US 11,536,298 B2 · System with motion sensors for damping mass-induced vibration in machines

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.

Claims19

Dependent claims

An apparatus for damping mass-induced vibration in a machine including an elongate member and a hydraulic actuator configured to move the elongate member and having a non-load holding chamber and a load holding chamber, said apparatus comprising:

a motion sensor operable to measure movement of the elongate member resulting from mass-induced vibration;
a plurality of control valve spools operable to supply variable flow rates of hydraulic fluid to the hydraulic actuator;
a control manifold fluidically interposed between the hydraulic actuator and said plurality of control valve spools;
and
a processing unit operable with said control manifold to control the flow of hydraulic fluid to the hydraulic actuator based at least in part on measurements of movement of the elongate member received from the motion sensor, and the processing unit receives movement data from the motion sensor for use as a variable to calculate a flow rate value for a flow control mode of at least one valve spool of the plurality of control valve spools.

2 more elements

A system for damping mass-induced vibration in a machine, the system comprising:

a processing unit;
and
a memory device storing software instructions which, when executed by the processing unit, cause the processing unit to:
receive movement data from a motion sensor, the movement data measuring mass-induced vibration of an elongate member connected to a hydraulic actuator of the machine, the hydraulic actuator having a non-load holding chamber and a load holding chamber, and the hydraulic actuator being configured to move the elongate member;
control a flow of hydraulic fluid to the hydraulic actuator by:
operating a first control valve spool associated with the non-load holding chamber of the hydraulic actuator in a pressure control mode;
and
operating a second control valve spool associated with the load holding chamber of the hydraulic actuator in a flow control mode;
wherein the processing unit independently controls the first and second control valve spools, and wherein the processing unit uses the movement data as a variable in calculating a flow rate value for the flow control mode of the second control valve spool.

6 more elements

Dependencies are inferred from the claim text.

System with motion sensors for damping mass-induced vibration in machines

Life of this patent

System with motion sensors for damping mass-induced vibration in machines

Life of this patent

Abstract

Claims19