The Application Of Electro-rheological Technology On Electro-Hydraulic Braking Control System

The electro-rheological (ER) technology is a rising edge knowledge with so much superior advantages and applications that it has been given much attention all over the world. The core of ER technology is ER fluid which viscous co-efficient changes rapidly, continuously and reversibly under electronic field. Electro-hydraulic braking control system using ER fluid can control the pressure, flow, direction, so it is an important application in hydraulic control based on ER technology. At present, researches are on property and structure of single ER-valve. The work performances of several ER valves under practical application state are analyzed and its high-voltage control power source is studied in this dissertation.The development trends of ER technology, theory of ER effect and principle of engineering application are presented. The requirements for ER fluid's substitution to traditional hydraulic oil are brought forward. The control equation of single ER valve is derived.Two mathematic models of ER valve-cylinder actuator are constructed according to control methods of ER valve-cylinder. And a position control system based on ER valve-bridge actuator is simulated. The result shows that the system has good dynamic performance.