Impact detection and analysis/health monitoring system for composites

James E. Child; Amrita Kumar; Shawn Beard; Peter Qing; Don G. Paslay

doi:10.1117/12.669525

10 May 2006 Impact detection and analysis/health monitoring system for composites

James E. Child, Amrita Kumar, Shawn Beard, Peter Qing, Don G. Paslay

Proceedings Volume 6222, Sensors for Propulsion Measurement Applications; 62220G (2006) https://doi.org/10.1117/12.669525
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

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.

Citation Download Citation

James E. Child, Amrita Kumar, Shawn Beard, Peter Qing, and Don G. Paslay "Impact detection and analysis/health monitoring system for composites", Proc. SPIE 6222, Sensors for Propulsion Measurement Applications, 62220G (10 May 2006); https://doi.org/10.1117/12.669525

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