Fishkill Ny

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,...

Both functions caculate the Lomb normalized periodogram (aka Lomb-Scargle, Gauss-Vanicek or Least-Squares spectrum) of a vector x with coordinates in t, which is essentially a generalization of the DFT for unevenly sampled data.The codes are transcriptions from Fortran of the subroutines found in...

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...


Platforms: Matlab

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


Platforms: Matlab

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,...


Platforms: Matlab

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 336-340This...


Platforms: Matlab

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


Platforms: Matlab

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....


Platforms: Matlab

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...


Platforms: Matlab

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,...


Platforms: Matlab

Relief Valve DynamicsModeling and Simulation of a Hydraulic Relief ValveThe attached file presents a simulation of a direct-operated hydraulic relief valve with built-in damper. The study of the valve included the following:d-deD? Construction and operation of the valved-deD? Mathematical...


Platforms: Matlab

Lumped Parameter Model of Hydraulic Transmission lineHere 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...


Platforms: Matlab

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,...


Platforms: Matlab

WGOVCWC(SID) queries the XML Feeds of Current Weather Conditions asprovided by NOAA's National Weather Service (http://www.weather.gov), andreturns a struct containing current weather conditions for the areaspecified by the corresponding four char SID(s) (Station ID(s)).Data is available only for...


Platforms: Matlab

Certain electromagnetic scattering problems have analytical solutions. In the cylindrical coordinate, the solutions are expressed in the series form of the products of the Bessel functions and exponential functions. This package contains the code that implements the field solutions asa) a...


Platforms: Matlab

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,...


Platforms: Matlab

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...


Platforms: Matlab

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...


Platforms: Matlab

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,...


Platforms: Matlab

The characterisation of the downsampler block can be done by the formula:y(n)=x(nM)Syntax:[y ny]=downsampler(x,n,M)x is an input sequence over indices specified by n.L is the downsampling rate.It ignores (M-1) samples between kth sample and (k+M)th sample.y is the output sequence over indices...


Platforms: Matlab