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30 lines
958 B
Plaintext
30 lines
958 B
Plaintext
within ModelicaByExample.PackageExamples;
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model SecondOrderSystem
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"A second order rotational system importing types from Modelica Standard Library"
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import Modelica.SIunits.*;
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parameter Angle phi1_init = 0;
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parameter Angle phi2_init = 1;
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parameter AngularVelocity omega1_init = 0;
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parameter AngularVelocity omega2_init = 0;
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parameter Inertia J1=0.4;
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parameter Inertia J2=1.0;
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parameter RotationalSpringConstant k1=11;
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parameter RotationalSpringConstant k2=5;
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parameter RotationalDampingConstant d1=0.2;
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parameter RotationalDampingConstant d2=1.0;
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Angle phi1;
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Angle phi2;
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AngularVelocity omega1;
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AngularVelocity omega2;
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initial equation
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phi1 = phi1_init;
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phi2 = phi2_init;
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omega1 = omega1_init;
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omega2 = omega2_init;
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equation
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omega1 = der(phi1);
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omega2 = der(phi2);
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J1*der(omega1) = k1*(phi2-phi1)+d1*der(phi2-phi1);
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J2*der(omega2) = k1*(phi1-phi2)+d1*der(phi1-phi2)-k2*phi2-d2*der(phi2);
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end SecondOrderSystem;
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