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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexsys Discrete Time Domain Analysis >
   Nexsys MATLAB User Defined Models >
       Example MATLAB Model Files >
           Sinusoidal Source Model               


Sinusoidal Source Model

Here is a model of a sinusoidal source, sin.m. This SOURCE type model has no inputs and one output.

The model name, sin, matches the Matlab function name.

% NEXSYS FUNCTIONAL_MODEL ("sin", "0","", "", "1","r", "1","NO_DATA_REQ", "NOT_APPLICABLE", "NSAMP=256,SAMPLE_RATE=102.4e6,AMPLITUDE=1,FOSC=10e6,PHASE=0" )

Here are explanations for the entries in this line:

 


“dclock”

Model name and function name

“0”

No inputs

“”

No input type

“”

No samples needed per invocation

“1”

One output

“r”

Output is real

“NSAMP”

“NSAMP” sample to be generated per invocation (all samples are sent to the output port at once)

“NO_DATA_REQ”

No extra data reference is required

“NOT_APPLICABLE”

No probe domain

" NSAMP=256, SAMPLE_RATE=102.4e6, AMPLITUDE=1, FOSC=10e6, PHASE=0"

Parameters for the model

Here is the Matlab sin function definition.

function [ output, SV ] = sin (parameters, SV, status_in)

The input and output variables for the function are:


parameters

Parameter values of the model

SV

State variable (in)

status_in

Input status

output

Output signal

SV

State variable (out)

Get parameters.

% Get parameters from function argument p

samples = parameters(1);

sample_rate = parameters(2);

amplitude = parameters(3);

fosc = parameters(4);

phase = parameters(5)*pi/180;

Calculate and set output and return:

time = (0:samples-1)/sample_rate;

output = amplitude*cos(2*pi*fosc*time + phase);

return

The sinusoidal source does not require any state variables (SV) to be saved or retrieved.



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