SIMULINK

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SIMULINK

• Dr. Samir Al-Amer

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SIMULINK

• SIMULINK is a power simulation program that comes
  with MATLAB
• Used to simulate wide range of dynamical systems

• To run SIMULINK
• Run MATLAB
• Click on the SIMULINK icon on tool bar
• SIMULINK automatically open a work file and the
  main libraries.

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To be able to use SIMULINK

• You need to learn to do the following
• manipulate blocks
• use blocks to build models
• run simulation
• modify simulation parameters

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SIMULINK BASICS

• A systems is represented by a block diagram
• You select the block from a library of blocks
• You need to know the library that contains the
  block that you need
• click on the library name and you will see a list
  of blocks in that library
• click on the block that you want and drag it to
  the work file
• click on the block to select its parameters
• Connect it to other blocks

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SIMULINK LIBRARIES

• Sources
• Sinks
• Continuous
• Discrete
• Function Tables
• Math
• Nonlinear
• Signals Systems
• Subsystems

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General Procedure

• Open the library that contains the block of
  interest
• Click on the block that you need and drag it to
  the work area
• Click the left mouse button to see and modify the
  block parameters.
• You can do the above by clicking the right button
  and select the block parameters.
• Connect the input and outputs of the block

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SIMULINK LIBRARIES

• Sources Used to generate input signals
• Sinks Used to display results/signals
• Continuous To represent continuous systems
• Discrete To represent discrete systems
• Math Some mathematical functions

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Sourceto generate input signals

• Step to generate step input
• Ramp to generate ramp input
  
• sine Wave to generate sine wave
  input
• Clock
• Constant
• Pulse generator
• Signal Generator

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Constant (SOURCE LIBRARY)

• The output of the constant block is a constant
  number

Select the source library click on the constant
block drag the block to the work file click on
the block update the parameters of the
block (change the constant) Connect the block to
other blocks
Constant
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Step (SOURCE LIBRARY)

• The output of the step block is step function.
  User can select step time, initial value (value
  before step time) and final value (the value
  after)

Select the source library click on the step
block drag the block to the work file click on
the block update the parameters of the
block (change the step time, Initial value and
final value ) Connect the block to other blocks
step
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Linear

• SUM
• GAIN
• Derivative
• Integrator
• State Space
• Transfer function

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Gain (Linear library)

• Gain

select linear library drag the GAIN to the work
file click on GAIN to select the gain. You can
rotate gain block connect it to other blocks
K
gain
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Integrator (Linear library)

• INTEGRATOR

select linear library drag the INTEGRATOR to the
work file You can adjust initial conditions if
needed. connect it to other blocks
integrator
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Sink

• Display displays the numerical value of the
  signal
• Scope plot the signal
• To File save in a file
• To Workspace store the signal in a MATLAB
• variable in the MATLAB
• workspace

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Sink

• To Workspace store the signal in a MATLAB
• variable in the MATLAB
• workspace.
• workspace.
• This is very useful when you want to do further
  processing to the result of the simulation.
• ---click on the box to select the variable
  name---

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Block diagrams for SIMULINK Simulation

• simulate the following system

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Example
- -
sin
integrator
sum
integrator
2
gain
adjust gain , sum and sine blocks
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• Do the three exercises in the handout