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FDTD: fix excitation signal length calculation and handling 

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
pull/29/head
Thorsten Liebig 2017-02-11 18:17:54 +01:00
parent 29ecc4b6c5
commit ff6920f3a8
3 changed files with 33 additions and 38 deletions
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55
FDTD/excitation.cpp
View File

@ -137,7 +137,7 @@ unsigned int Excitation::GetMaxExcitationTimestep() const
{
FDTD_FLOAT maxAmp=0;
unsigned int maxStep=0;
for (unsigned int n=1; n<Length+1; ++n)
for (unsigned int n=0; n<Length; ++n)
{
if (fabs(Signal_volt[n])>maxAmp)
{
@ -152,7 +152,7 @@ void Excitation::CalcGaussianPulsExcitation(double f0, double fc, int nTS)
{
if (dT==0) return;
Length = (unsigned int)(2.0 * 9.0/(2.0*PI*fc) / dT);
Length = (unsigned int)ceil(2.0 * 9.0/(2.0*PI*fc) / dT);
if (Length>(unsigned int)nTS)
{
cerr << "Operator::CalcGaussianPulsExcitation: Requested excitation pusle would be " << Length << " timesteps or " << Length * dT << " s long. Cutting to max number of timesteps!" << endl;
@ -160,13 +160,11 @@ void Excitation::CalcGaussianPulsExcitation(double f0, double fc, int nTS)
}
delete[] Signal_volt;
delete[] Signal_curr;
Signal_volt = new FDTD_FLOAT[Length+1];
Signal_curr = new FDTD_FLOAT[Length+1];
Signal_volt[0]=0.0;
Signal_curr[0]=0.0;
for (unsigned int n=1; n<Length+1; ++n)
Signal_volt = new FDTD_FLOAT[Length];
Signal_curr = new FDTD_FLOAT[Length];
for (unsigned int n=0; n<Length; ++n)
{
double t = (n-1)*dT;
double t = n*dT;
Signal_volt[n] = cos(2.0*PI*f0*(t-9.0/(2.0*PI*fc)))*exp(-1*pow(2.0*PI*fc*t/3.0-3,2));
t += 0.5*dT;
Signal_curr[n] = cos(2.0*PI*f0*(t-9.0/(2.0*PI*fc)))*exp(-1*pow(2.0*PI*fc*t/3.0-3,2));
@ -182,12 +180,12 @@ void Excitation::CalcDiracPulsExcitation()
{
if (dT==0) return;
Length = 1;
Length = 2;
// cerr << "Operator::CalcDiracPulsExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl;
delete[] Signal_volt;
delete[] Signal_curr;
Signal_volt = new FDTD_FLOAT[Length+1];
Signal_curr = new FDTD_FLOAT[Length+1];
Signal_volt = new FDTD_FLOAT[Length];
Signal_curr = new FDTD_FLOAT[Length];
Signal_volt[0]=0.0;
Signal_volt[1]=1.0;
Signal_curr[0]=0.0;
@ -203,11 +201,11 @@ void Excitation::CalcStepExcitation()
{
if (dT==0) return;
Length = 1;
Length = 2;
delete[] Signal_volt;
delete[] Signal_curr;
Signal_volt = new FDTD_FLOAT[Length+1];
Signal_curr = new FDTD_FLOAT[Length+1];
Signal_volt = new FDTD_FLOAT[Length];
Signal_curr = new FDTD_FLOAT[Length];
Signal_volt[0]=1.0;
Signal_volt[1]=1.0;
Signal_curr[0]=1.0;
@ -228,10 +226,8 @@ void Excitation::CalcCustomExcitation(double f0, int nTS, string signal)
// cerr << "Operator::CalcSinusExcitation: Length of the excite signal: " << ExciteLength << " timesteps" << endl;
delete[] Signal_volt;
delete[] Signal_curr;
Signal_volt = new FDTD_FLOAT[Length+1];
Signal_curr = new FDTD_FLOAT[Length+1];
Signal_volt[0]=0.0;
Signal_curr[0]=0.0;
Signal_volt = new FDTD_FLOAT[Length];
Signal_curr = new FDTD_FLOAT[Length];
FunctionParser fParse;
fParse.AddConstant("pi", 3.14159265358979323846);
fParse.AddConstant("e", 2.71828182845904523536);
@ -242,9 +238,9 @@ void Excitation::CalcCustomExcitation(double f0, int nTS, string signal)
exit(1);
}
double vars[1];
for (unsigned int n=1; n<Length+1; ++n)
for (unsigned int n=0; n<Length; ++n)
{
vars[0] = (n-1)*dT;
vars[0] = n*dT;
Signal_volt[n] = fParse.Eval(vars);
vars[0] += 0.5*dT;
Signal_curr[n] = fParse.Eval(vars);
@ -260,17 +256,16 @@ void Excitation::CalcSinusExcitation(double f0, int nTS)
if (dT==0) return;
if (nTS<=0) return;
Length = (unsigned int)(2.0/f0/dT);
//cerr << "Operator::CalcSinusExcitation: Length of the excite signal: " << Length << " timesteps " << Length*dT << "s" << endl;
Length = (unsigned int)round(2.0/f0/dT);
delete[] Signal_volt;
delete[] Signal_curr;
Signal_volt = new FDTD_FLOAT[Length+1];
Signal_curr = new FDTD_FLOAT[Length+1];
Signal_volt = new FDTD_FLOAT[Length];
Signal_curr = new FDTD_FLOAT[Length];
Signal_volt[0]=0.0;
Signal_curr[0]=0.0;
for (unsigned int n=1; n<Length+1; ++n)
for (unsigned int n=1; n<Length; ++n)
{
double t = (n-1)*dT;
double t = n*dT;
Signal_volt[n] = sin(2.0*PI*f0*t);
t += 0.5*dT;
Signal_curr[n] = sin(2.0*PI*f0*t);
@ -286,8 +281,8 @@ void Excitation::DumpVoltageExcite(string filename)
file.open( filename.c_str() );
if (file.fail())
return;
for (unsigned int n=1; n<Length+1; ++n)
file << (n-1)*dT << "\t" << Signal_volt[n] << "\n";
for (unsigned int n=0; n<Length; ++n)
file << n*dT << "\t" << Signal_volt[n] << "\n";
file.close();
}
@ -297,8 +292,8 @@ void Excitation::DumpCurrentExcite(string filename)
file.open( filename.c_str() );
if (file.fail())
return;
for (unsigned int n=1; n<Length+1; ++n)
file << (n-1)*dT + 0.5*dT << "\t" << Signal_curr[n] << "\n";
for (unsigned int n=0; n<Length; ++n)
file << n*dT + 0.5*dT << "\t" << Signal_curr[n] << "\n";
file.close();
}

12
FDTD/extensions/engine_ext_excitation.cpp
View File

@ -54,7 +54,7 @@ void Engine_Ext_Excitation::Apply2Voltages()
exc_pos = numTS - (int)m_Op_Exc->Volt_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Volt_dir[n];
pos[0]=m_Op_Exc->Volt_index[0][n];
pos[1]=m_Op_Exc->Volt_index[1][n];
@ -71,7 +71,7 @@ void Engine_Ext_Excitation::Apply2Voltages()
exc_pos = numTS - (int)m_Op_Exc->Volt_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Volt_dir[n];
pos[0]=m_Op_Exc->Volt_index[0][n];
pos[1]=m_Op_Exc->Volt_index[1][n];
@ -87,7 +87,7 @@ void Engine_Ext_Excitation::Apply2Voltages()
exc_pos = numTS - (int)m_Op_Exc->Volt_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Volt_dir[n];
pos[0]=m_Op_Exc->Volt_index[0][n];
pos[1]=m_Op_Exc->Volt_index[1][n];
@ -124,7 +124,7 @@ void Engine_Ext_Excitation::Apply2Current()
exc_pos = numTS - (int)m_Op_Exc->Curr_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Curr_dir[n];
pos[0]=m_Op_Exc->Curr_index[0][n];
pos[1]=m_Op_Exc->Curr_index[1][n];
@ -141,7 +141,7 @@ void Engine_Ext_Excitation::Apply2Current()
exc_pos = numTS - (int)m_Op_Exc->Curr_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Curr_dir[n];
pos[0]=m_Op_Exc->Curr_index[0][n];
pos[1]=m_Op_Exc->Curr_index[1][n];
@ -157,7 +157,7 @@ void Engine_Ext_Excitation::Apply2Current()
exc_pos = numTS - (int)m_Op_Exc->Curr_delay[n];
exc_pos *= (exc_pos>0);
exc_pos %= p;
exc_pos *= (exc_pos<=(int)length);
exc_pos *= (exc_pos<(int)length);
ny = m_Op_Exc->Curr_dir[n];
pos[0]=m_Op_Exc->Curr_index[0][n];
pos[1]=m_Op_Exc->Curr_index[1][n];

4
FDTD/extensions/engine_ext_tfsf.cpp
View File

@ -44,7 +44,7 @@ void Engine_Ext_TFSF::DoPostVoltageUpdates()
{
if ( numTS < n )
m_DelayLookup[n]=0;
else if ((numTS-n > length) && (p==0))
else if ((numTS-n >= length) && (p==0))
m_DelayLookup[n]=0;
else
m_DelayLookup[n] = numTS - n;
@ -134,7 +134,7 @@ void Engine_Ext_TFSF::DoPostCurrentUpdates()
{
if ( numTS < n )
m_DelayLookup[n]=0;
else if ((numTS-n > length) && (p==0))
else if ((numTS-n >= length) && (p==0))
m_DelayLookup[n]=0;
else
m_DelayLookup[n] = numTS - n;