Hydraulic control uses oil as working medium, which can bring heat generated by power loss from the place where it occurs, so that the size of the component can be greatly reduced under a certain power situation.

Judging from the impact of load, the hydraulic system is mechanically rigid, and the positioning stiffness is greater and the position error is small in closed-loop systems.

Compared with mechanical mechanisms, the hydraulic actuator has a higher response speed, can start, brake and reverse at high speed, and its torque-inertia ratio is also larger, so its acceleration ability is stronger.