WOLFRAM SYSTEM MODELER

WeightEstimation

Comparison of the performance of Boeing 737-800 with known and estimated mass properties

Diagram

Wolfram Language

In[1]:=
SystemModel["Aircraft.Examples.WeightEstimation"]
Out[1]:=

Information

Comparison of Boeing 737-800 with Known and Estimated Mass Properties

This example compares the flight of Boeing 737-800 for a 3 h 15 min flight with its known mass properties (mass, inertia tensor and center of mass location) and mass properties that are estimated by using the weight estimation method found in the Aircraft library. The weight estimation method is presented in detail in reference [1]. Both aircraft are given the same reference trajectory.

The control panel for the aircraft design variables allows exploring how the adjustments in the design variables that are used to estimate the mass properties of an aircraft affect the performance of the Boeing 737-800. Additionally, the control panel lets the user adjust the amount of fuel carried onboard and resize the engines.

The first default plot shows the plots of interest when comparing the two variants of Boeing 737-800. With the estimated mass properties, the aircraft becomes slightly lighter than the known total mass of Boeing 737-800, thus resulting in smaller throttle demand and smaller fuel consumption.


The second default plot, on the other hand, shows how the aircraft fulfills the set constraints on the load factor and dynamic pressure during the flight. The values of the constraints are design variables in the weight estimation method used and thereby will also affect the estimated mass properties, as can be seen by adjusting their values in the control panel.

[1]  Erä-Esko, N. (2022). Development and Use of System Modeler 6DOF Flight Mechanics Model in Aircraft Conceptual DesignAvailable atmodelica://Aircraft/Resources/Documents/EraeEskoThesis.pdf.

Components (10)

boeing737800

Type: Boeing737800

Description: Boeing 737-800 with known values

deg2Rad

Type: From_deg

Description: Convert from degree to radian

autopilot

Type: AutopilotTurbofan

Description: Autopilot for passenger aircraft with turbofan propulsion

boeing737800WE

Type: Boeing737800

Description: Boeing 737-800 with weight estimation values

refAltitude

Type: TimeTable

Description: Altitude commands

refTrack

Type: TimeTable

Description: Track commands

refVtot

Type: TimeTable

Description: Total velocity commands

autopilotWE

Type: AutopilotTurbofan

Description: Autopilot for passenger aircraft with turbofan propulsion

kmh2ms

Type: From_kmh

Description: Convert from kilometre per hour to metre per second

world

Type: World

Description: World coordinate system used in aircraft libray