real time clock in Simulink
Daniel Czarkowski
Is there any real time clock in the Simulink? I would like to stop my
simulation after a certain amount of time, e.g. 10 seconds. How to do it?
best regards,
daniel
Stuart McGarrity
"Daniel Czarkowski" <reut...@poczta.onet.pl> wrote in message
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Daniel Czarkowski
"Stuart McGarrity" <stu...@mathworks.com> wrote in message
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>
http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=3175&objectType=file
Thank you Stuart. The point is that I am looking for something different. In
this Simulink library, the time of simulation equals to real time. I would
like to measure how long the simulation takes in real time. I now that I can
do it in MATLAB
tic
sim('my_model',[0 10],opt)
toc
I am using GA for optimisation and sometimes the simulations in real time
takes to long, so I would like to stop it after e.g. 60 seconds. I found
STOP simulation block, but did not find the real time simulation clock. I
presume that I would have to write an s-function and include (toc). What I
need is just sth like tic and toc function in the Simulink. Anyone came
across with the problem?
Any ideas?
best regards,
daniel
Stuart McGarrity
with the 'now' command. Set it to execute infrequently.
Stuart
"Daniel Czarkowski" <reute...@SPAMpoczta.onet.pl> wrote in message
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Kelvin Hales
Might there be something in the Humusoft Extended Real-Time Toolbox for MATLAB and
Simulink that could help you? <http://www.humusoft.cz/rt>
Kelvin B. Hales
Kelvin Hales Associates Limited
Consulting Control Engineers
E-mail: kha...@khace.com
Web: www.khace.com
Daniel Czarkowski
> One way would be to write an M code S-function that outputs the current
time
> with the 'now' command. Set it to execute infrequently.
It means that this command is not a part of MATLAB/Simulink. I hope in R14
Mathworks will implement that as well.
If someone done it, please send it to
http://www.mathworks.co.uk/matlabcentral/fileexchange/
best regards
daniel
Daniel Czarkowski
MATLAB and
> Simulink that could help you? <http://www.humusoft.cz/rt>
thank you
daniel
Steve Amphlett
One way to limit a simulation's elapsed (wall) time is to:
1) Set up a "Simulation Start Function" callback: t0=clock;
2) Add a MATLAB Fcn block with the function: etime(clock,t0). Ground
the input. The output from this block is now the elapsed time that
the simulation has been running for.
3) Add a relational operator block to compare elapsed time with some
constant (your time limit).
4) Feed the output of the relational operator into a Stop block.
When elapsed time is greater than your limit, the model stops.
If this isn't clear, I can email you my example (for R13).
HTH
- Steve
Kelvin Hales
To stop your simulation after x-seconds of real time: synchronise the
simulation time with real time and take the output from a Clock block to a
Stop block.
Daniel Czarkowski
daniel
Steve Amphlett
>
>
> Thank you very much Steve!
>
> daniel
I think your use of the expression "real time" got most posters into
the wrong mindset (RTW, HiL etc). What you really meant (pardon me
for correcting your English) was "wall time" or "elapsed time".
Reza
This does not work for me. I am using R2011. I run a "Simulation Start script" calling back: t0=clock; and when I run my simulink file, it would only calculate the elapsed time at the beginning of the simulation and it would be constant through the whole simulation.
I am using SimMechanics too.
Any help would be appreciated.
Thanks,
-Reza
"Steve Amphlett" <Firstname.Lastname@where_I_work.com> wrote in message <eed1...@webx.raydaftYaTP>...
Pramit Biswas
padmai....@gmail.com
I am a novice M/S user. I just tried to take the output from a block to a stop block, but how do I synchronize simulation time with real time before doing this?
Cheers
Padma