Presented at the 42nd Annual Meeting of the Fuze Section, National Defense Industrial Association, San Diego, CA, April 1998.

Simultaneous All-Fire and No-Fire Determination of Multi Detonator Systems

Barry T. Neyer Brad Hanna
  R Scott Such
EG&G Optoelectronics NSWC Dahlgren Division
Miamisburg, OH 45343-0529 Dahlgren, VA 224485100

Contact Address
Barry T. Neyer
PerkinElmer Optoelectronics
1100 Vanguard Blvd
Miamisburg, OH 45342
(937) 865-5586
(937) 865-5170 (Fax)
Barry.Neyer@PerkinElmer.com

Abstract

A number of fuze systems have multiple independent detonators. Most often, all of these are required to detonate if the system is to function properly. However, the detonation of any one or more of the detonators is usually sufficient to cause an unsafe event. Thus, the criteria used for a success in all-fire experiments is that all detonators functioned, while the criteria used for no-fire tests is that no detonators functioned. For Exploding Foil Initiators, both all-fire and no-fire tests are conducted using the same test conditions. The only difference is in how the data are interpreted, both in computing the next test level, and in computing the all-fire and no-fire levels.

Instead of conducting two independent tests, it is more efficient to conduct a joint test. The test level picking algorithm can then use information from both sets of data to pick the test levels more efficiently. This paper will present the theoretical analysis, simulation results, and test data from a multi detonator system.

However, an even larger increase in efficiency is obtained if the detonators are truly independent. In this case the most efficient test design is to record the number of fires and fails for each system tested. The paper shows the increase in test efficiency by treating the detonators independently.

Technical Papers of Dr. Barry T. Neyer