SiGe Direct Digital Synthesizer (DDS) System

The objective of this proposal is to demonstrate the benefits of a computer controlled active damper suspension system based on a magnetorheological (MR) fluid controllable damper for off-road ground vehicles and that Rod Millen Special Vehicles (RMSV) hasthe expertise, equipment and facilities to develop an active MR fluid damper based suspension system for the HMMWV and other ground vehicles in a timely, cost effective manner.Computer controlled suspension systems using active MR fluid damper actuators offer three methods for improved suspension performance: The ability to respond to a greater number of critical vehicle variables; The damper force - velocity constitutiverelations are not solely based on purely mechanical elements as with a passive suspension, but can be controlled at high frequencies to meet suspension controller demands; The vehicle suspension system can continually be optimized for the specific vehicleload and operating conditions, such as best driver isolation for reduced fatigue, or best tire traction for emergency handling.