Accession Number : ADA190298

Title :   Modeling Failures of Intermittently Used Machines.

Descriptive Note : Final rept.,

Corporate Author : CENTER FOR NAVAL ANALYSES ALEXANDRIA VA NAVAL PLANNING MANPOWER AND LOGISTICS DIV

Personal Author(s) : Follmann, Dean A

PDF Url : ADA190298

Report Date : Jul 1987

Pagination or Media Count : 37

Abstract : This research memorandum presents methodology for analyzing failures of machines that are repeatedly turned on and off. Because a machine can fail both when it is on and off, different parametric models for failure are used for each of these periods. An important issue addressed for such machines is how the intermittent use itself affects failure. Because the models can predict the chance of failure under different usage patterns, less harmful usage patterns can be recommended. As an example, the models are applied to a radar system, and both the immediate and cumulative effects of on-off cycling are demonstrated. Keywords: Regression analysis, Statistical analysis, Statistical models, Time intervals, Weibull model, Parametric analysis.

Descriptors :   *MATHEMATICAL MODELS, *ELECTRONIC SWITCHING, *FAILURE(ELECTRONICS), *RADAR EQUIPMENT, CYCLES, PARAMETRIC ANALYSIS, RADAR, REGRESSION ANALYSIS, TIME INTERVALS, WEIBULL DENSITY FUNCTIONS, CYCLES, NAVAL EQUIPMENT

Subject Categories : Operations Research
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE