| 主权项 |
1. A variable camber system for an aircraft, comprising:
a variable camber trim unit (VCTU) positioned between an inboard device and an outboard device mounted to at least one of a leading edge and a trailing edge of a wing, and including:
a speed sum gearbox including:
a sun gear coupled to an inboard shaft and surrounded by a plurality of planet gears, the planet gear supported on a carrier coupled to an outboard shaft, the planet gears engaged to an internal side of a ring gear, an external side of the ring gear engaged to a motor shaft, the inboard shaft coupled to the inboard device, the outboard shaft coupled to the outboard device, the speed sum gearbox configured such that if one of the inboard shaft, the outboard shaft, and the motor shaft is held stationary and prevented from rotating, the remaining pair of shafts rotate under the driving force of one of the remaining shafts of the pair;a VCTU electric motor engaged via the motor shaft to the speed sum gearbox and being selectively operable in conjunction with the speed sum gearbox to rotate the outboard shaft independent of the inboard shaft in a manner causing the outboard device to be actuated independent of the inboard device; a central motor coupled to the inboard device; and the speed sum gearbox is configured such that when the outboard device is stationary and the central motor drives the inboard device, the VCTU electric motor is back-driven. |
