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This paper presents a brief overview of the Common Launch Acceptability Region Approach (CLARA) problem and the history of efforts within the Air Force and SAE to address it. An SAE Task Group has produced top level requirements and a proposed CLAR Methodology consisting of three components (Truth Model, Coefficient Generator and LAR Generator) that provides a solution to the multiple LAR implementation problem. This proposed CLAR methodology fulfills the key requirement of a LAR algorithm that is to be common to all applications and allows updates via tables of coefficients requiring the validation of only those coefficients and not the algorithm. This paper also presents the status of trade studies being conducted by the CLARA TG on mathematical algorithms required to implement the methodology. A key step in these trade studies is development of the appropriate metrics and analysis tools with which to judge alternative algorithms.

The objective of this study was to optimize the occupant restraint systems for a light tactical vehicle in frontal crashes. A combination of sled testing and computational modeling were performed to find the optimal seatbelt and airbag designs for protecting occupants represented by three size of ATDs and two military gear configurations. This study started with 20 sled frontal crash tests to setup the baseline performance of existing seatbelts, which have been presented previously; followed by parametric computational simulations to find the best combinations of seatbelt and airbag designs for different sizes of ATDs and military gear configurations involving both driver and passengers. Then 12 sled tests were conducted with the simulation-recommended restraint designs. The test results were further used to validate the models. Another series of computational simulations and 4 sled tests were performed to fine-tune the optimal restraint design solutions.

Low-frequency range extension of loudspeakers by alignments which include passive electrical components was first studied by Benson and more recently by Von Recklinghausen. The present work uses a computer model to test the practicality of representative designs. A third-order alignment is found to have considerable merit. Measurements of real systems are presented.