Research on Transmission Mechanism Synchronism of Hydraulic Thrust Reverser Actuation System

Aiming at the mechanical synchronization problem between actuators in the hydraulic thrust reverser actuation system (TRAS) of large aircraft engine, the synchronization performance of the transmission mechanism is studied. Based on the working principle of the synchronous transmission mechanism, the dynamic model of the synchronous transmission mechanism is established, and the influence of the actuator transmission ratio, the asynchronous load and the flexibility of the synchronous flexible shaft (SFS) on the synchronism of the transmission mechanism is simulated and analyzed. The H-TRAS synchronism experiment platform is built, and the synchronicity of the transmission mechanism is verified. The simulation and experimental results show that the synchronization error of the rigid-flexible coupling synchronous transmission mechanism increases with the increase of the actuator transmission ratio, the asynchronous load and the SFS flexibility. The H-TRAS mechanical synchronous precision can be better than 0.5% by optimizing the parameters of the transmission mechanism. The results of simulation analysis are consistent with the experimental results, which can be used as a reference for the parameter design and fault diagnosis of the H-TRAS synchronous transmission mechanism.