----------------------------------------------------------------------
HISTORY: 04/15/2000 initial release
+ 10/25/2001 (RD) Added new variables needed for the non-
+ linear Twin Otter model at zero flaps
+ (CXfxxf0)
+ 11/12/2001 (RD) Added new variables needed for the non-
+ linear Twin Otter model with flaps
+ (CXfxxf). Zero flap vairables removed.
+ 02/13/2002 (RD) Added variables so linear aero model
+ values can be recorded
+ 02/18/2002 (RD) Added uiuc_3Dinterp_quick() function
+ for a quicker 3D interpolation. Takes
+ advantage of "nice" data.
----------------------------------------------------------------------
AUTHOR(S): Bipin Sehgal <bsehgal@uiuc.edu>
Jeff Scott <jscott@mail.com>
+ Robert Deters <rdeters@uiuc.edu>
----------------------------------------------------------------------
CALLS TO: uiuc_1Dinterpolation
uiuc_2Dinterpolation
uiuc_ice_filter
+ uiuc_3Dinterpolation
+ uiuc_3Dinterp_quick
----------------------------------------------------------------------
**********************************************************************/
#include "uiuc_coef_drag.h"
-
+#include <math.h>
void uiuc_coef_drag()
{
string linetoken1;
string linetoken2;
stack command_list;
-
+
+ double q_nondim;
+
command_list = aeroDragParts -> getCommands();
for (LIST command_line = command_list.begin(); command_line!=command_list.end(); ++command_line)
{
CDo = uiuc_ice_filter(CDo_clean,kCDo);
}
+ CDo_save = CDo;
CD += CDo;
break;
}
{
CDK = uiuc_ice_filter(CDK_clean,kCDK);
}
+ CDK_save = CDK * CL * CL;
CD += CDK * CL * CL;
break;
}
{
CD_a = uiuc_ice_filter(CD_a_clean,kCD_a);
}
+ CD_a_save = CD_a * Alpha;
CD += CD_a * Alpha;
break;
}
}
/* CD_adot must be mulitplied by cbar/2U
(see Roskam Control book, Part 1, pg. 147) */
+ CD_adot_save = CD_adot * Alpha_dot * cbar_2U;
CD += CD_adot * Alpha_dot * cbar_2U;
break;
}
(see Roskam Control book, Part 1, pg. 147) */
/* why multiply by Theta_dot instead of Q_body?
see note in coef_lift.cpp */
+ CD_q_save = CD_q * Theta_dot * cbar_2U;
CD += CD_q * Theta_dot * cbar_2U;
break;
}
case CD_ih_flag:
{
- CD += CD_ih * ih;
+ CD_ih_save = fabs(CD_ih * ih);
+ CD += fabs(CD_ih * ih);
break;
}
case CD_de_flag:
{
CD_de = uiuc_ice_filter(CD_de_clean,kCD_de);
}
- CD += CD_de * elevator;
+ CD_de_save = fabs(CD_de * elevator);
+ CD += fabs(CD_de * elevator);
break;
}
case CDfa_flag:
CXiced_tail += CXo;
}
}
+ CXo_save = CXo;
CX += CXo;
break;
}
CXiced_tail += CXK * CLiced_tail * CLiced_tail;
}
}
+ CXK_save = CXK * CZ * CZ;
CX += CXK * CZ * CZ;
break;
}
CXiced_tail += CX_a * Alpha;
}
}
+ CX_a_save = CX_a * Alpha;
CX += CX_a * Alpha;
break;
}
CXiced_tail += CX_a2 * Alpha * Alpha;
}
}
+ CX_a2_save = CX_a2 * Alpha * Alpha;
CX += CX_a2 * Alpha * Alpha;
break;
}
CXiced_tail += CX_a3 * Alpha * Alpha * Alpha;
}
}
+ CX_a3_save = CX_a3 * Alpha * Alpha * Alpha;
CX += CX_a3 * Alpha * Alpha * Alpha;
break;
}
}
/* CX_adot must be mulitplied by cbar/2U
(see Roskam Control book, Part 1, pg. 147) */
+ CX_adot_save = CX_adot * Alpha_dot * cbar_2U;
CX += CX_adot * Alpha_dot * cbar_2U;
break;
}
}
/* CX_q must be mulitplied by cbar/2U
(see Roskam Control book, Part 1, pg. 147) */
+ CX_q_save = CX_q * Q_body * cbar_2U;
CX += CX_q * Q_body * cbar_2U;
break;
}
CXiced_tail += CX_de * elevator;
}
}
+ CX_de_save = CX_de * elevator;
CX += CX_de * elevator;
break;
}
CXiced_tail += CX_dr * rudder;
}
}
+ CX_dr_save = CX_dr * rudder;
CX += CX_dr * rudder;
break;
}
CXiced_tail += CX * flap;
}
}
+ CX_df_save = CX_df * flap;
CX += CX_df * flap;
break;
}
CXiced_tail += CX_adf * Alpha * flap;
}
}
+ CX_adf_save = CX_adf * Alpha * flap;
CX += CX_adf * Alpha * flap;
break;
}
+ case CXfabetaf_flag:
+ {
+ if (CXfabetaf_nice == 1)
+ CXfabetafI = uiuc_3Dinterp_quick(CXfabetaf_fArray,
+ CXfabetaf_aArray_nice,
+ CXfabetaf_bArray_nice,
+ CXfabetaf_CXArray,
+ CXfabetaf_na_nice,
+ CXfabetaf_nb_nice,
+ CXfabetaf_nf,
+ flap_pos,
+ Alpha,
+ Beta);
+ else
+ CXfabetafI = uiuc_3Dinterpolation(CXfabetaf_fArray,
+ CXfabetaf_aArray,
+ CXfabetaf_betaArray,
+ CXfabetaf_CXArray,
+ CXfabetaf_nAlphaArray,
+ CXfabetaf_nbeta,
+ CXfabetaf_nf,
+ flap_pos,
+ Alpha,
+ Beta);
+ CX += CXfabetafI;
+ break;
+ }
+ case CXfadef_flag:
+ {
+ if (CXfadef_nice == 1)
+ CXfadefI = uiuc_3Dinterp_quick(CXfadef_fArray,
+ CXfadef_aArray_nice,
+ CXfadef_deArray_nice,
+ CXfadef_CXArray,
+ CXfadef_na_nice,
+ CXfadef_nde_nice,
+ CXfadef_nf,
+ flap_pos,
+ Alpha,
+ elevator);
+ else
+ CXfadefI = uiuc_3Dinterpolation(CXfadef_fArray,
+ CXfadef_aArray,
+ CXfadef_deArray,
+ CXfadef_CXArray,
+ CXfadef_nAlphaArray,
+ CXfadef_nde,
+ CXfadef_nf,
+ flap_pos,
+ Alpha,
+ elevator);
+ CX += CXfadefI;
+ break;
+ }
+ case CXfaqf_flag:
+ {
+ q_nondim = Q_body * cbar_2U;
+ if (CXfaqf_nice == 1)
+ CXfaqfI = uiuc_3Dinterp_quick(CXfaqf_fArray,
+ CXfaqf_aArray_nice,
+ CXfaqf_qArray_nice,
+ CXfaqf_CXArray,
+ CXfaqf_na_nice,
+ CXfaqf_nq_nice,
+ CXfaqf_nf,
+ flap_pos,
+ Alpha,
+ q_nondim);
+ else
+ CXfaqfI = uiuc_3Dinterpolation(CXfaqf_fArray,
+ CXfaqf_aArray,
+ CXfaqf_qArray,
+ CXfaqf_CXArray,
+ CXfaqf_nAlphaArray,
+ CXfaqf_nq,
+ CXfaqf_nf,
+ flap_pos,
+ Alpha,
+ q_nondim);
+ CX += CXfaqfI;
+ break;
+ }
};
} // end CD map
projects / flightgear.git / blobdiff