In-Flight Weight and Balance Identification Using Neural Networks

Modeling and attitude control of aircraft with center of gravity variations

“…position of an aircraft [12] is based on online processing of the total takeoff weight, the updated quantities of fuel in the various tanks, the measurement or estimation of passengers and loads. This known method may lead to erroneous C.G.…”

“…control aircraft, most of the flight is performed along straight paths, with relatively short periods of heading and airspeed changes [5] [12]. Accordingly, the aircraft could be assumed as trimmed, and analysis of trimmed flight can be used to full effect.…”

“…Accordingly, the aircraft could be assumed as trimmed, and analysis of trimmed flight can be used to full effect. Figure 4 shows the relations between forces and moments on the aircraft [12]. L C , D C , W C , T C are the dimensionless lift, drag, gravity and propulsion forces.…”

“…As the accurate aerodynamic coefficients are usually unknown, direct calculations using (32) would be unavailable [12]. However, these coefficients could be expressed as the functions of the flight variables iii.…”