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Electro-hydrodynamic pumped hydraulic actuation with application to active vibration control

A new type of actuation device has been conceptualized that meets the needs of both large displacement, force and bandwidth within a package more compact than currently available magnetostrictive and stack-type piezoelectric actuators of similar rating. This concept relies on micro- scale electrohydrodynamic (EHD) pumping of a dielectric liquid within small channels. Configured as an actuator, the EHD pump(s) would be used to move fluid between two reservoirs - each having a compliant membrane that interfaces to the world to provide the means to achieve vibration cancellation or micro actuation.