Intelligent Operation of Wheel Loader Based on Electrohydraulic Proportional Control

Abstract

In this paper, the wheel loader with electrohydraulic proportional control technology is used as the carrier. For the first time, the dual-angle sensor is used for intelligent operation, which allows the wheel loader working device to be precisely controlled. First, the theoretical analysis of the electrohydraulic proportional control technology on the wheel loader studied in this paper is carried out. Next, according to the feedback of the boom and bucket angle sensor signals, the electrohydraulic proportional control technology is used to initially realize the boom memory and bucket automatic levelling function of the wheel loader working device. Finally, the data acquisition equipment is connected to provide experimental verification, although the test results did not achieve precise control of the working device. After analysis, the detected problems were solved by constructing a neural network algorithm model, which successfully realizes the intelligent and precise operation of the wheel loader, reducing unnecessary energy loss.

Research on Hydro-pneumatic Suspension Test Bench Based on Electro-hydraulic Proportional Control

“…Because the electro-hydraulic proportional directional valve has the characteristics of strong anti pollution ability, high work efficiency, relatively low price, high control accuracy, and its performance is similar to that of the on-off valve. The comprehensive performance of proportional valve is no less than that of servo valve [11,12]. Therefore, the electro-hydraulic proportional directional valve is selected to control the liquid flow and flow direction.…”

Energy Efficiency and Limitations of the Methods of Controlling the Hydraulic Cylinder Piston Rod under Various Load Conditions

“…The developed controller uses a constraint maintenance technique (PPC), which improves the output response and facilitates the expected performance. In Cao et al [39], the issue of proportional control applied to the control of an electrohydraulic wheel loader is described. To control the working device of the machine accurately, a double-angle sensor was used.…”