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Proceedings Paper

Impact detection and analysis/health monitoring system for composites
Author(s): James E. Child; Amrita Kumar; Shawn Beard; Peter Qing; Don G. Paslay
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Paper Abstract

This manuscript includes information from test evaluations and development of a smart event detection system for use in monitoring composite rocket motor cases for damaging impacts. The primary purpose of the system as a sentry for case impact event logging is accomplished through; implementation of a passive network of miniaturized piezoelectric sensors, logger with pre-determined force threshold levels, and analysis software. Empirical approaches to structural characterizations and network calibrations along with implementation techniques were successfully evaluated, testing was performed on both unloaded (less propellants) as well as loaded rocket motors with the cylindrical areas being of primary focus. The logged test impact data with known physical network parameters provided for impact location as well as force determination, typically within 3 inches of actual impact location using a 4 foot network grid and force accuracy within 25%of an actual impact force. The simplistic empirical characterization approach along with the robust / flexible sensor grids and battery operated portable logger show promise of a system that can increase confidence in composite integrity for both new assets progressing through manufacturing processes as well as existing assets that may be in storage or transportation.

Paper Details

Date Published: 10 May 2006
PDF: 8 pages
Proc. SPIE 6222, Sensors for Propulsion Measurement Applications, 62220G (10 May 2006); doi: 10.1117/12.669525
Show Author Affiliations
James E. Child, ATK Thiokol Inc. (United States)
Amrita Kumar, Acellent Technologies Inc. (United States)
Shawn Beard, Acellent Technologies Inc. (United States)
Peter Qing, Acellent Technologies Inc. (United States)
Don G. Paslay, ATK Thiokol Inc. (United States)

Published in SPIE Proceedings Vol. 6222:
Sensors for Propulsion Measurement Applications
Valentin Korman, Editor(s)

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