Discrete Systems with Python
[Pages:54]
Discrete Systems with Python
Hans-Petter Halvorsen
Free Textbook with lots of Practical Examples
Additional Python Resources
Contents
? Differential Equations ? Simulation ? Discrete Systems ? Examples
Simulation of Discrete Systems
? Python has powerful features for simulation of continuous differential equations and dynamic systems.
? Sometimes we want to or need to discretize a continuous system and then simulate it in Python.
? This means we need to make a discrete version of our continuous differential equations.
? The built-in ODE solvers in Python use different discretization methods
Differential Equations
Hans-Petter Halvorsen
Differential Equations
Differential Equation on general form:
= , ,
! = !
Different notation is used:
Initial condition Example:
= ! =
= 3y + 2,
! = 0
ODE ? Ordinary Differential Equations
Differential Equations
Example:
=
Note that = !"
!#
Where ! = 0 = (!) is the initial condition
Where = - #", where is denoted as the time constant of the system
The solution for the differential equation is found to be (learned in basic Math courses and will not be derived here):
= !"#
Where $ = 0 = ($) is the initial condition
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