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Here is a simple Simulink file to calculate the stiffness of hydraulic spring.
The theory is explained in my book:
M Galal Rabie, Fluid power Engineering, McGraw-Hill, NY, 2009, pp 235-237



The electromagnetic torque motors are widely used in electrohydraulic servovalves. They serve to convert the control current into a proportional torque. For more details about the steady state and transient response calculation, please refer to my...



Here is a simple Simulink file to calculate the bulk modulus of oil-air mixture.
The theory is explained in my book:
Bulk Modulus of oilM Galal Rabie, Fluid power Engineering, McGraw-Hill, NY, 2009, pp



This file illustrates the effect of a properly designed proportional integral controller on the performance of Electrohydraulic servoactuators. The description of construction, operation and mathematical modeling of the Electrohydraulic...



The electrohydraulic servovalves are mostly multi-stage. They incorporate, mostly, a first stage which serves to convert the command current into a proportional pressure difference. For more details about the steady state and transient response...



Lumped Parameter Model of Hydraulic Transmission line
Here is a lumped parameter model of a hydraulic transmission line.
The line is modeled by one, two, three, four and ten lump models.
The simulation program presents the transient...



The electromagnetic torque motors are widely used in electrohydraulic servovalves. They serve to convert the control current into a proportional torque. For more details about the steady state and transient response calculation, please refer to my...



The electrohydraulic servovalves are mostly multi-stage. They incorporate, mostly, a first stage which serves to convert the command current into a proportional pressure difference. For more details about the steady state and transient response...



Here is a simple Simulink file to calculate the stiffness of hydraulic spring.
The theory is explained in my book:
M Galal Rabie, Fluid power Engineering, McGraw-Hill, NY, 2009, pp 235-237



Electrohydraulic servoactuators provide one of the best controllers from the point of view of precision and speed of response. They are used to control wide range of mechanical parameters, such as the displacement, angular displacement, strain,...



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,...



The remarkable advance in hydraulic and electrohydraulic power systems resulted in producing control valves of very short settling time. The rapid closure of hydraulic transmission lines leads to severe pressure surge. The attached Simulink file...



The remarkable advance in hydraulic and electrohydraulic power systems resulted in producing control valves of very short settling time. The rapid closure of hydraulic transmission lines leads to severe pressure surge. The attached Simulink file...



This file illustrates the effect of a properly designed proportional integral controller on the performance of Electrohydraulic servoactuators. The description of construction, operation and mathematical modeling of the Electrohydraulic...



FlyCarpet is a rapid and visual modeling software platform for dynamic/static system design/optimization/simulation, it models multi-industry system with components and platform features, so this software can be used for many fields as fluid,...



Implements the Complex Method of Constrained Optimization, as proposed by Box (1965), improved by Guin (1968) and Krus (1992), and following the method in Andresson (2001). This is capable of optimizing a "black-box" system with few...



The electromagnetic torque motors are widely used in electrohydraulic servovalves. They serve to convert the control current into a proportional torque. For more details about this issue, please refer to my book:
M Galal Rabie, Fluid Power...



Hydraulic servo actuators (HSAs) are used to precisely control displacement in a wide range of equipment. Generally, a hydraulic servo actuator consists of a hydraulic actuator controlled by a directional control valve of an infinite number of...



Relief Valve Dynamics
Modeling and Simulation of a Hydraulic Relief Valve
The attached file presents a simulation of a direct-operated hydraulic relief valve with built-in damper. The study of the valve included the following:



Here is a lumped parameter model of a hydraulic transmission line.
The line is modeled by one, two, three, four and ten lump models.
The simulation program presents the transient response in addition to experimental results.
The...