Two-Stage Electrohydraulic Servovalve

Transient Response of Two-Stage Electrohydraulic Servovalve

Electrohydraulic servo systems provide one of the best controllers from the point of view of precision and speed of response. They are used to control almost all hydraulic and mechanical parameters, such as the pressure, pressure difference, angular speed, displacement, angular displacement, strain, force, and others.
The electrohydraulic servovalves are mostly multi-stage. This file presents a simulation program of a two-stage servovalve. It includes also a representative model of the servovalve, a second order transfer function.
For more details about the transient response calculation, please refer to my book:
M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 340-350 and 354-357