Research on Accelerated Reliability Testing Methods Applicable to Non-Electronic Components of Flight Control Systems

Item

Title
Research on Accelerated Reliability Testing Methods Applicable to Non-Electronic Components of Flight Control Systems
Date
1965
Index Abstract
Not Available
Photo Quality
Complete
Report Number
AFFDL TR 64-181
Creator
Johnson, W. F.
Corporate Author
Curtiss-Wright Corporation
Laboratory
AF Flight Dynamics Laboratory
Extent
207
NTRL Accession Number
AD617567
Identifier
AD0617567
Access Rights
Notice(s)
Distribution Classification
1
Contract
AF 33(657)-11080
DoD Project
8225
DoD Task
822502
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Special Scanning Requirements
fold out pages
Abstract
The study is concerned with the development of techniques for the testing of electromechanical components in time compressed form. The motivating basis for this work is that presently used statistical testing methods require large numbers of samples and long testing periods to compile meaningful MTBF data. The approach employed herein included: System failure mode analysis, Classification and ranking of failure modes in terms of influence and frequency of occurrence, Physics of failure analysis at part and material levels. 'Measured weakening' (pre-cracking) technique was developed and applied to the most predominate failure parts to generate failures in reasonably short test times. In addition, extraneous or unwanted failures were not produced, which is frequently the case when 'over load' testing is employed. An all mechanical position servo unit was selected as a typical energy conversion flight control system component on which tests were conducted to verify the developed techniques for accelerating reliability testing. The tests results indicated that 'measured weakening' of mechanical parts can be employed to reduce the number of samples required and the test time involved to perform reliability testing.
Report Availability
Full text available
Date Issued
1965-03
Provenance
AFRL/VACA
Type
report
Format
1 online resource
Media
AFFDLTR64-181.pdf