committeeMember Mavris, Dimitri
dc.contributor.committeeMember Volovoi, Vitali
dc.contributor.committeeMember Melnyk, Richard V.
dc.contributor.committeeMember Ashok, Sylvester
dc.contributor.department Aerospace Engineering
dc.date.accessioned 2018-05-31T18:15:56Z
dc.date.available 2018-05-31T18:15:56Z
dc.date.created 2018-05
dc.date.issued 2018-04-05
dc.date.submitted May 2018
dc.date.updated 2018-05-31T18:15:57Z
dc.description.abstract The British Ultra-Reliable Aircraft Pilot Program of the late 1990s introduced the sustainment concept of a Maintenance Free Operating Period (MFOP) where aircraft become fault tolerant, highly reliable systems that minimizes disruptive failures and maintenance for an extended period of operations. After the MFOP, a single Maintenance Recovery Period (MRP) consolidates repair of accrued faults and inspections to restore an aircraft’s reliability for the next MFOP cycle. The U.S. Department of Defense recently adopted MFOP as a maintenance strategy for the next generation of rotorcraft named Future Vertical Lift. The U.S. military desires the assurance of uninterrupted flight operations that an MFOP strategy provides to enable an expeditionary force. This work develops a framework to balance downtime, dependability, and maintainability of an MFOP rotorcraft. It begins with the hypothesis that metrics using the mean are insufficient in a MFOP strategy and that metrics that include the time history of failure are as important as the rate of failure. It will utilize a Discrete Event Simulation to model the MFOP, MRP, and the success rate as operational metrics. The work will identify which subsystem(s) limit the MFOP of an aircraft and which components drive MRP higher. It will explore a framework to build policies for availability and success rate where preventive component renewals occur at discrete multiples of the MFOP. Finally, it will test the hypothesis that an operator has some control over the MFOP to meet changing operational demands by adapting the MRP through an aggressive lifing policy.
dc.description.degree Ph.D.
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/59909
dc.language.iso en_US
dc.publisher Georgia Institute of Technology
dc.subject Maintenance free operating period
dc.subject MFOP
dc.subject Maintenance recovery period
dc.subject MRP
dc.subject Preventive maintenance
dc.subject Rotorcraft
dc.subject Maintenance policy
dc.subject Discrete event simulation
dc.subject Failure cause identification
dc.subject Adaptable maintenance
dc.subject Maintenance free operating period success
dc.subject MFOPS
dc.subject Reliability
dc.subject Dependability
dc.subject Availability
dc.subject Renewal theory
dc.title A framework to enable rotorcraft maintenance free operating periods
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename College of Engineering
local.contributor.corporatename Daniel Guggenheim School of Aerospace Engineering
local.relation.ispartofseries Doctor of Philosophy with a Major in Aerospace Engineering
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
relation.isOrgUnitOfPublication a348b767-ea7e-4789-af1f-1f1d5925fb65
relation.isSeriesOfPublication f6a932db-1cde-43b5-bcab-bf573da55ed6
thesis.degree.level Doctoral
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