MATLAB: How to validly change a value with unit C to a value with unit K in simulink 2019a

MATLABpower_amplifiersimulinkthermal conductancethermal conductivity

In the one simulation, the error arises that

"Invalid attempt to convert a value with unit C to a value with unit K."

In the simulation, an enviromental parameter, circuit temperature with 17C is feeded between a linear resistor and a upconverter. When I want to run this simulation, this error is happened in this environment parameter generation. Is there any appraoch to change a value with unit C(thermal conductance) to a value with unit K(thermal conductivity) in simulink?

Many Thanks.

Best Answer

Use the Unit Conversion Block

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MATLAB: Mysterious “Operands to the || and && operators must be convertible to logical scalar values.” error

One thing you can try is to see if any of the constraints or parts of the function are evaluating to Inf or NaN

There might also be an error message that popus up in psAugConverged:

% fmincon enocntered NaN or Inf and could not continue; error here

if ~isempty(infMessage) && strmatch('optimlib:optimfcnchk',infMessage)

error(message('globaloptim:psAugConverged:NaNFval'));

MATLAB: Inputting Units

That's not user friendly. It would be very annoying to your users and I recommend you DON'T DO THAT, especially since it's not necessary at all. Just convert what they input to upper case with the upper() function, like this:

% Set up the dialog box parameters
prompt = {'Enter temperature:','Enter the temperature scale:'};
dialogTitle = 'Enter parameters';
numberOfLines = 1;
defaultAnswers = {'100','C'};
userResponse = inputdlg(prompt, dialogTitle, numberOfLines, defaultAnswers);
% Extract out individual variables from the user response.
temperature = str2double(userResponse{1})
% Convert to upper case.
EoSI = upper(userResponse{2})

Best Answer

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MATLAB: Mysterious “Operands to the || and && operators must be convertible to logical scalar values.” error

MATLAB: Inputting Units

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