MATLAB: For a control system model having an inner loop and an outer loop. How to simulate this model when inner loop has higher sampling rate than outer loop

control system modelfaster inner loop

For a control system model having an inner loop and an outer loop. How to simulate this model when inner loop has higher sampling rate than outer loop?

Best Answer

Use "Rate transition" blocks for transfer of data between your inner loop and outer loop. For the data going into outerloop from inner loop set the rate transition block output rate as that of your outer loop and vice versa. Should work perfectly as I have worked on similar flight control system models. Get back in case you get stuck somewhere.

See here for details on rate transition blocks.

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MATLAB: Concatenating an output matrix within inner and outer loops

Hi,

In case you only want to break the inner for loop, you can try it this way

output=[];
k = 1;
for z = 1:10;
  in1 = input1(k);
  in2 = input2(k);
  v=1; 
  for t = 0:0.1:5;  % length of vector t can be varied so allow limit to be

    % met in each inner loop

    % calculations using in1 and in2 from outer loop

    var1(v,k) = a;
    var2(v,k) = b;
    out = [a b];
    limit = norm(out - in1);
    if limit < a 
        break;
    end
    output = [output; out]; % appending data to output matrix

    v=v+1;
  end
  z=z+1
end

In case you want to break both the inner and outer for loops, you can try it this way

output=[];
k = 1;
flag=0;
for z = 1:10;
  in1 = input1(k);
  in2 = input2(k);
  v=1;
  for t = 0:0.1:5;  % length of vector t can be varied so allow limit to be
    % met in each inner loop
    % calculations using in1 and in2 from outer loop
    var1(v,k) = a;
    var2(v,k) = b;
    out = [a b];
    limit = norm(out - in1);
    if limit < a 
        flag=1;
        break; % to break inner loop
    end
    output = [output; out]; % appending data to output matrix
    v=v+1;
  end
  if flag
      break; to break outer loop
  end
  z=z+1
end

You need not increment z after inner for loop since it gets incremented by 1 in the outer for loop every time it runs. In case you want z to increment by n (number other than 1), you can write it as ‘for z=1:n:10’

MATLAB: Is there an example of how to use nested bus objects in Simulink

Please refer the following help documentation on how to create Nested buses:

 <http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/bq4icqm-1.html#bq4t8ug-1>

You may also look at the demo example by typing 'busdemo' on MATLAB Command Prompt.

Best Answer

Related Solutions

MATLAB: Concatenating an output matrix within inner and outer loops

MATLAB: Is there an example of how to use nested bus objects in Simulink

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