Backstepping Torque Controller for Cylindrical Cam in Sequential Type Gearshift Mechanism

Faster and efficient gear shifts have always been the demand of automobile industry. Be it an automatic transmission having distinctly low efficiency or an automated manual transmission with combined benefits of automatic and manual gearboxes, the phenomenon of gear shift has always been the area of interest. Sequential type gear shift mechanisms have been increasingly employed in automated manual transmissions due to their suitability to readily available (rotary) actuators. However, there is a dearth of published literature addressing the issue of modeling the dynamics of the system and developing a torque controller for such a gear shift mechanisms. The objective of this work is to first model the dynamics of the mechanism and then to design a controller for governing the torque applied on the cylindrical cam for the given mechanism parameters and time varying reference input. Both the issues i.e. reducing shifting time and improving efficiency of shifting can be addressed by the successful implementation of such a torque controller.

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