公开(公告)号：US20220252090A1

公开(公告)日：2022-08-11

申请号：US17562449

申请日：2021-12-27

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： QingHui YUAN

IPC: F15B21/00 ,  E04G21/04 ,  F15B13/01 ,  F15B15/20 ,  F15B20/00 ,  E02F9/22

Abstract: A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises at least one motion sensor operable to measure movement of such boom or elongate member resulting from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust the hydraulic fluid flow to the load holding chamber of an actuator attached to the boom or elongate member to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.