双侧独立电驱动履带车辆自动机械变速器线控换挡控制方法

为应用自动机械变速器(AMT)实现双侧独立电驱动履带车辆的换挡,降低换挡控制难度,设计非道路行驶时的换挡控制方法.基于无离合器、有同步器的两挡行星AMT,通过线控系统及纯电动换挡机构进行换挡操纵;对驱动电机调速以实现主动同步,接近同步后开始挂挡,由同步器辅助精确同步;使两侧变速器同时开始换挡,但不要求两侧精确同时完成....

Control Method for AMT Shifting of a Shift-by-wire Bilateral Electric Drive Tracked Vehicle

A suitable simplified shifting control method is designed for using automated mechanical transmission(AMT) to realize the shifting of bilateral electric drive tracked vehicle. AMT is a clutchless two-speed planetary gearbox. Gear shifting is electric and driven by wire. During synchronizing phase, the speed of input shaft is roughly synchronized using traction motor; during gear engaging phase, the accurate speed matching is supposed to be ensured by the synchronizer. Two gearboxes are used for vehicle shifting. Their shifting processes start simultaneously and last independently. Upshifting and downshifting are tested for many times when driving forwardly on soft soil land. Test results show that shifting is executed successfully and efficiently; the synchronizers hardly lock to cause wear; upshifting needs longer time than downshifting as vehicle speed remains unchanged; upshifting and downshifting times both tend to be longer as vehicle speed becomes higher; two gearboxes accomplish shifting almost simultaneously; while shifting, the environment mainly causes vehicle speed reduction, and hardly causes the speed difference of vehicle track.