Semi-Active Damped Seating Technology for the EFV

Award Information
Agency: Department of Defense
Branch: Navy
Contract: M67854-08-C-0015
Agency Tracking Number: N062-103-0314
Amount: $764,990.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2006
Solicitation Topic Code: N06-103
Solicitation Number: 2006.2
Small Business Information
11750 Beltsville Drive, 3rd Floor, Beltsville, MD, -
DUNS: 061997029
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Gregory Hiemenz
 Principal Investigator
 (240) 790-0598
Business Contact
 Amy Hizoune
Title: V. P. Finance
Phone: (240) 790-0609
Research Institution
The Expeditionary Fighting Vehicle (EFV) is an amphibious vehicle designed to operate through harsh conditions and at much higher speeds than its predecessors. These capabilities and broadly vary operational conditions lead to a complex design and human factors scenario for the forward seating positions that cannot be solved using a passive seat suspension. Injurious shock loads transmitted to the occupants when traversing over water in high sea states as well as harmful shock and vibration transmitted to the occupants when the vehicle is traveling over land pose a threat to occupant health and significantly limit mission length. To address this, a retrofit-capable Semi-Active Magnetorheological Vehicle Seat (SAMVS) system was developed in Phase I which adapts to these broadly varying operational conditions as well as occupant weight to provide optimal protection of the occupant during EFV missions. The key technologies behind the SAMVS system is a retrofit-capable magnetorheological (MR) damper that can be electronically controlled by compact control electronics featuring a control algorithm developed specifically for this application. With these technologies, the SAMVS system enables a unique single solution for all shock and vibration environments encountered by the EFV. It has been shown that the SAMVS system can reduce the shock dosages applied to the occupant by 33% in water mode and reduce the vibration transmitted to the occupant by 65% as compared to the current passive suspension system. Further performance gains are expected in Phase II as a tactical prototype system is fabricated, tested, and refined.

* information listed above is at the time of submission.

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