Experiments indicate that at small servovalve spool displacements, leakage flow between the valve spool and body dominates the orifice flow through the valve. In precision positioning applications, where the servovalve operates within the null region, this flow, if ignored, may severely degrade the performance of a conventional servohydraulic design. We have developed an improved servovalve model that combines both leakage and orifice flow. The model was developed by reviewing experimental leakage flow data and identifying a simple mathematical form that (1) made physical sense and (2) replicated experimental data. When combined with orifice relations, the model extends the accuracy and region of applicability of existing servovalve models. Furthermore, the combined model is easily parameterized using available manufacturer data. [S0022-0434(00)00403-2]
Skip Nav Destination
eryilmaz@coe.neu.edu
wilson@neu.edu
Article navigation
September 2000
Technical Briefs
Combining Leakage and Orifice Flows in a Hydraulic Servovalve Model1
Bora Eryilmaz, Graduate Student,
eryilmaz@coe.neu.edu
Bora Eryilmaz, Graduate Student
Department of Mechanical, Industrial, and Manufacturing Engineering, Northeastern University, Boston 02115
Search for other works by this author on:
Bruce H. Wilson, Assistant Professor
wilson@neu.edu
Bruce H. Wilson, Assistant Professor
Department of Mechanical, Industrial, and Manufacturing Engineering, Northeastern University, Boston 02115
Search for other works by this author on:
Bora Eryilmaz, Graduate Student
Department of Mechanical, Industrial, and Manufacturing Engineering, Northeastern University, Boston 02115
eryilmaz@coe.neu.edu
Bruce H. Wilson, Assistant Professor
Department of Mechanical, Industrial, and Manufacturing Engineering, Northeastern University, Boston 02115
wilson@neu.edu
Contributed by the Dynamic Systems and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the Dynamic Systems and Control Division December 17, 1999. Associate Technical Editor: E. Fahrenthold.
J. Dyn. Sys., Meas., Control. Sep 2000, 122(3): 576-579 (4 pages)
Published Online: December 17, 1999
Article history
Received:
December 17, 1999
Citation
Eryilmaz, B., and Wilson, B. H. (December 17, 1999). "Combining Leakage and Orifice Flows in a Hydraulic Servovalve Model." ASME. J. Dyn. Sys., Meas., Control. September 2000; 122(3): 576–579. https://doi.org/10.1115/1.1286335
Download citation file:
Get Email Alerts
Hybrid Kinematic-dynamic Sideslip and Friction Estimation
J. Dyn. Sys., Meas., Control
Koopman Model Predictive Control of an Integrated Thermal Management System for Electric Vehicles
J. Dyn. Sys., Meas., Control
Electromagnetic Model of Linear Resonant Actuators
J. Dyn. Sys., Meas., Control (May 2023)
Discrete Robust Control of Robot Manipulators Using an Uncertainty and Disturbance Estimator
J. Dyn. Sys., Meas., Control (May 2023)
Related Articles
Hydraulic Servo System With Mechanically Adjustable Compliance
J. Dyn. Sys., Meas., Control (March,2002)
An Investigation Into the Characteristics of a Two Dimensional “2D” Flow Control Valve
J. Dyn. Sys., Meas., Control (March,2002)
Nonlinear Model-Based Control of Pulse Width Modulated Pneumatic Servo Systems
J. Dyn. Sys., Meas., Control (September,2006)
Dynamic Constraint-Based Energy-Saving Control of Pneumatic Servo Systems
J. Dyn. Sys., Meas., Control (September,2006)
Related Proceedings Papers
Related Chapters
Section XI: Rules for Inservice Inspection and Tests of Nuclear Power Plant Components
Online Companion Guide to the ASME Boiler and Pressure Vessel Codes
Pressure Testing
Power Piping
Case Studies
Nonlinear Regression Modeling for Engineering Applications: Modeling, Model Validation, and Enabling Design of Experiments