Accession Number : ADA195582

Title :   Feasibility Study on Determining the Effect of Testing on Harpoon Missile System Reliability.

Descriptive Note : Final rept. 29 Mar 83-31 Jul 85,

Corporate Author : NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX

Personal Author(s) : Labra, John J ; Oelkers, Edgar

PDF Url : ADA195582

Report Date : Jun 1985

Pagination or Media Count : 95

Abstract : The effect of testing on the Harpoon Missile System reliability can be determined by the data retrieval and analyses described in this feasibility study. Emphasis is placed on five missile subassemblies including the guidance section, the guidance section's seeker, altimeter, and midcourse guidance unit, and the midcourse unit's attitude reference assembly, and digital computer/power supply. Extraneous effects on reliability including the several design and environment categories and the multiple types of testing performed on the missile subassemblies can be controlled or measured. A data retrieval plan prepared in cooperation with McDonnell-Douglas Astronautics Company would provide the data needed for the analysis. Statistical analysis methodology to estimate time-between-failure distributions and distribution parameters, and regression analysis with associated ANOVA can be used to relate the subassemblies' reliability characteristics to the cumulative item age, power on-off cycles, and power-on time. Subject to assumption of multicollinearity on the order of 70% to 90% correlation among these variables, changes in MTBF on the order of 30% to 50% could be detected in a pilot analysis program employing a population of 500 item histories. Such a pilot program would determine the degree of multicollinearity, and would provide reliability estimates for the missile subassemblies with much tighter error bars than those normally employed. (FR)

Descriptors :   *SURFACE TO SURFACE MISSILES, *ANTISHIP MISSILES, *LABORATORY TESTS, ALTIMETERS, CYCLES, DIGITAL COMPUTERS, DISTRIBUTION, ERRORS, ESTIMATES, FEASIBILITY STUDIES, GUIDANCE, GUIDED MISSILES, HOMING DEVICES, INFORMATION RETRIEVAL, METHODOLOGY, MIDCOURSE GUIDANCE, PARAMETERS, PILOT STUDIES, PLANNING, POPULATION, POWER, POWER SUPPLIES, REGRESSION ANALYSIS, RELIABILITY, RODS, STATISTICAL ANALYSIS

Subject Categories : Guided Missiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE