diff --git a/FDTD/operator.cpp b/FDTD/operator.cpp index f7b5588..a3fb64a 100644 --- a/FDTD/operator.cpp +++ b/FDTD/operator.cpp @@ -92,7 +92,8 @@ unsigned int Operator::GetNyquistNum(double fmax) { if (dT==0) return 1; double T0 = 1/fmax; - return floor(T0/2/dT); + m_nyquistTS = floor(T0/2/dT); + return m_nyquistTS; } bool Operator::SnapToMesh(double* dcoord, unsigned int* uicoord, bool lower) @@ -207,29 +208,35 @@ struct Operator::Grid_Path Operator::FindPath(double start[], double stop[]) double Operator::GetNumberCells() { if (numLines) - return (numLines[0]-1)*(numLines[1]-1)*(numLines[2]-1); + return (numLines[0])*(numLines[1])*(numLines[2]); //it's more like number of nodes??? return 0; } -void Operator::ShowSize() +void Operator::ShowStat() { unsigned int OpSize = 12*numLines[0]*numLines[1]*numLines[2]*sizeof(FDTD_FLOAT); unsigned int FieldSize = 6*numLines[0]*numLines[1]*numLines[2]*sizeof(FDTD_FLOAT); double MBdiff = 1024*1024; - cout << "---- Stat: FDTD Operator ----" << endl; - cout << "Dimensions : " << numLines[0] << "x" << numLines[1] << "x" << numLines[2] << " = " << numLines[0]*numLines[1]*numLines[2] << " Cells (" << numLines[0]*numLines[1]*numLines[2]/1e6 << " MCells)" << endl; - cout << "Size of Operator : " << OpSize << " Byte (" << (double)OpSize/MBdiff << " MB) " << endl; - cout << "Size of Field-Data: " << FieldSize << " Byte (" << (double)FieldSize/MBdiff << " MB) " << endl; - cout << "-----------------------------" << endl; + cout << "------- Stat: FDTD Operator -------" << endl; + cout << "Dimensions : " << numLines[0] << "x" << numLines[1] << "x" << numLines[2] << " = " << numLines[0]*numLines[1]*numLines[2] << " Cells (" << numLines[0]*numLines[1]*numLines[2]/1e6 << " MCells)" << endl; + cout << "Size of Operator : " << OpSize << " Byte (" << (double)OpSize/MBdiff << " MB) " << endl; + cout << "Size of Field-Data : " << FieldSize << " Byte (" << (double)FieldSize/MBdiff << " MB) " << endl; + cout << "-----------------------------------" << endl; + cout << "Timestep (s) : " << dT << endl; + cout << "Nyquist criteria (TS) : " << m_nyquistTS << endl; + cout << "Nyquist criteria (s) : " << m_nyquistTS*dT << endl; + cout << "Excitation Length (TS) : " << ExciteLength << endl; + cout << "Excitation Length (s) : " << ExciteLength*dT << endl; + cout << "-----------------------------------" << endl; } -bool Operator::CalcGaussianPulsExcitation(double f0, double fc) +unsigned int Operator::CalcGaussianPulsExcitation(double f0, double fc) { - if (dT==0) return false; + if (dT==0) return 0; ExciteLength = (unsigned int)(2.0 * 9.0/(2.0*PI*fc) / dT); - cerr << "Operator::CalcGaussianPulsExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl; +// cerr << "Operator::CalcGaussianPulsExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl; delete[] ExciteSignal; ExciteSignal = new FDTD_FLOAT[ExciteLength+1]; ExciteSignal[0]=0.0; @@ -238,16 +245,16 @@ bool Operator::CalcGaussianPulsExcitation(double f0, double fc) ExciteSignal[n] = cos(2.0*PI*f0*(n*dT-9.0/(2.0*PI*fc)))*exp(-1*pow(2.0*PI*fc*n*dT/3.0-3,2)); // cerr << ExciteSignal[n] << endl; } - return true; + return GetNyquistNum(f0+fc); } -bool Operator::CalcSinusExcitation(double f0, int nTS) +unsigned int Operator::CalcSinusExcitation(double f0, int nTS) { - if (dT==0) return false; - if (nTS<=0) return false; + if (dT==0) return 0; + if (nTS<=0) return 0; ExciteLength = (unsigned int)(nTS); - cerr << "Operator::CalcSinusExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl; +// cerr << "Operator::CalcSinusExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl; delete[] ExciteSignal; ExciteSignal = new FDTD_FLOAT[ExciteLength+1]; ExciteSignal[0]=0.0; @@ -256,7 +263,7 @@ bool Operator::CalcSinusExcitation(double f0, int nTS) ExciteSignal[n] = sin(2.0*PI*f0*n*dT); // cerr << ExciteSignal[n] << endl; } - return true; + return GetNyquistNum(f0); } void Operator::DumpOperator2File(string filename) @@ -719,7 +726,7 @@ double Operator::CalcTimestep() } } } - cerr << "Operator Timestep: " << dT << endl; +// cerr << "Operator Timestep: " << dT << endl; return 0; } diff --git a/FDTD/operator.h b/FDTD/operator.h index cc25e6e..12ed41a 100644 --- a/FDTD/operator.h +++ b/FDTD/operator.h @@ -37,10 +37,10 @@ public: virtual int CalcECOperator(); - //! Calculate an excitation with center of f0 and the half bandwidth fc - virtual bool CalcGaussianPulsExcitation(double f0, double fc); - //! Calculate a sinusoidal excitation with frequency f0 and a duration of nTS number of timesteps - virtual bool CalcSinusExcitation(double f0, int nTS); + //! Calculate an excitation with center of f0 and the half bandwidth fc \return number of Nyquist timesteps + virtual unsigned int CalcGaussianPulsExcitation(double f0, double fc); + //! Calculate a sinusoidal excitation with frequency f0 and a duration of nTS number of timesteps \return number of Nyquist timesteps + virtual unsigned int CalcSinusExcitation(double f0, int nTS); virtual void ApplyElectricBC(bool* dirs); //applied by default to all boundaries virtual void ApplyMagneticBC(bool* dirs); @@ -49,7 +49,7 @@ public: unsigned int GetNyquistNum(double fmax); double GetNumberCells(); - void ShowSize(); + void ShowStat(); void DumpOperator2File(string filename); void DumpMaterial2File(string filename); @@ -86,6 +86,7 @@ protected: //Calc timestep only internal use virtual double CalcTimestep(); double dT; //FDTD timestep! + unsigned int m_nyquistTS; //EC elements, internal only! bool Calc_EC(); diff --git a/matlab/ReadUI.m b/matlab/ReadUI.m new file mode 100644 index 0000000..c4d94b1 --- /dev/null +++ b/matlab/ReadUI.m @@ -0,0 +1,28 @@ +function UI = ReadUI(files, path) + +if (nargin<2) + path =''; +end + +if (ischar(files)) + filenames{1}=files; +else + filenames=files; +end + +for n=1:numel(filenames) + tmp = load([path filenames{n}]); + t = tmp(:,1)'; + val = tmp(:,2)'; + + UI.TD{n}.t = t; + UI.TD{n}.val = val; + + dt=t(2)-t(1); + val = [val zeros(1,5000)]; + L=numel(val); + UI.FD{n}.f = (0:L-1)/L/dt; + UI.FD{n}.f = UI.FD{n}.f(1:floor(L/2)); + UI.FD{n}.val = fft(val)/L; + UI.FD{n}.val = UI.FD{n}.val(1:floor(L/2)); +end \ No newline at end of file diff --git a/matlab/examples/Helix.m b/matlab/examples/Helix.m index c9d1ec6..90f0dd1 100644 --- a/matlab/examples/Helix.m +++ b/matlab/examples/Helix.m @@ -8,14 +8,18 @@ coil_rad = 10; coil_length = 50; coil_turns = 8; coil_res = 10; -port_length = 10; +port_length = coil_length/2; port_resist = 50; +f_max = 50e6; +f_excite = 1e9; +mesh_size = wire_rad; openEMS_Path = [pwd() '/../../'] openEMS_opts = ''; % openEMS_opts = [openEMS_opts ' --disable-dumps']; % openEMS_opts = [openEMS_opts ' --debug-material']; +% openEMS_opts = [openEMS_opts ' --debug-operator']; Sim_Path = 'tmp'; Sim_CSX = 'helix.xml'; @@ -24,15 +28,21 @@ mkdir(Sim_Path); %setup FDTD parameter FDTD = InitFDTD(5e5,1e-6); -FDTD = SetGaussExcite(FDTD,0.5e9,0.5e9); +FDTD = SetGaussExcite(FDTD,f_excite/2,f_excite/2); BC = [1 1 1 1 1 1]; FDTD = SetBoundaryCond(FDTD,BC); +add_Lines = mesh_size * 1.5.^(1:10); +add_Lines = add_Lines(find(add_Lines<(3e8/f_excite)/10*1e3)); + %setup CSXCAD geometry CSX = InitCSX(); -mesh.x = [-35,-25,-20,-15,-12,-11,-10.5,-10,-9.5,-9,-8.5,-8,-7.5,-7,-6.5,-6,-5.5,-5,-4.5,-4,-3.5,-3,-2.5,-2,-1.5,-1,-0.5,0,0.5,1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,12,13.5,15,17,18,19,19.5,20,20.5,21,22,23,25,27.5,30,35,45]; -mesh.y = [-35,-25,-20,-15,-12,-11,-10.5,-10,-9.5,-9,-8.5,-8,-7.5,-7,-6.5,-6,-5.5,-5,-4.5,-4,-3.5,-3,-2.5,-2,-1.5,-1,-0.5,0,0.5,1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,12,13,15,17.5,20,25,35]; -mesh.z = [-25,-15,-10,-5,-2,-1,-0.5,0,0.5,1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,11.5,12,12.5,13,13.5,14,14.5,15,15.5,16,16.5,17,17.5,18,18.5,19,19.5,20,20.5,21,21.5,22,22.5,23,23.5,24,24.5,25,25.5,26,26.5,27,27.5,28,28.5,29,29.5,30,30.5,31,31.5,32,32.5,33,33.5,34,34.5,35,35.5,36,36.5,37,37.5,38,38.5,39,39.5,40,40.5,41,41.5,42,42.5,43,43.5,44,44.5,45,45.5,46,46.5,47,47.5,48,48.5,49,49.5,50,50.5,51,52,53,55,57.5,60,65,75]; +mesh.x = -coil_rad-mesh_size : mesh_size : coil_rad+mesh_size+feed_length; +mesh.x = [mesh.x(1)-add_Lines mesh.x mesh.x(end)+add_Lines ]; +mesh.y = -coil_rad-mesh_size : mesh_size : coil_rad+mesh_size; +mesh.y = [mesh.y(1)-add_Lines mesh.y mesh.y(end)+add_Lines ]; +mesh.z = -mesh_size : mesh_size : coil_length+mesh_size; +mesh.z = [mesh.z(1)-add_Lines mesh.z mesh.z(end)+add_Lines ]; CSX = DefineRectGrid(CSX, 1e-3,mesh); %create copper helix and feed lines... @@ -43,7 +53,13 @@ CSX = SetMaterialProperty(CSX,'copper','Kappa',56e6); dt = 1.0/coil_res; height=0; wire.Vertex = {}; -count=0; +p(1,1) = coil_rad + feed_length; +p(2,1) = 0; +p(3,1) = 0.5*(coil_length-port_length); +p(1,2) = coil_rad + feed_length; +p(2,2) = 0; +p(3,2) = 0; +count=2; for n=0:coil_turns-1 for m=0:coil_res count = count + 1; @@ -53,22 +69,21 @@ for n=0:coil_turns-1 end height = height + coil_length/coil_turns; end +p(1,count+1) = coil_rad + feed_length; +p(2,count+1) = 0; +p(3,count+1) = coil_length; +p(1,count+2) = coil_rad + feed_length; +p(2,count+2) = 0; +p(3,count+2) = 0.5*(coil_length+port_length); CSX = AddWire(CSX, 'copper', 0, p, wire_rad); -start = [coil_rad, 0 , 0];stop = [coil_rad+feed_length, 0 , 0]; -CSX = AddCylinder(CSX,'copper',0 ,start,stop,wire_rad); - -start(3)=coil_length;stop(3)=coil_length; -CSX = AddCylinder(CSX,'copper',0 ,start,stop,wire_rad); - -start(3)=0;start(1)=coil_rad+feed_length; -CSX = AddCylinder(CSX,'copper',0 ,start,stop,wire_rad); - CSX = AddMaterial(CSX,'resist'); -kappa = port_length/port_resist/wire_rad^2/pi/1e-3 +kappa = port_length/port_resist/wire_rad^2/pi/1e-3; CSX = SetMaterialProperty(CSX,'resist','Kappa',kappa); -start(3)=(coil_length-port_length)/2;stop(3)=(coil_length+port_length)/2; +start=[coil_rad+feed_length 0 (coil_length-port_length)/2]; +stop=[coil_rad+feed_length 0 (coil_length+port_length)/2]; +%start(3)=(coil_length-port_length)/2;stop(3)=(coil_length+port_length)/2; CSX = AddCylinder(CSX,'resist',5 ,start,stop,wire_rad); %excitation @@ -77,7 +92,7 @@ CSX = AddCylinder(CSX,'excite', 0 ,start,stop,wire_rad); %voltage calc CSX = AddProbe(CSX,'ut1',0); -CSX = AddBox(CSX,'ut1', 0 ,start,stop); +CSX = AddBox(CSX,'ut1', 0 ,stop,start); %current calc CSX = AddProbe(CSX,'it1',1); @@ -86,6 +101,17 @@ start(1) = start(1)-2;start(2) = start(2)-2; stop(1) = stop(1)+2;stop(2) = stop(2)+2; CSX = AddBox(CSX,'it1', 0 ,start,stop); +%dump +CSX = AddDump(CSX,'Et_',0,0); +start = [mesh.x(1) , 0 , mesh.z(1)]; +stop = [mesh.x(end) , 0 , mesh.z(end)]; +CSX = AddBox(CSX,'Et_',0 , start,stop); + +CSX = AddDump(CSX,'Ht_',1,0); +start = [mesh.x(1) , 0 , mesh.z(1)]; +stop = [mesh.x(end) , 0 , mesh.z(end)]; +CSX = AddBox(CSX,'Ht_',0 , start,stop); + %Write openEMS compatoble xml-file WriteOpenEMS([Sim_Path '/' Sim_CSX],FDTD,CSX); @@ -97,3 +123,26 @@ disp(command); system(command) cd(savePath); +%%%post-proc +U = ReadUI('ut1','tmp/'); +I = ReadUI('it1','tmp/'); + +Z = U.FD{1}.val./I.FD{1}.val; +f = U.FD{1}.f; +L = imag(Z)./(f*2*pi); +R = real(Z); +ind = find(fSetGeometryCSX(&CSX)==false) return(-1); FDTD_Op->CalcECOperator(); - + unsigned int Nyquist = 0; if (Excit_Type==0) { - if (!FDTD_Op->CalcGaussianPulsExcitation(f0,fc)) + Nyquist = FDTD_Op->CalcGaussianPulsExcitation(f0,fc); + if (!Nyquist) { cerr << "openEMS: excitation setup failed!!" << endl; exit(2); @@ -209,7 +210,8 @@ int openEMS::SetupFDTD(const char* file) } else if (Excit_Type==1) { - if (!FDTD_Op->CalcSinusExcitation(f0,NrTS)) + Nyquist = FDTD_Op->CalcSinusExcitation(f0,NrTS); + if (!Nyquist) { cerr << "openEMS: excitation setup failed!!" << endl; exit(2); @@ -232,13 +234,10 @@ int openEMS::SetupFDTD(const char* file) time_t OpDoneTime=time(NULL); - FDTD_Op->ShowSize(); + FDTD_Op->ShowStat(); FDTD_Op->ApplyMagneticBC(PMC); - cout << "Nyquist number of timesteps: " << FDTD_Op->GetNyquistNum(f0+fc) << endl; - unsigned int Nyquist = FDTD_Op->GetNyquistNum(f0+fc); - cout << "Creation time for operator: " << difftime(OpDoneTime,startTime) << " s" << endl; //create FDTD engine @@ -331,7 +330,7 @@ int openEMS::SetupFDTD(const char* file) void openEMS::RunFDTD() { - cout << "Running FDTD engine... this may take a while... grab a coup of coffee?!?" << endl; + cout << "Running FDTD engine... this may take a while... grab a cup of coffee?!?" << endl; ProcessFields ProcField(FDTD_Op,FDTD_Eng); double maxE=0,currE=0;