MODELING AND CONTROLLING OF AN ELECTRO-HYDRAULIC ACTUATOR NOVEL BY USING INDEPENDENT METERING VALVE

Abstract

In recent year, hydraulic system research mainly focus on way of saving energy. Because in hydraulic systems the efficiency is quite low. In mobile hydraulic equipment, conventional hydraulic spool valves with pressure have already been replaced by valve assemblies with four-valve independent metering valve (IMV) with electronically controlled pressure compensation. The independent metering concept and microprocessor control have potential to save energy rather than conventional proportional valve control. This paper presents the structure and dynamic of a new hydraulic cylinder circuit using independent metering valves combine with control variable displacement pump to saving energy. This hydraulic circuit is simulated and compared with conventional by AMESim and Matlab Software. In IMV circuit, five Modes are compared together for verify the saving energy. Moreover, the mathematical model presented to model the dynamic of cylinder and all parameter of circuit get from the real system.