Abstract
The rudder brake pedal unit is an important part of aircraft flight control system, also is the human machine interface for pilots to control the aircraft rudder and brake. By applying forces at different positions and directions on the pedals, the pilot can realize the rudder control and brake control functions respectively. This paper takes the rudder brake pedal control unit of civil aircraft as the research object. The research process is as follows. Firstly, an analysis about the influence on the compression of brake sensor by operating pedal when the brake pedal jamming is carried out using CATIA. Secondly, the forces acted on aircraft during rolling on the ground are analyzed and the ground dynamic equations are presented. Finally, through the simulation on the engineering simulator of a certain aircraft, the influence of differential brake caused by brake pedal jamming on the aircraft speed after V1 (take-off decision speed) in the take-off phase is verified. The research results of this study show that, the impact of un-commanded differential brake caused by rudder brake pedal jamming on the safety of the aircraft must be considered during the aircraft design process, and effective measures must be taken to avoid the occurrence of un-commanded deceleration after V1 in the take-off phase.
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