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testLoopsOverFMUs.mos
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testLoopsOverFMUs.mos
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// name: testLoopsOverFMUs.mos
// status: correct
// teardown_command: rm -rf loopsOverFMUs* temp/
//
// Test algeraic loops over FMUs A and B or C and D. Can't be solved by fixed-point-iteration
// Using KINSOL to solve loops.
loadModel(Modelica, {"3.2.3"});
loadString("
package loopsOverFMUs
model A
Real a, b, c;
Modelica.Blocks.Interfaces.RealOutput a_out;
Modelica.Blocks.Interfaces.RealOutput b_out;
Modelica.Blocks.Interfaces.RealInput c_in;
equation
c = c_in;
// Eq. 1 and 2 of loop
a + b + c=0;
2*a - 3*b + 2*c=9;
a_out = a;
b_out = b;
end A;
model B
Real a, b, c;
Modelica.Blocks.Interfaces.RealInput a_in;
Modelica.Blocks.Interfaces.RealInput b_in;
Modelica.Blocks.Interfaces.RealOutput c_out;
equation
a = a_in;
b = b_in;
// Equation 3 of loop
a*a + b*b + c*c=5;
c_out = c;
end B;
model C
Modelica.Blocks.Interfaces.RealInput x_in;
Modelica.Blocks.Interfaces.RealOutput x_out;
Real y(fixed=true, start=2);
parameter Real a = 2;
equation
der(y) = a*y;
x_out = 2*x_in-y;
end C;
model D
Modelica.Blocks.Interfaces.RealInput x_in;
Modelica.Blocks.Interfaces.RealOutput x_out;
equation
x_out = x_in;
end D;
end loopsOverFMUs;
"); getErrorString();
buildModelFMU(loopsOverFMUs.A, fmuType="me", fileNamePrefix="loopsOverFMUs.A");
buildModelFMU(loopsOverFMUs.B, fmuType="me", fileNamePrefix="loopsOverFMUs.B");
buildModelFMU(loopsOverFMUs.C, fmuType="me", fileNamePrefix="loopsOverFMUs.C");
buildModelFMU(loopsOverFMUs.D, fmuType="me", fileNamePrefix="loopsOverFMUs.D");
writeFile("loopsOverFMUs.lua","
oms_setTempDirectory(\"./temp/\")
oms_newModel(\"loopsOverFMUs\")
oms_addSystem(\"loopsOverFMUs.root\", oms_system_sc)
-- instantiate FMUs
oms_addSubModel(\"loopsOverFMUs.root.A\", \"loopsOverFMUs.A.fmu\")
oms_addSubModel(\"loopsOverFMUs.root.B\", \"loopsOverFMUs.B.fmu\")
oms_addSubModel(\"loopsOverFMUs.root.C\", \"loopsOverFMUs.C.fmu\")
oms_addSubModel(\"loopsOverFMUs.root.D\", \"loopsOverFMUs.D.fmu\")
-- connections: A <-> B
oms_addConnection(\"loopsOverFMUs.root.A.a_out\", \"loopsOverFMUs.root.B.a_in\")
oms_addConnection(\"loopsOverFMUs.root.A.b_out\", \"loopsOverFMUs.root.B.b_in\")
oms_addConnection(\"loopsOverFMUs.root.A.c_in\", \"loopsOverFMUs.root.B.c_out\")
-- connections: C <-> D
oms_addConnection(\"loopsOverFMUs.root.C.x_out\", \"loopsOverFMUs.root.D.x_in\")
oms_addConnection(\"loopsOverFMUs.root.C.x_in\", \"loopsOverFMUs.root.D.x_out\")
-- simulation settings
oms_setResultFile(\"loopsOverFMUs\", \"loopsOverFMUs.mat\")
oms_setStartTime(\"loopsOverFMUs\", 0)
oms_setStopTime(\"loopsOverFMUs\", 0.1)
oms_instantiate(\"loopsOverFMUs\")
oms_setReal(\"loopsOverFMUs.root.A.c_in\", 1.0)
oms_initialize(\"loopsOverFMUs\")
oms_simulate(\"loopsOverFMUs\")
oms_terminate(\"loopsOverFMUs\")
oms_delete(\"loopsOverFMUs\")
"); getErrorString();
system(getInstallationDirectoryPath() + "/bin/OMSimulator loopsOverFMUs.lua --algLoopSolver=kinsol --stripRoot=true --suppressPath=true --deleteTempFiles=true", "testLoopsOverFMUs_systemCall.log"); getErrorString();
readFile("testLoopsOverFMUs_systemCall.log");
// Possible solutions:
// a≈0.635425, b=-1.8, c≈1.16458 or a≈1.16458, b=-1.8, c≈0.635425
val(A.a_out, 0.1, "loopsOverFMUs.mat");
val(A.b_out, 0.1, "loopsOverFMUs.mat");
val(B.c_out, 0.1, "loopsOverFMUs.mat");
// x should be equal to y
val(C.y, 0, "loopsOverFMUs.mat");
val(C.y, 0.1, "loopsOverFMUs.mat");
val(D.x_out, 0, "loopsOverFMUs.mat");
val(D.x_out, 0.1, "loopsOverFMUs.mat");
// Result:
// true
// true
// ""
// "loopsOverFMUs.A.fmu"
// "loopsOverFMUs.B.fmu"
// "loopsOverFMUs.C.fmu"
// "loopsOverFMUs.D.fmu"
// true
// ""
// 0
// ""
// "info: Alg. loop (size 3/7)
// loopsOverFMUs.root.B
// loopsOverFMUs.root.A
// info: Alg. loop (size 2/4)
// loopsOverFMUs.root.D
// loopsOverFMUs.root.C
// info: maximum step size for 'loopsOverFMUs.root': 0.001000
// info: Result file: loopsOverFMUs.mat (bufferSize=1)
// info: Alg. loop (size 3/7)
// loopsOverFMUs.root.B
// loopsOverFMUs.root.A
// info: Alg. loop (size 2/4)
// loopsOverFMUs.root.D
// loopsOverFMUs.root.C
// info: Alg. loop (size 3/7)
// loopsOverFMUs.root.B
// loopsOverFMUs.root.A
// info: Alg. loop (size 2/4)
// loopsOverFMUs.root.D
// loopsOverFMUs.root.C
// info: Final Statistics for 'loopsOverFMUs.root':
// NumSteps = 101 NumRhsEvals = 102 NumLinSolvSetups = 7
// NumNonlinSolvIters = 101 NumNonlinSolvConvFails = 0 NumErrTestFails = 0
// "
// 0.6354248688935413
// -1.8
// 1.164575131106459
// 2.0
// 2.442813485479551
// 2.0
// 2.442813485479604
// endResult