Jet pipe electrohydraulic servovalve finds main application in feedback control systems working on jet engine and fighter aircrafts. The analyzed jet pipe electrohydraulic servovalve is used in precise fuel control applications in gas turbine engine. This paper gives a new approach for servovalve modeling with the hydrostatic fluid elements in achieve steady state operation. The actual flow required to achieve the force balance is presented analytically. FE model gives the relationship between the spool and jet pipe position in achieving the steady state operation., The spool end cavity volume changes are presented.

Ramarathnam Krishna Kumar

Department of Engineering Design

Makaram Singaperumal

Actuators

Electric currents

Electromechanical devices

Fighter aircraft

finite element method

Flow of fluids

Gas turbines

Hydraulics

Jets

Kinetic energy

Sensors

Stiffness

Torque

Cavity volume

FLUID FLUX

HYDROSTATIC FLUID ELEMENT

JET PIPE

Valves (mechanical)

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

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IIT Madras

FE Approach: Electro-Mechanical-Fluid Interaction of Jet Pipe Electrohydraulic Flow Control Servovalve

American Society of Mechanical Engineers, The Fluid Power and Systems Technology Division, FPST

In the present paper an attempt has been made to predict the behavior of some precision hydraulic components such as feed back spring and flexure tube. The performance of the valves depends on so many parameters. The feed back spring and flexure tube elements are identified as more critical spring elements in servovalve operation. If these elements are properly designed with respect to stiffness, automatically dynamic performance of the servovalve is improving. Hence an attempt has been made to predict the stiffness of these elements by finite element method. The solid model of these components are carried out in IDEAS-Master modular and simulated by applying the suitable boundary and loading conditions. The stress concentration areas in these components due to loading are shown. The critical affecting dimensional sensitivity analysis is carried out using FEM and results are presented.

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

Stiffness analysis of feed back spring and flexure tube of jet pipe electrohydraulic servovalve using finite element method

Mechatronic Modeling and Simulation Using Bond Graphs

Drawing Bond Graphs for Simple Systems

IEEE Transactions on Robotics and Automation

An analytical and experimental investigation of a jet pipe controlled electropneumatic actuator

Journal of the Institution of Electrical Engineers - Part IIA: Automatic Regulators and Servo Mechanisms

Discussion on “Some naval applications” at the Convention on Automatic Regulators and Servo Mechanisms, 20th May, 1947

FE approach: Electro-mechanical-fluid interaction of jet pipe electrohydraulic flow control servovalve

Journal	American Society of Mechanical Engineers, The Fluid Power and Systems Technology Division, FPST
Publisher	American Society of Mechanical Engineers (ASME)
Open Access	No