| 摘要 |
A power drive unit for aircraft cargo handling systems that includes an electric motor and a drive roller mounted on for rotation about an axis parallel to the motor output shaft for engagement with cargo to be driven by the unit. A planetary gear differential and a torque control arrangement couple the motor output shaft to a self-erecting mechanism for lifting the unit into engagement with cargo, and to the drive roller for propelling the cargo. A scrub sensor is coupled to the drive roller for modulating application of electrical power to the motor when the drive roller is scrubbing against cargo engaged by the roller.
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