公开(公告)号：US09879667B2

公开(公告)日：2018-01-30

申请号：US14633653

申请日：2015-02-27

Applicant: DANFOSS POWER SOLUTIONS INC.

Inventor： Abhijit Das

IPC: G06F17/11 ,  F04B49/06 ,  F04B1/26

CPC classification number: F04B49/065 ,  F04B1/26 ,  G06F17/11

Abstract: A variable load sense spring setting for an axial piston open circuit having three subsystems. A backstepping control applied to the first and second subsystems to determine an operator control input and a load sense spool effective open area control input that stabilize the first and second subsystems. The calculating a feasible load sense area from the third subsystem and the control inputs.