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An improvement strategy which controls the shift effort and the power summing planetary gear set of steering clutches and brakes have been proposed based on the dynamic model of synchroniser in order to decrease the wear of synchroniser inserts,make gear shift easy and reduce the shock noise for a positive independent mechanical split path transmission which attached an automatic shift system when shifting.A kinetics model for the process of synchroniser engagement is built and analyzed in the paper.Thus for optimizing the gear shift process which is divided into three phases a model reference fuzzy self-adaption system is adopted.Through a 6000 km road experiment,the control strategy has proved feasible and dependable.
An improvement strategy which controls the shift effort and the power supper planetary gear set of steering clutches and brakes have been proposed based on the dynamic model of synchroniser in order to decrease the wear of synchroniser inserts, make gear shift easy and reduce the shock noise for a positive independent mechanical split path transmission which attached an automatic shift system when shifting. an kinetics model for the process of synchroniser engagement is built and analyzed in the paper.Thus for optimizing the gear shift process which is divided into three phases a model reference fuzzy self-adaption system is adopted. Through a 6000 km road experiment, the control strategy has proved feasible and dependable.