Analysis and experimental validation of a pressure control method using magneto-rheology fluid flows

• Main Authors: Fan Wang, Ning Guo, Linxiang Wang
• Format: Article
• Language: English
• Published: Wiley 2018-10-01
• Series: The Journal of Engineering
• Subjects: pressure control; magnetorheology; valves; design engineering; servomechanisms; magneto-rheology fluid flows; spool; controlled pressure difference; hydraulic servo valve; actuating mechanism; tuning magneto-rheological fluid flow; controlled chamber pressure; nonconvex constitutive relation; MR fluid; electrical flow; numerical results; experimental results; quick pressure change; flow rate applications; experimental validation; pressure control method
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8993

In this study, a spool actuating mechanism using controlled pressure difference is proposed for a large hydraulic servo valve. The actuating mechanism is accomplished by tuning magneto-rheological (MR) fluid flow. The relationship between the flow rate and the controlled chamber pressure is obtained based on a non-convex constitutive relation of the MR fluid. The control of the pressure difference by tuning the electrical flow is simulated. A series of experiments are carried out on a prototype system; the numerical and experimental results show that the proposed system can produce a very quick pressure change, which can be used to actuate the spool of the hydraulic servo valves for large flow rate applications.