Bodex

BodeX v.2.2.1 user’s manual by
®

92BROTHERS
http://www.92brothers.net/
92brothers@infinito.it

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92BROTHERS® studio

§ About BodeX
The best program for TI calculators thattrace frequency plot of a transfer function W(s) of a
SISO or MIMO system (Bode plots) with or withoout time delay. BodeX use a powered routine
to plot the phase plot of a transfer function (don't usesimply the angle(•) function). The
BodeX routines ensure the correct phase plot any W(s) it's plotted.
What’s new in version 2.2.1:
• new routine for faster plotting;
• now you can specify thetime delay separately by system;
• routine for auto setting of frequency range;
• in Split Screen Mode you can have plot info for MAG or Phase plot;
• a simple set of graph tools to elaborate plots;• user’s manual in PDF.
To demonstrate the power of BodeX related to the others bode plotter try plot the phase plot
of this system:
(s+100)^2/(s(s+1)^2(s+10)(s+5i)(s-5i))

 

 

 

ONLYBodeX RETURN THE RIGHT PLOT. The routine is slowest than the simple angle(•) function
but it works!

§ Systems Modelling
LTI Systems models are specified by transfer function of the system(Laplace variable mus be
s). If there is a time delay, it must specified in a specific field.
If system is a MIMO (Multiple Input Multiple Output) the system must be defined by a matrix
of transferfunctions. If the system has M inputs and N output the system SYS must be a
matrix (NxM) where SYSij it's the tranfer function from the input to the output .Time
delay must be: a numbers if SYS it’sSISO, a matrix (NxM) if SYS has M inputs and N outputs
(setting time delay to zero, for MIMO systems it’s interpreted as a [[0]] matrix (NxM))
§ BodeX commands
To run BodeX program type bodex in theHOME screen and press . When dialog
box apper you must:
• enter the system (or matrix of systems) model by transfer function (Laplace variable
mus be s). This field it’s blank by default
• enter...