| 摘要 |
The invention relates a servo-control unit for a load ( 2 ) driven in rotation by motorization means ( 1 ) connected to the Load by two reduction gears ( 3, 4 ) and comprising several sensors for measuring their movements It includes a prestressing motoring system ( 5 ) arranged between the two reduction gears ( 3, 4 ) so as to apply a positive and respectively a negative torque to each of the reduction gears. The prestressing system ( 5 ) is designed to apply a torque at any particular point of the operating field of the reduction gears and to introduce therein a variable prestressing level. The prestressing system ( 5 ) is a jack ( 14 ) driven by a motor ( 17 ) and co-operating with a rack or a screw-nut system ( 15 ). The invention is useful for motorization of a turret mounted on a vehicle. |
