Software Listing of Author : "M Galal Rabie"

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

  • Platform: Matlab, Scripts

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, force, and others. They incorporate, mostly, a two-stage electrohydraulic servovalve and hydraulic actuator; linear or rotary. The description of construction, operation and mathematical modeling are given in my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 340-350 and 354-357

  • Platform: Matlab, Scripts

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 servoactuator and steps of design of the PI controller are given in my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 340-350 and 354-357

  • Platform: Matlab, Scripts

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 book: Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 336-340 and 349-352

  • Platform: Matlab, Scripts

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 positions and equipped with a feedback arrangement. This simulink file simulated the dynamic behavior of a hydraulic servoactuator. The simulation program is based upon a detailed nonlinear model and a transfer function. The construction, operation, applications and mathematical models are given in my book: M Galal Rabie, Fluid power Engineering, McGraw-Hill, NY, May 2009.

  • Platform: Matlab, Scripts

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

  • Platform: Matlab, Scripts

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 theory is explained in my book: M Galal Rabie, Fluid power Engineering, McGraw-Hill, NY, 2009, pp 19-20, 29-30, 33-37 and 72-76

  • Platform: Matlab, Scripts

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 is developed to evaluate the applicability of oleo-pneumatic accumulators for the protection against this phenomenon. A lumped parameter model was developed for the transmission line, assuming four lumps, considering the effect of line resistance, inertia and capacitance. The validity of lumped parameter models is evaluated by comparing theoretical results with published experimental results. This part is also available on the Matlab file exchange. The theory and results discussion are published in my paper: M. Galal Rabie, " On the Application of Oleo-Pneumatic Accumulators for the Protection...

  • Platform: Matlab, Scripts

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 servoactuator and steps of design of the PI controller are given in my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 340-350 and 354-357

  • Platform: Matlab, Scripts

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: * Construction and operation of the valve * Mathematical modeling * Computer simulation using Simulink * A discussion of the static and dynamic characteristics of the valve, based on the simulation results. The theoretical analysis is presented in the following book, pages 198 to 205: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009.

  • Platform: Matlab, Scripts

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 calculation, please refer to my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 336-342 and 352-354

  • Platform: Matlab, Scripts

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 Engineering, McGraw-Hill, NY, May 18, 2009, pp 336-340 This program calculates the torque of an electromagnetic torque motor, considering the ferromagnetic hysteresis. The calculation algorithm is based on the following paper: Hay J.L. and Chaplin R.I., 'Dynamic Simulation of Ferromagnetic Hysteretic Behavior by Digital Computer,' Simulation, December 1975, pp 185-191.

  • Platform: Matlab, Scripts

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, force, and others. They incorporate, mostly, a two-stage electrohydraulic servovalve and hydraulic actuator; linear or rotary. The description of construction, operation and mathematical modeling are given in my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 340-350 and 354-357

  • Platform: Matlab, Scripts

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 book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 336-340 and 349-352

  • Platform: Matlab, Scripts

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 calculation, please refer to my book: M Galal Rabie, Fluid Power Engineering, McGraw-Hill, NY, May 18, 2009, pp 336-342 and 352-354

  • Platform: Matlab, Scripts

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

  • Platform: Matlab, Scripts
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