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author | Siddharth11235 | 2019-09-03 18:09:16 +0530 |
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committer | Siddharth11235 | 2019-09-03 18:09:16 +0530 |
commit | b4b6aa36e3486a3544acc52419149b5671f841e9 (patch) | |
tree | 66c1783158f23e6d21c77324156fc57e18d4ac67 /FlightLongs.mo | |
parent | f5266f634f4fb4fd39933a83551a01cf446256b8 (diff) | |
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Diffstat (limited to 'FlightLongs.mo')
-rw-r--r-- | FlightLongs.mo | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/FlightLongs.mo b/FlightLongs.mo new file mode 100644 index 0000000..3f5ecce --- /dev/null +++ b/FlightLongs.mo @@ -0,0 +1,123 @@ +model FlightLongs + +import Modelica.Blocks.Interfaces.*; + +parameter Real rho = 1.225; +parameter Real m = 1043.26;//1.56 for zagi +parameter Real S_ref = 16.1651;//reference area +parameter Real C_bar = 1.493 ;//average chord +parameter Real b = 10.911 ;//span +parameter Real g = 9.81;//gravitational force +//parameter Real b= 1.4224, cbar = 0.3302,s = 0.2589; + + + +parameter Real CD0 = 0.036;//= 0.01631;for Zagi +parameter Real K_drag = 0.0830304;//for cessna +parameter Real CD_beta = 0.17;//for cessna +parameter Real CD_alpha= 0.2108; +parameter Real CD_q = 0; +parameter Real CD_delta_e= 0.3045; + +//side force +parameter Real Cy_beta = -0.31;//for cessna +parameter Real Cy_p = -0.037;//for cessna +parameter Real Cy_r = 0.21;//for cessna +parameter Real Cy_delta_r = 0.187; //for cessna +parameter Real Cy_delta_a= 0; //for cessna + +// lift +parameter Real CL0 = 0.25; //for cessna +parameter Real CL_alpha = 4.47;//for cessna +parameter Real CL_q = 3.9;//for cessna +parameter Real CL_delta_e = 0.3476;//for cessna + +// rolling moment +parameter Real Cl_beta = -0.089;//for cessna +parameter Real Cl_p = -0.47;//for cessna +parameter Real Cl_r = 0.096;//for cessna +parameter Real Cl_delta_a= -0.09;//for cessna +parameter Real Cl_delta_r = 0.0147;//for cessna + +// pitching moment +parameter Real Cm0 = -0.02;//for cessna +parameter Real Cm_alpha = -1.8;//for cessna +parameter Real Cm_q = -12.4;//for cessna +parameter Real Cm_delta_e = -1.28;//for cessna + +// yawing moment +parameter Real Cn_beta = 0.065;//for cessna +parameter Real Cn_p = -0.03;//for cessna +parameter Real Cn_r = -0.99;//for cessna +parameter Real Cn_delta_a = -0.0053;//for cessna +parameter Real Cn_delta_r = -0.0657;//for cessna + + +//Initial conditions. (delta[2], thrust[1] and the others are straightforward) + +parameter Real I_yy = 1824.93; + + +Real CL; +Real CD; +Real Cm; +Real CX; +Real CZ; + + + RealInput del (start = -0.15625) annotation( Placement(visible = true, transformation(origin = {-110, -33}, extent = {{-20, -20}, {20, 20}}, rotation = 0), iconTransformation(origin = {-110, -33}, extent = {{-20, -20}, {20, 20}}, rotation = 0))); + + RealInput thrust (start = 1112.82) annotation( Placement(visible = true, transformation(origin = {-110, 33}, extent = {{-20, -20}, {20, 20}}, rotation = 0), iconTransformation(origin = {-110, 33}, extent = {{-20, -20}, {20, 20}}, rotation = 0))); + + + Modelica.Blocks.Interfaces.RealOutput q (start = 0) annotation(Placement(visible = true, transformation(origin = {110, -50}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {110,-50}, extent = {{-10, -10}, {10, 10}}, rotation = 0))); + + Modelica.Blocks.Interfaces.RealOutput V (start = 39.8858) annotation(Placement(visible = true, transformation(origin = {110, 100}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {110,100}, extent = {{-10, -10}, {10, 10}}, rotation = 0))); + + + Modelica.Blocks.Interfaces.RealOutput theta (start = 0.1) annotation(Placement(visible = true, transformation(origin = {110, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {110,0}, extent = {{-10, -10}, {10, 10}}, rotation = 0))); + +Real x (start = 0.1); + Modelica.Blocks.Interfaces.RealOutput z (start = 100) annotation(Placement(visible = true, transformation(origin = {110, 50}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {110,50}, extent = {{-10, -10}, {10, 10}}, rotation = 0))); + +Real alpha (start = 0.1) ; +Real gamma = alpha - theta; + + +Real qbar = 0.5*rho*V^2; + +Real Vdot; +Real alphadot; +Real gammadot; +Real qdot; +Real xdot; +Real zdot; + + +equation +CL = CL0+CL_alpha*alpha+CL_delta_e*del; +CD = CD0 + K_drag*CL^2; +Cm = Cm0+Cm_alpha*alpha+Cm_delta_e*del; +CX = -CD*cos(alpha) + CL*sin(alpha); +CZ = -CD*sin(alpha) - CL*cos(alpha); + + +Vdot = der(V); +alphadot = der(alpha); +gammadot = der(gamma); +qdot = der(q); +xdot = der(x); +zdot = der(z); + + + +Vdot = (1/m) *(thrust*cos(alpha) -qbar*S_ref*CD - m*g*sin(gamma)); +alphadot = q - (-(g/V)*cos(gamma) + (qbar*S_ref*CL + thrust*sin(alpha))/(m*V)); +qdot = (1/I_yy)*(qbar*S_ref*C_bar*Cm); +gammadot = q; +xdot=V*cos(gamma); +zdot=-V*sin(gamma); + + annotation(experiment(StartTime = 0, StopTime = 100, Tolerance = 1e-3, Interval = 0.02), + uses(Modelica(version = "3.2.2"))); +end FlightLongs;
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