关键词: 履带车辆, 两挡行星自动机械变速器, 双侧独立电驱动, 线控换挡

Abstract: 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.

Key words: trackedvehicle, two-speedplanetaryautomatedmechanicaltransmission, bilateralelectricdrive, shiftingbywire