HYDRAULIC CONTROL SYSTEM UTILISING FEED-FORWARD CONTROL Russian patent published in 2014 - IPC E02F9/22 

FIELD: physics; control.

SUBSTANCE: disclosed group of inventions relates to a hydraulic control system for working machines. The hydraulic control system has a pump, a tool actuator, a tool control valve configured to control the flow of pressurised fluid fed to the tool actuator, and a controller. The controller includes a feed-forward control map which responds to the intended change in the required flow rate with the possibility of relating the tool movement request to the change in discharge flow rate of the pump, and operably connected to the tool control valve and the pump. The controller can further be configured to receive a tool movement request. The controller can further be configured to estimate changes in the required flow rate of the tool control valve associated with the tool movement request. The controller can also be configured to generate instructions for adjusting the discharge flow rate of the pump based on the intended change in the required flow rate to execute the tool movement request. Also disclosed are a method of controlling tool movement and a machine having said hydraulic system.

EFFECT: providing feed-forward control to change supply of a liquid before the need thereof arises.

19 cl, 3 dwg