while loop in simscape language

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Tomas Iesmantas
Tomas Iesmantas 2011-6-7
回答： Vishnu Teja Vithala 2018-7-9
Hi, I'm having some troubles in creating ssc file where I need to use while loop (or maybe for). Here is my code:
parameters
gain = { [0 0 1/3], '1' }; % Gain
max={[0.3 0.1 0.25],'1'} %Maximum pressures
end
parameters
stop = { 0, '1' };
k={1,'1'};
end
equations
while stop<1
if I<=sum(max(1:k))
stop=1;
coef=gain(k);
end
k=k+1;
end
O == coef * I;
end
And when I try to build library with ssc_build I get message like this:
Illegal flow control construct 'while' in equation block
Am I doing something wrong, or there is no possibility in simscape language to use "while" and "for" statements (although conditional "if" is allowed)?
Thanks in advance.

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采纳的回答

Arnaud Miege
Arnaud Miege 2011-6-7
while and for loops are not allowed in the Simscape language, see the equations documentation ("Supported Functions" section) and Defining Component Equations in the Simscape documentation. What are you trying to do?
Arnaud
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Arnaud Miege
Arnaud Miege 2011-6-8
I would suggest doing this in Simulink/Stateflow or Embedded MATLAB and using a Simulink->PS Converter block to feed to the flow rate sources. Alternatively, if you want to stay within the Simscape environment, you could probably use the PS Switch block in conjunction with the PS Max and PS Min blocks.
Andreas
Andreas 2015-11-6
Hi Arnaud,
while and for would be helpful, to create parameter-driven discretisations of simscape-blocks (like in Modelica language) for any type of lumped models.

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更多回答（1 个）

Vishnu Teja Vithala
I agree, Simscape not supporting while and for loops is pretty big limitation

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