Comparative Analysis of Independent Metering and Digital Directional Valve Controlled Power Actuator System Using Simulation Study
摘要
Hydraulic systems are widely used in a variety of industrial applications and are essential for mobile machinery used in the agricultural, construction, and mining sectors. The mobile equipment used in these industries involves hydraulic systems coupled with power actuators that deal with heavy loads and require precise control, reliable operation, and high efficiency to improve productivity, efficiency, and energy-saving. The said controls of the power actuator are achievable by deploying two methods, one by independent metering technology using two proportional directional control valves and the second one by using a digital directional valve. The present article discusses and compares the said two control methodologies using Automation Studio® simulation software. The simulation studies are made for actuator displacement and pressure at different load conditions. It is found that the digital directional valve controlled hydraulic system demonstrates better dynamic performance and control compared to the independent metering control technology. The digital directional valve control ensures that system pressure remains constant regardless of the load variations, which decreases throttle loss and pressure fluctuation in the hydraulic system.