PROJECT TITLE :

A Hybrid Displacement/Pressure Control Scheme for an Electrohydraulic Flow Matching System

ABSTRACT:

The electrohydraulic flow matching system is one in all the foremost promising fluid power technologies for the improvement of the control performance and system efficiency of mobile machinery. But, pressure impacts and low efficiencies caused by flow excess are vital drawbacks that hinder its development. To solve this problem, this paper proposes a hybrid displacement/pressure control theme by utilizing a switching rule in line with the pressure margin and also the candidate Lyapunov function. The mathematical model of an electrohydraulic flow matching system with primary pressure compensators was established, and also the energy efficiency performance was analyzed. Experimental tests in single-actuator and dual-actuator systems were administered on a test rig with a hydraulic excavator. The experimental results indicated that the pump pressure may be reduced when the provided flow was excessive, and additionally the system potency was improved. The proposed controller is easy and pragmatic therefore that it can be simply implemented in this mobile machinery.