Determination of Nonlinear Mathematical Model for Hydraulic Regulator Using Bond Graph Method
by
Hamed Hossein Afshari
Iran - Tehran - K.N.Toosi University of Technology - Aerospace Department
Coauthors: Amir Zanj, Dr.Alireza Novinzadeh, Norollah Rostamy

The modeling process whereby distributed parameter fluid systems for a fluid pressure regulator using bond graph technique is obtained. In this work, a nonlinear dynamic model of a hydraulic pressure regulator is established and analyzed. This regulator composes of several elements which can transmit, transform, store and consume the hydraulic energy. It is possible for the regulator to reduce the moving fluid pressure to each required value with respect to the atmosphere pressure. It should be noted that the nonlinear behavior of regulator is caused from two elements. The first element is a nonlinear orifice which its hydraulic resistance varies with the motion of mechanical subsystem. The second element includes two throttle valves which could be adjusted manually. Furthermore, the state-space equations are derived and solved to find the dynamic response curve of the operating system under various conditions. By comparing the determined response curve with the experimental curve, the accuracy of bond graph technique for modeling the nonlinear systems is validated appropriately.

Date received: March 11, 2008

Copyright © 2008 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cawz-01.