Highly Reclined Seat (HRS) CAD Accommodation Model Verification Plan 28Apr2022v1.0 DIST A

Highly Reclined Seat (HRS) CAD Accommodation Model Verification Plan 28Apr2022v1.0 DIST A

Report No.

OPSEC6457

Authors

Gale Zielinski, Frank Huston II

Date/Pages

April 2022; 24 pages

Abstract

Military ground vehicles are currently designed using requirements from MIL-STD-1472, the Department of Defense Design Criteria Standard Human Engineering.   The MIL-STD, however, is difficult for designers to apply properly because it is often open to interpretation.  Easy-to-use Computer-Aided Design (CAD) tools, such as accommodation models, are needed by the ground vehicle community to address this issue.  The fifth in a series of accommodation models being created is the Highly Reclined Seat (HRS) accommodation model.  Verification is intended to build confidence in the HRS CAD model for use in ground vehicle design.  The model described in this verification report is the Ground Vehicle Systems Center (GVSC) HRS CAD model.  This model is being developed to address the need of certain vehicles to have a reduced vehicle profile, requiring the crew to sit in a more reclined position, and where the crew performs most of the tasks fully under-armor.  The model provides the composite boundaries representing the body of the defined user population, including the effects of body size, protective equipment and gear.  The accommodation boundaries indicate the adjustment range needed for vehicle controls and the resulting positions for the equipped Soldier population’s eyes, helmet, torso, elbows, knees, and boots. Clearances between the user and surrounding interior vehicle surfaces have been added per MIL-STD-1472. Crew field of view to displays is developed using a combination of MIL-STD-1472 and SAE Recommended Practice J1050 applied to the eyellipse.

Distribution

DISTRIBUTION A. Approved for public release; distribution unlimited. OPSEC6457

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