This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Optimal Velocity Control and Cavitation Prevention of a Hydraulic Actuator Using Four Valve Independent Metering
Technical Paper
2005-01-3620
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A revolution in mobile hydraulic equipment is occurring. Conventional hydraulic spool valves with hydromechanical pressure compensators are being replaced by valve assemblies with four valve independent metering with electronically-controlled pressure compensation. In the system described here, two of the four independent valves are active during metering. This new topology offers significant advantages due to the two degrees of freedom provided. One of these degrees of freedom used to control velocity is more fully described in a related paper.
In this paper, it is shown how the second degree of freedom can be used to control pressure in an actuator workport or minimize velocity errors due to valve coefficient errors. Workport pressure control can be used to limit maximum or minimum workport pressures (e.g. prevent cavitation). Given certain criteria, an optimal solution can be obtained.
Recommended Content
Technical Paper | A Novel Method of Controlling a Hydraulic Actuator with Four Valve Independent Metering Using Load Feedback |
Ground Vehicle Standard | Hydraulic Motor Test Procedures |
Technical Paper | International Space Station Nitrogen System Performance |
Citation
Tabor, K., "Optimal Velocity Control and Cavitation Prevention of a Hydraulic Actuator Using Four Valve Independent Metering," SAE Technical Paper 2005-01-3620, 2005, https://doi.org/10.4271/2005-01-3620.Also In
Simulation and Optimization: System Level, Component Level, Advanced Technology/Methodology
Number: SP-1989; Published: 2005-11-01
Number: SP-1989; Published: 2005-11-01
References
- Jansson, A. et al. Separate Controls of Meter-in and Meter-out Orifices in Mobile Hydraulic Systems SAE Technical Papers Series Sep 1989 1 7 SAE International Warrendale, PA
- Pfaff, J. Tabor, K. 2004 Velocity Based Electronic Control System for Operating Hydraulic Equipment May
- Pfaff, J. Tabor, K. 2005 Method of Selecting a Hydraulic Metering Mode for a Function of a Velocity Based Control System April
- Pfaff, J. Tabor, K. 2004 Method of Sharing Flow of Fluid Among Multiple Hydraulic Functions in a Velocity Based Control System August
- Tabor, K. 2004 Velocity Based Method for Controlling A Hydraulic System April
- Tabor, K. 2004 Velocity Based Method of Controlling an Electrohydraulic Proportional Control Valve August
- Tabor, K. 2005 A Novel Method of Controlling a Hydraulic Actuator with Four Valve Independent Metering Using Load Feedback SAE paper in process Nov.
- Yang, X. et. al. 2001 Bidirectional Pilot Operated Control Valve December