High bandwidth, large stroke actuator

摘要: A hybrid actuator includes strain actuated elements that displace fluid to move a piston, with the forming housing, and being oriented optimize force, stroke or bandwidth. In one preferred embodiment are cylinders enclosing fluid, radial axial components of strain-induced dimensional change adding together enhance displacement. another embodiment, piezo bender produce large stroke, high bandwidth movements. Strokes up fifty percent length, bandwidths above 500 Hz achieved in light weight electrically devices free external piping hydraulics. The is readily integrated into gate valve, sub-woofer, other driven device.