Method and system for evaluating gas generants and gas generator

Details Method and system for evaluating gas generants and gas generator Method and system for evaluating gas generants and gas generator

1994-01-10

1995-09-19

Teska, Kevin J.

Boots, shoes, and leggings

36455101, 364578, 374 38, 7386104, G01N 2522

Patent

active

054522102

ABSTRACT:
A computer-implemented system and method for evaluating gas bag inflator designs are disclosed, including an inflator state machine having slots for signals corresponding to predetermined gas dynamic and heat transfer characteristics of a gas bag inflator at a specified time. Inflator state machines having one or more chambers, and zero or more deflectors, screen packs, burst disks, and vents are supported. Initial temperatures, pressures, and chamber gas contents may be specified, as may the geometry and other characteristics of gas generant pills. A controller in the state machine accesses a chemical database to obtain information about enthalpy, viscosity, and other properties of gas generant combustion products, igniter combustion products, and other compounds present within the gas bag inflator. Running the state machine produces predictions of pressure and temperature behavior within a fabricated gas bag inflator, permits elimination of gas bag inflator designs that are unlikely to meet predetermined performance goals, and provides explanations for unexpected test results of fabricated inflators.

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patent: 5203205 (1993-04-01), Ookubo et al.
Steven et al., "Computer Simulation of the Pyrotechnic Inflator for Auto Inflatable Restraint Systems", Thiokol Corp, Oct. 1980-Apr. 1982 (report).

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