rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: A
    title: new helicopter transmission model for condition-based maintenance technologies using first principles
  name:
    name part: Stringer, David B. (David Blake)
    name part: 1971-
    role:
      role term: creator
  name:
    name part: Sheth, Pradip N.
  name:
    name part: Allaire, Paul E.
  name:
    name part: U.S. Army Research Laboratory
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: ohu
    date issued: 2009
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource (vi, 22p.) : color illustrations
  abstract: This report presents a new helicopter transmission model in support of condition-based maintenance (CBM) initiatives. The model uses the first principles approach to analyze the rotating shafts and gear couplings using rotor dynamic analysis techniques. The helicopter transmission is presented, followed by a discussion of the finite element formulation to include gear mesh modeling methodologies. System natural frequencies and mode shapes are discussed, along with the model's validation procedure. The model's primary purpose is to simulate multiple operating conditions to include faults. One such fault condition simulates the wear of gear tooth contact surfaces. The nature of the fault and its modeling techniques are discussed. Simulation results are presented in the time domain using a conventional vibration diagnostic parameter. A new diagnostic parameter, the FE2, is also introduced for detecting faults in the frequency domain. Additional considerations and further research points are also discussed. The results demonstrate the potential of physics-based, mathematical models in providing a key technology enabler for improving health monitoring and prediction capabilities of CBM strategies.
  note: by David B. Stringer, Pradip N. Sheth, and Paul E. Allaire.
  note: Title from title screen (viewed on Nov. 30, 2009).
  note: "September 2009."
  note: Technical rept.
  note: Electronic resource.
  note: APPROVED FOR PUBLIC RELEASE.
  note: Includes bibliographical references.
  subject:
    geographic code: n-us---
  subject:
    topic: Military helicopters
    topic: Maintenance and repair
  subject:
    topic: Helicopters
    topic: Transmission devices
    topic: Maintenance and repair
  subject:
    topic: Helicopters
  subject:
    topic: Terminal flight facilities
  subject:
    topic: Machinery and tools
  subject:
    topic: Shafts(machine elements)
  subject:
    topic: Transmissions(mechanical)
  subject:
    topic: Mathematical models
  subject:
    topic: Aircraft maintenance
  subject:
    topic: Frequency domain
  subject:
    topic: Silicon carbides
  subject:
    topic: Gear teeth
  subject:
    topic: Aircraft models
  subject:
    topic: Finite element analysis
  subject:
    topic: Vibration
  subject:
    topic: Methodology
  subject:
    topic: Helicopters
  subject:
    topic: CBM(CONDITION BASED MAINTENANCE)
  classification: D 101.133:4984
  related item:
    title info:
      title: ARL-TR (Aberdeen Proving Ground, Md.) ; 4984
  identifier: http://handle.dtic.mil/100.2/ADA507637
  identifier: https://purl.fdlp.gov/GPO/LPS118725
  access condition: APPROVED FOR PUBLIC RELEASE.
  record info:
    record content source: DTICE
    record creation date: 091130
    record change date: 20220105185314.0
    record identifier: in00002590592