Integrated Electrohydraulic Actuator

An electrohydraulic actuator comprising:

• a housing;
• a hydraulic cylinder actuator disposed within the housing and comprising a cylinder and a piston, wherein the piston divides an internal space of the cylinder into a first chamber and a second chamber, and wherein the hydraulic cylinder actuator is unbalanced such that a first fluid flow rate of fluid provided to the first chamber or the second chamber to drive the piston in a given direction is different from a second fluid flow rate of fluid discharged from the other chamber as the piston moves;
• an accumulator disposed within the housing and comprising an annular fluid chamber encircling the cylinder of the hydraulic cylinder actuator, wherein the accumulator is configured to provide boost fluid flow from the annular fluid chamber or receive excess fluid flow at the annular fluid chamber, wherein the boost fluid flow or excess fluid flow comprises a difference between the first fluid flow rate and the second fluid flow rate;
• and
• an assembly disposed within the housing and comprising:
• (i) a pump configured to be a bi-directional fluid flow source, and (ii) an electric motor configured to drive the pump in opposite rotational directions to provide fluid flow to the first chamber or the second chamber of the hydraulic cylinder actuator to drive the piston.