Optimal Control of Gear Shift Synchronization Process for Tracked Vehicle Automated Mechanical Transmission

Aiming at the problems of broken tooth and apical tooth caused by large gear shift impact for tracked vehicle Automated Mechanical Transmission (AMT), based on the analysis of the gear shift synchronization process and its evaluation indicators (shift synchronization time, impact degree, and sliding friction power), and establishing mathematical model, an optimal control method of gear shift synchronization process based on the minimum principle is proposed. Taking the impact degree and the sliding friction power of synchronization phase as optimization objective, a comprehensive optimal objective functional is established and optimized to obtain the comprehensive optimal shifting force change law in the synchronization process. Finally, the method is verified by MATLAB /Simulink, the simulation results show that this method can improve the shift quality and smoothness of tracked vehicle.