Accession Number:

ADA109896

Title:

Signal Processing of Shock-Wave Overpressure Records

Descriptive Note:

Suffield memo.

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT SUFFIELDRALSTON (ALBERTA)

Personal Author(s):

• Gottlieb, James J.
• Ritzel, David V.
• Miskew, Irene A.

Report Date:

1981-08-01

Pagination or Media Count:

44.0

Abstract:

Successful methods for numerically processing overpressure-time measurements of shock and blast waves and sonic booms are presented and illustrated with sample results. These methods include the elimination of high- frequency random and other noise from the measurement by employing a fast- Fourier-transform technique and judiciously altering the high-frequency part of the Fourier spectrum the removal of low-frequency periodic fluctuations including baseline shift and drift from the record by using specially developed techniques described in the report and the extraction of information from the processed shock-wave record including shock wave arrival time, positive-phase duration and impulse, peak overpressure, rise time, and overpressure decay rate.

Descriptors:

• *SIGNAL PROCESSING
• *SHOCK WAVES
• *OVERPRESSURE
• PEAK VALUES
• HIGH FREQUENCY
• EXPERIMENTAL DATA
• CANADA
• BLAST WAVES
• RATES
• TIME
• DRIFT
• MATHEMATICAL FILTERS
• SHIFTING
• DATA REDUCTION
• FAST FOURIER TRANSFORMS
• NOISE
• ARRIVAL
• DECAY
• LOW FREQUENCY
• SONIC BOOM

Subject Categories:

• Numerical Mathematics
• Armor

Distribution Statement:

APPROVED FOR PUBLIC RELEASE