Trouble while generating a 3D custom component in Simscape Environment.

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MIHIR GAGLANI 2021-8-30

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评论： MIHIR GAGLANI 2021-9-3

I'm facing issues while trying to generate my custom simscape component

The declarations, parameters, nodes definitions etc as a prerequisites required are correctly fulfilled.
I'm trying to make a 3D custom simscape component and hence using a tablelookup in one of muy equations.
The data set of input values are defined using the Link provided by Mathworks.
The input vectors are defined as provided in the figure below. I'm also providing the array and its sizes.
The equation for fd i.e. output function is as provided below
While running <ssc_build('MyComponent')> I'm getting the error as shown below

What is that I've done incorrectly and where I need to make changes in order to make the Simscape model generate MyComponent effectively

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Answer 1

Joel Van Sickel 2021-9-3

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编辑：Joel Van Sickel 2021-9-3

Hello Mihir,

I wonder if your problem lies in how you are declaring/setting SOC, T, or Cycle. I copied your text to make a test part and everything else seems to work: You should probably share your entire part definition when looking for help.

component testPart
    
    nodes
        p = foundation.electrical.electrical; % +:left
        n = foundation.electrical.electrical; % -:right
    end
          
    parameters (Size=variable)
        R_LUT = {ones(5,3,9),'Ohm'};
        SOC_LUT = {[0 0.1 0.5 0.9 1], '1'};
        Temp_LUT = {[273.15 298.13 313.13],'K'};
        Cycle_LUT = {[1 50 100 150 200 250 300 350 400],'1'};
    end
    
    equations
        R == tablelookup(SOC_LUT,Temp_LUT,Cycle_LUT,R_LUT,{0.1,'1'},{273.15,'K'},{50,'1'},...
            interpolation=linear,extrapolation=nearest);
        v == i*R;
    end
    
    variables
        i = { 0, 'A' }; % Current
        v = { 0, 'V' }; % Voltage
        R = { 1, 'Ohm'}; % Resistance
    end
    branches
        i : p.i -> n.i;
    end       
    
end

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MIHIR GAGLANI 2021-9-3

Hi Joel Van Sickel,

As you mentioned the ssc files doesn't had such of an issue. This is when I commented some of the lines in the matlab script. Can you explain the impact of the commented part that caused the ssc_build function to not build a custom model. The script is as follows

component Resistance_LUT
    nodes
        p    = foundation.electrical.electrical;                           % +:left
        n    = foundation.electrical.electrical;                           % -:right
    end
    inputs
        T    = {293.15,'K'};                                               % T:left
        SOC  = {1,'1'};                                                    % SOC:left
        Cycle= {1,'1'};                                                    % Cycle No:left
    end
    outputs
        pow = {0,'W'};                                                     % POW:right
    end
    parameters (Size=variable)
        R_LUT = {1e-3*ones(5,9,3),'Ohm'};                                  % R_table (SoC,T,Cycle.No)
        SOC_LUT = {[0 0.1 0.5 0.9 1],'1'};                                 % SoC
        Cycle_LUT ={[1 50 100 150 200 250 300 350 400],'1'};               % Cycle.No
        Temp_LUT = {[273.15 298.13 313.13],'K'};                           % T
    end
    variables(Access=private)
        i = { 0, 'A' }; % Current
        v = { 0, 'V' }; % Voltage
    end
%     function setup %#simple
%         % Check parameter values
%         if any(any(value(R_LUT,'Ohm')<=0))
%             pm_error('simscape:GreaterThanZero','Matrix of resistance values, R(SOC,T)');
%         end
%         if any(value(SOC_LUT,'1')<0)
%             pm_error('simscape:GreaterThanOrEqualToZero','State of charge (SOC) breakpoints');
%         end
%         if any(value(Temp_LUT,'K')<0)
%             pm_error('simscape:GreaterThanOrEqualToZero','Temperature (T) breakpoints');
%         end
%         if any(value(Cycle_LUT,'1')<0)
%             pm_error('simscape:GreaterThanOrEqualToZero','Cycle (No) breakpoints');
%         end
%     end
    branches
        i : p.i -> n.i;
    end
    equations
        v == p.v - n.v;
        let
            % Perform the table lookup
            R = tablelookup(SOC_LUT,Cycle_LUT,Temp_LUT,R_LUT,SOC,Cycle,T,...
                interpolation=linear,extrapolation=nearest)
        in
            % Electrical Equations
            v == i*R;
            pow == v*i;
        end
    end
end

Joel Van Sickel 2021-9-3

you need a third any() function for your Resistance lookup table

MIHIR GAGLANI 2021-9-3

Thanks for the answer. Highly grateful for your response sir.

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Trouble while generating a 3D custom component in Simscape Environment.

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