关键词: 光纤定位　步进电动机　并行控制　望远镜, 分形, 摩擦, 微线段齿轮, 法向接触刚度

Abstract: The scheme of parallel control System for the 4 000 optical fiber of spherical focal plate for LAMOST (Large sky ?re? raulti-object fiber specttoscope telescope) is introduced. The double revolving optical fiber positioning unit device is designed. Then the overall control scheme of the positioning system is proposed. The raovement path of each unit is determined by the dynamic interfere analysis before each observation, the drive pulse data of each raotor is produced. The control system of pulse scanning method of multi-stepper motors is based on single ADSP-2181, so the movement path of the 4 000 unit is controlled precisely. The experiment result is satisfactory, the optical fiber can be positioned precisely and quicldy with the double revolving unit.

Key words: Optical fiber positioning Steppermotor Parallel control TeLescope, fractal, friction, Micro-segments gear, Normal contac stiffness