ESA Document - Emits - ESA

s
4000
2000
0
Position PCI x,y,z [km] (blue, red, green)
-2000
0 100 200 300 400 500 600
2
0
-2
Velocity PCI x,y,z [km/s] (blue, red, green)
-4
0 100 200 300 400 500 600
20
10
0
-10
Angular Rates roll,pitch,yaw [deg/s] (blue, red, green)
-20
0 100 200 300
Time [s]
400 500 600
12000
10000
30
20
10
8000
6000
Figure 4-96: 6DoF trajectory characteristics
4.4.5.6 MonteCarlo for performance verification
Mach Number [-]
0
0 200 400 600
8 x 10 -3 Density [kg/m3]
6
4
2
0
0 200 400 600
Scale Height [m]
4000
0 200
Time [s]
400 600
HMM
Assessment Study
Report: CDF-20(A)
February 2004
page 354 of 422
The next step in the design is to run a MonteCarlo campaign for performance verification. For
this step, the following parameters were scanned during the simulations:
• Uncertainty on Mass properties:
o mass_delta = 1 % [%] Uncertainty of the nominal mass
o CoG_x_delta = 1 % [%] Uncertainty of CoG position in X direction
o CoG_y_delta = 1 % [%] Uncertainty of CoG position in Y direction
o CoG_z_delta = 1 % [%] Uncertainty of CoG position in Z direction
• Uncertainty on Initial state
o pos_alt_delta = 0.0 % [m] Uncertainty in initial altitude
o pos_LL = 0.03 % [degrees] Uncertainty in latitude/longitude
o vel_speed_delta = 0.39 % [m/s] Uncertainty in speed
o FPA = 0.129 % [degrees] Uncertainty in flight path angle and azimuth
• Uncertainty on Aerodynamic model
o total_lift = 10 %
o total_drag = 10 %
o aerotorque = 10 %
• Uncertainty on Atmospheric properties
o Atmos_P_D_T = 5 %
• Uncertainty on Thrust level
o Isp_direction = 0.5 %
• Uncertainty on Sensors
o IMU = 0.5 %
o RA = 10 %