Instrumenting an Explosive Test Arena
Abstract
Three areas of explosive testing are investigated in this thesis. First, a model of the blast wave is described and a minimum range-bandwidth product is calculated for several percentages of peak overpressure. This product is based on a single-pole, low-pass filter whose cutoff frequency turns out to be a constant divided by the positive impulse duration of the ideal blast wave. The second topic of the thesis covers three ways of removing the noise from the blast waves. One of these methods is to use analog notch filters on the data to remove the frequencies that produce the noise. These notch filters take a considerable amount of time to set-up. Therefore, a digital filter was designed to remove any frequency component whose amplitude is greater than the corresponding frequency component of a comparable ideal blast wave. The third section outlines specifications for a digital telemetry system. This system consists of a Central Control Unit (CCU) and many Field Units (FU). The CCU will control the test from detonation to the final collection of data. The FUs (up to 1000) are to be based on a microprocessor and each FU will handle up to eight transducers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1982
- Accession Number
- ADA119062
Entities
People
- Theodore J. Moody
Organizations
- Air Force Institute of Technology