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Homework Help: Contrust a graph using Comsol Script.

  1. Dec 24, 2008 #1
    1. The problem statement, all variables and given/known data
    Construct a simulink model of the extended system that fully represents it. Hint: If KST tends towards infinity the new model should be the same as the old provided the mass of the car body is unchanged.

    M = 1200;
    KST = 15000000;
    MH = 60;
    Kv = 3.2e+004


    2. Relevant equations
    If u need the diagram of the soultion kindly pm me with ur email. i email to u.



    3. The attempt at a solution

    A = [0 1 0 0 ; (-Ks+KST)/MH -Kv/MH -Ks/MH Kv/MH; 0 0 0 1; Ks/M Kv/M -Ks/M -Kv/M];
    B= [0 0; KST/MH -1/MH; 0 0; 0 1/M];
    C = [1 0 0 0; 0 0 1 0; 0 1 0 0; 0 0 0 1];
    D = [0 0; 0 0; 0 0; 0 0];
    Ss1 = ss(A, B, C, D);
    T = [0:0.01:10]';
    S1 = zeros(size(T));
    S2 = 3000*ones(size(T));
    U1 = sig(S1, T);
    U2 = sig(S2, T);
    simulate(Ss1,(U1, U2))


    The problem is, i couldn;t get the graph of it. I tried using matlab and comsol script. Looks like theres an snytax error. Please help.
     
  2. jcsd
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