Browse Publications Technical Papers 2006-01-2853
2006-11-21

Light Aircraft Ground Steering Simulation 2006-01-2853

The demands for light jets have been increasing and new developments are rising to supply this market. The major concern in the development of a new aircraft is the customer satisfaction. The satisfaction is linked with safety and comfort even if the aircraft is flying or running on the ground.
This paper presents simulations of ground maneuvers to estimate pilot effort at steering pedals and aircraft turning capability, to evaluate comfort level and compliance with applicable requirements. These simulations consider aerodynamic effects, tire to ground interactions, engine thrust, brakes control and shock absorber behavior. To control the aircraft during the maneuvers a PID controller was implemented to simulate pilot inputs. Tires elastic properties were modeled and their influence on steering comfort was considered as well.
The aircraft behavior when subjected to critical engine failure at take-off was evaluated to comply with trajectory deviation requirements. To increase controllability of the aircraft at engine failure condition the mechanism was tuned in order to optimize the authority of wheel steering and rudder. Parametric variations of landing gear geometry, tire elastic properties and steering system losses were evaluated. Simulation results show possibilities of improvement in the required steering force and aircraft control at ground.

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