How to load a two-dimensional array using 'From File ' block in Simulink
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I am trying to load 2x180 matrix using 'From File ' block and then display it with 'Scope' block in Simulink
the first row of the matrix includes time values [-5.0002 :0.0002: -4.9644 ] and second row includes corresponding amplitude values.
I saved the 'signal_5' (in the attachment) as 7.3 MAT-file format.I arranged the matrix to comply with the following link:
how should I set 'Sample Time' and Simulation Stop time? or any other parameters
Although I tried to do it, I could not display amplitude plot.
4 个评论
stozaki
2020-1-20
Why is the simulation start time -5.0002? Is there any reason that is not 0?
ser
2020-1-20
ser
2020-1-24
Thanks your suggenstion.
Waveform differences are the effect of sampling. The time interval of the data stored in the .mat file is 0.002. In Simulink, the sample rate is 0.002. This seems reasonable when simulating discrete systems.
However, when simulating a continuous system with Simulink, the solver needs to be changed. I attached an example.
When simulating with Simulink, please set an appropriate solver type of configuration set.
This issue is independent of the tool version.
Regards,
stozaki
采纳的回答
stozaki
2020-1-20
Please download model and .mat file attached. (created by R2019b)
And execute following script.
model = 'signal_5model'; % define model name
open_system(model); % open model file
cs = getActiveConfigSet(model); % get active congiguration set from model
set_param(cs,'FixedStep','0.0002'); % set sample rate
sim(model,...
'StopTime','0.036'); % simulate until 0.036
The oscilloscope triggers while sweeping the data continuously. Therefore, I think that the data before and after the time to trigger is acquired.On the other hand, Simulink always starts simulation at time 0. Therefore,I modified the format of the data.
Regards,
stozaki
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