Linear Analysis to Control an Electro-hydraulic System Using Proportional Directional Control Valve

Abstract

In the field of hydraulic control system the performance including the stability of the
system are important parts of hydraulic system working. In this work electro-hydraulic
control circuits including a proportional directional control valve have been designed.
A mathematical model developed to determine the natural frequency and damping
ratio using Matlab software.
To find out the stability of the system a proportional plus, integral plus, derivative
(PID controller) control was used.
The analysis was conducted with an experimental work to study the pressure drop,
loading pressure, and flow rate and extension velocity with and without external load.
A comparison between the theoretical and experimental work and literature showed