ELECTROHYDRAULIC VIBRATION TEST BED Russian patent published in 2010 - IPC G01M7/02 

FIELD: physics.

SUBSTANCE: device has an actuating cylinder with a plunger which forms two hydraulic chambers, and a table with displacement and acceleration sensors, a pump installation, a hydraulic accumulator, a control unit, a measurement unit, a communication line for components and hydraulic and electrical units. Each of the two hydraulic chambers of the actuating cylinder with different area is fitted with an electrohydraulic servo-valve with minimum length of the connection channels. The control unit has two outputs for control signals which are out of phase by 180° and have equal amplitude. A collector which is common for the two servo-valves is fitted on the line carrying the working fluid to the servo-valves.

EFFECT: broader functional capabilities, providing operation in wide frequency range.

1 dwg