engineering

Advanced Vehicle Systems engineering group provides support for military and commercial vehicle systems integration and design. Our focus is to ensure fielded systems meet all required U.S. DoD military specifications and are tailored in such a way as to fit the ultimate users ideals. Over the years we have gained a reputation as a company that listens and acts. Or to put it in Marine Corps speak: ‘AVS is a company that leans forward!

Rather than generating a website that continually repeats capability statements, we would like to show you a couple of things that we’ve done. Things that have been fielded and our customers have promoted to their peers.

To go from an ‘off-the-shelf’ product to a fully integrated weapons platform as that of the Marine Corps' Interim Fast Attack Vehicle (IFAV) takes time and a great deal of innovation.

Internal and external helicopter transportation, deep water fording, equipment stowage plans, weapons interfaces, night vision, communications, best crew ergonomics, reliability, and safety. All have their place in the final system configuration.

Transportability Systems
Through analysis, evaluation, and consultation AVS designs systems that meet specifications and that can be both fielded and supported. One such case is illustrated below in which AVS re-designed a complete front bumper system and the method of attachment to the vehicle frame. The AVS design achieved full compliance with Mil-Std-209J for transportability and met all requirements for full frontal vehicle protection, a method for quick winch attachment and removal, rapid recovery points, helicopter lift rings, HMMWV recovery interfaces, safe high-lift jacking points, and was of minimal weight.

Case Study
On initial fielding the IFAV was integrated with an excellent heavy weapons pedestal from a company renowned for its designs and products used predominantly in the boat and ship world. However, as can be seen in the picture to the right, the system had problems when firing transverse to the vehicle. Due to the narrow confines of the vehicle the gunner was hanging over the side, especially when firing the M2 50Cal Heavy Machine Gun.

AVS needed to identify a method whereby the operator could be moved back into the vehicle without adding additional structure such as a turret configuration that would conflict with the vehicles’ ability to be flown internal to the MH 53E helicopter. Following several iterations the design result was the AVS ‘Offset’ system. Essentially the Offset is an arm that moved the weapon away from the centerline of the pedestal by approximately 14 inches while maintaining good elevation, T&E interface, was removable for internal flight, relatively light-weight, and most importantly, was safe. Moving the weapon away from the centerline by 14 inches isn’t as easy as it sounds; after all the 50Cal has a recoil of over 1000 lbs. To achieve the correct geometry, materials, and fabrication methods, the final design followed an iterative development cycle using state-of-the-art 3d CAD (Solidworks®)and Finite Element Analysis software (COSMOS® & COSMOS/M®). Structural analysis assessed both linear and non-linear load paths throughout the final assembled system. Prototypes were then tested by Crane Naval Surface Warfare Center simulating over 150,000 firing cycles. The final design was so successful that the ’Offset' system was integrated across the IFAV fleet and on HMMWVs and other heavy vehicles via custom-made interface plates. Adapters were also designed for interface to both M240G and M249 Light Machine Guns.

 
Engineering Models
AVS represented the Automotive-Technik 'Pinzgauer' family of military vehicles for the United States. As a part of the engineering function accurate models were necessary to provide a platform from which various integrated applications could be quickly assessed without the need to generate mockups or expensive prototypes. AVS developed these models in Solidworks® so they could be configured in any desirable manner to carry out preliminary design and feasibility studies. In addition to being visually representative, these models were used to provide accurate FEA models, volume displacement, mass, centers of gravity, potential interferences, design drawings, etc. These models also provided excellent graphics that supplemented technical manuals and support documentation. In addition to having the vehicles modeled, all ancillary equipment models are also available to us from our in-house equipment libraries. Modeled equipment includes all of our weapon systems, trailers, radio systems, various ammunition storage containers, water and fuel can racks, and various jacks, compressors, and special tools.
 
Advanced Vehicle Systems engineering group has gained extensive experience in the design and integration of equipment to be transported both internally and externally by helicopter. To achieve the best designs we have generated accurate computer models of both the MH 53E and V22 Osprey to ensure optimum tie-down patterns, CG placement, and associated stress analysis.