Algorithm Design for the Novel Mechatronics Electro-Hydraulic Driving System: Micro-Independent Metering

This paper presents a control algorithm for a novel Mechatronics Electro-hydraulic Driving System, Micro-Independent Metering. The main idea of the independent metering is a separated control of the hydraulic actuator ports which are the meter-in and the meter-out. IM technique configuration relies upon different types of valves, especially on poppet valves. As these valves have stability limitations, a novel stepped rotary valve was developed to configure a novel IM form. This form is termed as micro-independent metering due to the activation technique of the valve. A novel algorithm was developed to control this new configuration. The algorithm implements the rules of the independent metering using the new valve. It is able to detect the different operation modes and make a real time changing between them. Also, it activates the enhanced performance technique which was especially developed for this new configuration. The paper includes the mathematical analysis of the developed algorithm and its State-flow representation. Also, it includes the simulation of the system performance and the effect of MIM on the cylinder velocity.