Accession Number : AD0828323

Title :   RESEARCH AND INVESTIGATION OF ANALYTICAL TECHNIQUES FOR PREDICTING RELIABILITY OF FLIGHT CONTROL SYSTEMS AND COMPONENTS.

Descriptive Note : Technical documentary rept. 15 Apr 65-1 Sep 67,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS

Personal Author(s) : Baum, J. V. ; Conlon, R. J. ; Kopp, C. G. ; Wertz, J. B.

Report Date : JAN 1968

Pagination or Media Count : 181

Abstract : Previous reliability research efforts by Battelle developed an analytical technique called the Moment method for predicting drift-type failures of components and systems, and applied this technique to a number of components and subsystems. This report presents an extension of the Moment method which permits it to handle systems whose performance characteristics are related to part parameters by non-linear transfer functions, and whose part parameters have non-normal distributions. Bellows seals for a liquid-metal servoactuating subsystem were analyzed and their fatigue life was estimated. Portions of a servovalve for the same subsystem were simulated physically and subjected to operation at elevated temperature and pressure to establish wear data for possible future use in a Moment method analysis. Six rate gyros were tested and modeled, and the Moment method applied to the results. Critical parameters affecting gyro sensitivity and damping factor were established. (Author)

Descriptors :   (*FLIGHT CONTROL SYSTEMS, RELIABILITY), MATHEMATICAL PREDICTION, MOMENTS, MATHEMATICAL MODELS, PERFORMANCE(ENGINEERING), ANALYSIS OF VARIANCE, LIQUID METALS, VALVES, GYROSCOPES, DRIFT, HYDRAULIC EQUIPMENT, SERVOMECHANISMS, ACTUATORS.

Subject Categories : Flight Control and Instrumentation
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE