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flightgear/Simulator/FDM/LaRCsim.cxx
1999-04-05 21:32:32 +00:00

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// LaRCsim.cxx -- interface to the LaRCsim flight model
//
// Written by Curtis Olson, started October 1998.
//
// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
// (Log is kept at end of this file)
#include "LaRCsim.hxx"
#include <Aircraft/aircraft.hxx>
#include <Controls/controls.hxx>
#include <Debug/logstream.hxx>
#include <FDM/flight.hxx>
#include <FDM/LaRCsim/ls_cockpit.h>
#include <FDM/LaRCsim/ls_generic.h>
#include <FDM/LaRCsim/ls_interface.h>
// Initialize the LaRCsim flight model, dt is the time increment for
// each subsequent iteration through the EOM
int fgLaRCsimInit(double dt) {
ls_toplevel_init(dt);
return(1);
}
// Run an iteration of the EOM (equations of motion)
int fgLaRCsimUpdate(FGInterface& f, int multiloop) {
double save_alt = 0.0;
// lets try to avoid really screwing up the LaRCsim model
if ( f.get_Altitude() < -9000.0 ) {
save_alt = f.get_Altitude();
f.set_Altitude( 0.0 );
}
// copy control positions into the LaRCsim structure
Lat_control = controls.get_aileron();
Long_control = controls.get_elevator();
Long_trim = controls.get_elevator_trim();
Rudder_pedal = controls.get_rudder();
Throttle_pct = controls.get_throttle( 0 );
Brake_pct = controls.get_brake( 0 );
// Inform LaRCsim of the local terrain altitude
Runway_altitude = f.get_Runway_altitude();
// old -- FGInterface_2_LaRCsim() not needed except for Init()
// translate FG to LaRCsim structure
// FGInterface_2_LaRCsim(f);
// printf("FG_Altitude = %.2f\n", FG_Altitude * 0.3048);
// printf("Altitude = %.2f\n", Altitude * 0.3048);
// printf("Radius to Vehicle = %.2f\n", Radius_to_vehicle * 0.3048);
ls_update(multiloop);
// printf("%d FG_Altitude = %.2f\n", i, FG_Altitude * 0.3048);
// printf("%d Altitude = %.2f\n", i, Altitude * 0.3048);
// translate LaRCsim back to FG structure so that the
// autopilot (and the rest of the sim can use the updated
// values
fgLaRCsim_2_FGInterface(f);
// but lets restore our original bogus altitude when we are done
if ( save_alt < -9000.0 ) {
f.set_Altitude( save_alt );
}
return 1;
}
// Convert from the FGInterface struct to the LaRCsim generic_ struct
int FGInterface_2_LaRCsim (FGInterface& f) {
Mass = f.get_Mass();
I_xx = f.get_I_xx();
I_yy = f.get_I_yy();
I_zz = f.get_I_zz();
I_xz = f.get_I_xz();
// Dx_pilot = f.get_Dx_pilot();
// Dy_pilot = f.get_Dy_pilot();
// Dz_pilot = f.get_Dz_pilot();
Dx_cg = f.get_Dx_cg();
Dy_cg = f.get_Dy_cg();
Dz_cg = f.get_Dz_cg();
// F_X = f.get_F_X();
// F_Y = f.get_F_Y();
// F_Z = f.get_F_Z();
// F_north = f.get_F_north();
// F_east = f.get_F_east();
// F_down = f.get_F_down();
// F_X_aero = f.get_F_X_aero();
// F_Y_aero = f.get_F_Y_aero();
// F_Z_aero = f.get_F_Z_aero();
// F_X_engine = f.get_F_X_engine();
// F_Y_engine = f.get_F_Y_engine();
// F_Z_engine = f.get_F_Z_engine();
// F_X_gear = f.get_F_X_gear();
// F_Y_gear = f.get_F_Y_gear();
// F_Z_gear = f.get_F_Z_gear();
// M_l_rp = f.get_M_l_rp();
// M_m_rp = f.get_M_m_rp();
// M_n_rp = f.get_M_n_rp();
// M_l_cg = f.get_M_l_cg();
// M_m_cg = f.get_M_m_cg();
// M_n_cg = f.get_M_n_cg();
// M_l_aero = f.get_M_l_aero();
// M_m_aero = f.get_M_m_aero();
// M_n_aero = f.get_M_n_aero();
// M_l_engine = f.get_M_l_engine();
// M_m_engine = f.get_M_m_engine();
// M_n_engine = f.get_M_n_engine();
// M_l_gear = f.get_M_l_gear();
// M_m_gear = f.get_M_m_gear();
// M_n_gear = f.get_M_n_gear();
// V_dot_north = f.get_V_dot_north();
// V_dot_east = f.get_V_dot_east();
// V_dot_down = f.get_V_dot_down();
// U_dot_body = f.get_U_dot_body();
// V_dot_body = f.get_V_dot_body();
// W_dot_body = f.get_W_dot_body();
// A_X_cg = f.get_A_X_cg();
// A_Y_cg = f.get_A_Y_cg();
// A_Z_cg = f.get_A_Z_cg();
// A_X_pilot = f.get_A_X_pilot();
// A_Y_pilot = f.get_A_Y_pilot();
// A_Z_pilot = f.get_A_Z_pilot();
// N_X_cg = f.get_N_X_cg();
// N_Y_cg = f.get_N_Y_cg();
// N_Z_cg = f.get_N_Z_cg();
// N_X_pilot = f.get_N_X_pilot();
// N_Y_pilot = f.get_N_Y_pilot();
// N_Z_pilot = f.get_N_Z_pilot();
// P_dot_body = f.get_P_dot_body();
// Q_dot_body = f.get_Q_dot_body();
// R_dot_body = f.get_R_dot_body();
V_north = f.get_V_north();
V_east = f.get_V_east();
V_down = f.get_V_down();
// V_north_rel_ground = f.get_V_north_rel_ground();
// V_east_rel_ground = f.get_V_east_rel_ground();
// V_down_rel_ground = f.get_V_down_rel_ground();
// V_north_airmass = f.get_V_north_airmass();
// V_east_airmass = f.get_V_east_airmass();
// V_down_airmass = f.get_V_down_airmass();
// V_north_rel_airmass = f.get_V_north_rel_airmass();
// V_east_rel_airmass = f.get_V_east_rel_airmass();
// V_down_rel_airmass = f.get_V_down_rel_airmass();
// U_gust = f.get_U_gust();
// V_gust = f.get_V_gust();
// W_gust = f.get_W_gust();
// U_body = f.get_U_body();
// V_body = f.get_V_body();
// W_body = f.get_W_body();
// V_rel_wind = f.get_V_rel_wind();
// V_true_kts = f.get_V_true_kts();
// V_rel_ground = f.get_V_rel_ground();
// V_inertial = f.get_V_inertial();
// V_ground_speed = f.get_V_ground_speed();
// V_equiv = f.get_V_equiv();
// V_equiv_kts = f.get_V_equiv_kts();
// V_calibrated = f.get_V_calibrated();
// V_calibrated_kts = f.get_V_calibrated_kts();
P_body = f.get_P_body();
Q_body = f.get_Q_body();
R_body = f.get_R_body();
// P_local = f.get_P_local();
// Q_local = f.get_Q_local();
// R_local = f.get_R_local();
// P_total = f.get_P_total();
// Q_total = f.get_Q_total();
// R_total = f.get_R_total();
// Phi_dot = f.get_Phi_dot();
// Theta_dot = f.get_Theta_dot();
// Psi_dot = f.get_Psi_dot();
// Latitude_dot = f.get_Latitude_dot();
// Longitude_dot = f.get_Longitude_dot();
// Radius_dot = f.get_Radius_dot();
Lat_geocentric = f.get_Lat_geocentric();
Lon_geocentric = f.get_Lon_geocentric();
Radius_to_vehicle = f.get_Radius_to_vehicle();
Latitude = f.get_Latitude();
Longitude = f.get_Longitude();
Altitude = f.get_Altitude();
Phi = f.get_Phi();
Theta = f.get_Theta();
Psi = f.get_Psi();
// T_local_to_body_11 = f.get_T_local_to_body_11();
// T_local_to_body_12 = f.get_T_local_to_body_12();
// T_local_to_body_13 = f.get_T_local_to_body_13();
// T_local_to_body_21 = f.get_T_local_to_body_21();
// T_local_to_body_22 = f.get_T_local_to_body_22();
// T_local_to_body_23 = f.get_T_local_to_body_23();
// T_local_to_body_31 = f.get_T_local_to_body_31();
// T_local_to_body_32 = f.get_T_local_to_body_32();
// T_local_to_body_33 = f.get_T_local_to_body_33();
// Gravity = f.get_Gravity();
// Centrifugal_relief = f.get_Centrifugal_relief();
// Alpha = f.get_Alpha();
// Beta = f.get_Beta();
// Alpha_dot = f.get_Alpha_dot();
// Beta_dot = f.get_Beta_dot();
// Cos_alpha = f.get_Cos_alpha();
// Sin_alpha = f.get_Sin_alpha();
// Cos_beta = f.get_Cos_beta();
// Sin_beta = f.get_Sin_beta();
// Cos_phi = f.get_Cos_phi();
// Sin_phi = f.get_Sin_phi();
// Cos_theta = f.get_Cos_theta();
// Sin_theta = f.get_Sin_theta();
// Cos_psi = f.get_Cos_psi();
// Sin_psi = f.get_Sin_psi();
// Gamma_vert_rad = f.get_Gamma_vert_rad();
// Gamma_horiz_rad = f.get_Gamma_horiz_rad();
// Sigma = f.get_Sigma();
// Density = f.get_Density();
// V_sound = f.get_V_sound();
// Mach_number = f.get_Mach_number();
// Static_pressure = f.get_Static_pressure();
// Total_pressure = f.get_Total_pressure();
// Impact_pressure = f.get_Impact_pressure();
// Dynamic_pressure = f.get_Dynamic_pressure();
// Static_temperature = f.get_Static_temperature();
// Total_temperature = f.get_Total_temperature();
Sea_level_radius = f.get_Sea_level_radius();
Earth_position_angle = f.get_Earth_position_angle();
Runway_altitude = f.get_Runway_altitude();
// Runway_latitude = f.get_Runway_latitude();
// Runway_longitude = f.get_Runway_longitude();
// Runway_heading = f.get_Runway_heading();
// Radius_to_rwy = f.get_Radius_to_rwy();
// D_cg_north_of_rwy = f.get_D_cg_north_of_rwy();
// D_cg_east_of_rwy = f.get_D_cg_east_of_rwy();
// D_cg_above_rwy = f.get_D_cg_above_rwy();
// X_cg_rwy = f.get_X_cg_rwy();
// Y_cg_rwy = f.get_Y_cg_rwy();
// H_cg_rwy = f.get_H_cg_rwy();
// D_pilot_north_of_rwy = f.get_D_pilot_north_of_rwy();
// D_pilot_east_of_rwy = f.get_D_pilot_east_of_rwy();
// D_pilot_above_rwy = f.get_D_pilot_above_rwy();
// X_pilot_rwy = f.get_X_pilot_rwy();
// Y_pilot_rwy = f.get_Y_pilot_rwy();
// H_pilot_rwy = f.get_H_pilot_rwy();
return( 0 );
}
// Convert from the LaRCsim generic_ struct to the FGInterface struct
int fgLaRCsim_2_FGInterface (FGInterface& f) {
// Mass properties and geometry values
f.set_Inertias( Mass, I_xx, I_yy, I_zz, I_xz );
// f.set_Pilot_Location( Dx_pilot, Dy_pilot, Dz_pilot );
f.set_CG_Position( Dx_cg, Dy_cg, Dz_cg );
// Forces
// f.set_Forces_Body_Total( F_X, F_Y, F_Z );
// f.set_Forces_Local_Total( F_north, F_east, F_down );
// f.set_Forces_Aero( F_X_aero, F_Y_aero, F_Z_aero );
// f.set_Forces_Engine( F_X_engine, F_Y_engine, F_Z_engine );
// f.set_Forces_Gear( F_X_gear, F_Y_gear, F_Z_gear );
// Moments
// f.set_Moments_Total_RP( M_l_rp, M_m_rp, M_n_rp );
// f.set_Moments_Total_CG( M_l_cg, M_m_cg, M_n_cg );
// f.set_Moments_Aero( M_l_aero, M_m_aero, M_n_aero );
// f.set_Moments_Engine( M_l_engine, M_m_engine, M_n_engine );
// f.set_Moments_Gear( M_l_gear, M_m_gear, M_n_gear );
// Accelerations
// f.set_Accels_Local( V_dot_north, V_dot_east, V_dot_down );
// f.set_Accels_Body( U_dot_body, V_dot_body, W_dot_body );
// f.set_Accels_CG_Body( A_X_cg, A_Y_cg, A_Z_cg );
// f.set_Accels_Pilot_Body( A_X_pilot, A_Y_pilot, A_Z_pilot );
// f.set_Accels_CG_Body_N( N_X_cg, N_Y_cg, N_Z_cg );
// f.set_Accels_Pilot_Body_N( N_X_pilot, N_Y_pilot, N_Z_pilot );
// f.set_Accels_Omega( P_dot_body, Q_dot_body, R_dot_body );
// Velocities
f.set_Velocities_Local( V_north, V_east, V_down );
// f.set_Velocities_Ground( V_north_rel_ground, V_east_rel_ground,
// V_down_rel_ground );
// f.set_Velocities_Local_Airmass( V_north_airmass, V_east_airmass,
// V_down_airmass );
// f.set_Velocities_Local_Rel_Airmass( V_north_rel_airmass,
// V_east_rel_airmass, V_down_rel_airmass );
// f.set_Velocities_Gust( U_gust, V_gust, W_gust );
// f.set_Velocities_Wind_Body( U_body, V_body, W_body );
// f.set_V_rel_wind( V_rel_wind );
// f.set_V_true_kts( V_true_kts );
// f.set_V_rel_ground( V_rel_ground );
// f.set_V_inertial( V_inertial );
// f.set_V_ground_speed( V_ground_speed );
// f.set_V_equiv( V_equiv );
f.set_V_equiv_kts( V_equiv_kts );
// f.set_V_calibrated( V_calibrated );
// f.set_V_calibrated_kts( V_calibrated_kts );
f.set_Omega_Body( P_body, Q_body, R_body );
// f.set_Omega_Local( P_local, Q_local, R_local );
// f.set_Omega_Total( P_total, Q_total, R_total );
// f.set_Euler_Rates( Phi_dot, Theta_dot, Psi_dot );
f.set_Geocentric_Rates( Latitude_dot, Longitude_dot, Radius_dot );
FG_LOG( FG_FLIGHT, FG_DEBUG, "lon = " << Longitude
<< " lat_geoc = " << Lat_geocentric << " lat_geod = " << Latitude
<< " alt = " << Altitude << " sl_radius = " << Sea_level_radius
<< " radius_to_vehicle = " << Radius_to_vehicle );
// Positions
f.set_Geocentric_Position( Lat_geocentric, Lon_geocentric,
Radius_to_vehicle );
f.set_Geodetic_Position( Latitude, Longitude, Altitude );
f.set_Euler_Angles( Phi, Theta, Psi );
// Miscellaneous quantities
f.set_T_Local_to_Body(T_local_to_body_m);
// f.set_Gravity( Gravity );
// f.set_Centrifugal_relief( Centrifugal_relief );
f.set_Alpha( Alpha );
f.set_Beta( Beta );
// f.set_Alpha_dot( Alpha_dot );
// f.set_Beta_dot( Beta_dot );
// f.set_Cos_alpha( Cos_alpha );
// f.set_Sin_alpha( Sin_alpha );
// f.set_Cos_beta( Cos_beta );
// f.set_Sin_beta( Sin_beta );
// f.set_Cos_phi( Cos_phi );
// f.set_Sin_phi( Sin_phi );
// f.set_Cos_theta( Cos_theta );
// f.set_Sin_theta( Sin_theta );
// f.set_Cos_psi( Cos_psi );
// f.set_Sin_psi( Sin_psi );
f.set_Gamma_vert_rad( Gamma_vert_rad );
// f.set_Gamma_horiz_rad( Gamma_horiz_rad );
// f.set_Sigma( Sigma );
// f.set_Density( Density );
// f.set_V_sound( V_sound );
// f.set_Mach_number( Mach_number );
// f.set_Static_pressure( Static_pressure );
// f.set_Total_pressure( Total_pressure );
// f.set_Impact_pressure( Impact_pressure );
// f.set_Dynamic_pressure( Dynamic_pressure );
// f.set_Static_temperature( Static_temperature );
// f.set_Total_temperature( Total_temperature );
f.set_Sea_level_radius( Sea_level_radius );
f.set_Earth_position_angle( Earth_position_angle );
f.set_Runway_altitude( Runway_altitude );
// f.set_Runway_latitude( Runway_latitude );
// f.set_Runway_longitude( Runway_longitude );
// f.set_Runway_heading( Runway_heading );
// f.set_Radius_to_rwy( Radius_to_rwy );
// f.set_CG_Rwy_Local( D_cg_north_of_rwy, D_cg_east_of_rwy, D_cg_above_rwy);
// f.set_CG_Rwy_Rwy( X_cg_rwy, Y_cg_rwy, H_cg_rwy );
// f.set_Pilot_Rwy_Local( D_pilot_north_of_rwy, D_pilot_east_of_rwy,
// D_pilot_above_rwy );
// f.set_Pilot_Rwy_Rwy( X_pilot_rwy, Y_pilot_rwy, H_pilot_rwy );
f.set_sin_lat_geocentric(Lat_geocentric);
f.set_cos_lat_geocentric(Lat_geocentric);
f.set_sin_cos_longitude(Longitude);
f.set_sin_cos_latitude(Latitude);
// printf("sin_lat_geo %f cos_lat_geo %f\n", sin_Lat_geoc, cos_Lat_geoc);
// printf("sin_lat %f cos_lat %f\n",
// f.get_sin_latitude(), f.get_cos_latitude());
// printf("sin_lon %f cos_lon %f\n",
// f.get_sin_longitude(), f.get_cos_longitude());
return 0;
}
// $Log$
// Revision 1.1 1999/04/05 21:32:44 curt
// Initial revision
//
// Revision 1.12 1999/04/03 04:20:02 curt
// Optimizations (tm) by Norman Vine.
//
// Revision 1.11 1999/02/05 21:28:58 curt
// Modifications to incorporate Jon S. Berndts flight model code.
//
// Revision 1.10 1999/02/01 21:33:30 curt
// Renamed FlightGear/Simulator/Flight to FlightGear/Simulator/FDM since
// Jon accepted my offer to do this and thought it was a good idea.
//
// Revision 1.9 1999/01/08 19:27:36 curt
// Fixed AOA reading on HUD.
// Continued work on time jitter compensation.
//
// Revision 1.8 1998/12/18 23:37:06 curt
// Collapsed out the FGState variables not currently needed. They are just
// commented out and can be readded easily at any time. The point of this
// exersize is to determine which variables were or were not currently being
// used.
//
// Revision 1.7 1998/12/14 13:31:06 curt
// LaRCsim maintains all it's variables internally. I had been copying all of
// them back and forth to the FG struture everytime I updated the flight model.
// However, I have realized that this is not necessary. I just need to copy
// the control positions and environmental parameters into the LaRCsim structure
// before updating the FDM, then copy every thing back out into the publick FGFS
// structure afterwords. This seems to solve (or at least help) a westward
// drift problem some poeple had been observing.
//
// Revision 1.6 1998/12/05 15:54:08 curt
// Renamed class fgFLIGHT to class FGState as per request by JSB.
//
// Revision 1.5 1998/12/03 04:25:02 curt
// Working on fixing up new fgFLIGHT class.
//
// Revision 1.4 1998/12/03 01:16:37 curt
// Converted fgFLIGHT to a class.
//
// Revision 1.3 1998/10/25 14:08:43 curt
// Turned "struct fgCONTROLS" into a class, with inlined accessor functions.
//
// Revision 1.2 1998/10/17 01:34:11 curt
// C++ ifying ...
//
// Revision 1.1 1998/10/17 00:43:58 curt
// Initial revision.
//
//