| 摘要 |
#CMT# #/CMT# The actuator has a connecting shaft (6) mounted on an output shaft (2) that is carried by an inner ring of a bearing e.g. ball bearing. The bearing has an outer ring (3) that is rotatably connected to a circular rim (1) of a space equipment e.g. satellite. An adjustable stop (5) is fixed to the ring (3) and co-operated with the shaft (6) to angularly limit the rotation relative to the rings, where rate of rotation of the shaft (2) in response to a displacement of an input unit i.e. belt (10), is different such that the shaft is in/not in support against the stop. #CMT#USE : #/CMT# Actuator for rotatably driving a movable element e.g. antenna and pylon, positioning device e.g. end pointing device, of a guiding device that is utilized for guiding a space equipment (claimed) e.g. satellite and space vehicle, for orienting the element of the equipment in a predetermined direction to direct towards a fixed star, to aim towards a point at a surface of earth and to scan a particular zone at the surface of the earth or a star. #CMT#ADVANTAGE : #/CMT# The actuator ensures precise positioning of movable element of the equipment. The actuator generates the angular movement of high amplitude, for deployment phase and the movement of low amplitude for pointing phase. The actuator ensures the movement of the element without using the bearing and without making the rotatable parts to come in contact between them, thus avoiding the lubrication of the parts of the equipment, and hence improving the life duration of the pointing device. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a front view of a positioning device powered by an actuator. 1 : Circular rim 2 : Output shaft 3 : Outer ring 5 : Adjustable stop 6 : Connecting shaft 10 : Belt. |
