Design of an aircraft autonomous traction taxiing system based on hydraulic secondary control

At present, aircraft taxiing at ground airports needs to be provided with a thrust by the main engine. The taxiing process is inefficient, has high fuel consumption and serious pollution, and is prone to safety risks. In this paper, a new configuration of aircraft autonomous traction taxiing system is proposed based on the principle of hydraulic secondary control, in which a hydraulic motor drive device is installed at the front wheels of the aircraft to drive the wheels to rotate forward or backward. Based on this, autonomous taxiing can be realized without relying on the main engines, thus greatly improving airport operation efficiency. Meanwhile, this paper analyzes the influencing factors of the autonomous traction taxiing process, and investigates the parameter matching design of the new configuration system. Besides, this paper develops the ground principle prototype, designs the aircraft longitudinal bonding force observer and the aircraft wheel disturbance moment observer, and proposes the speed control method of the aircraft front wheel autonomous traction taxiing by considering the ground bonding force saturation characteristics. Finally, the ground taxiing test is conducted, and the results show that the new configuration proposed in this paper presents a new solution for aircraft autonomous traction taxiing.