球形光电成像系统空间目标跟踪的转台控制

针对光电成像跟踪系统需要超大视场及高机械集成度以满足航空设备对重量和体积的特殊需求,采用球形步进电机作为光电成像跟踪转台的执行机构,提出一种空间目标跟踪的转台控制方法。首先将空间目标的位置转换为三维转动群的群元,群元采用四元数作为三维旋转的数据结构,然后构建转台在空间步进旋转的路径图,并设计在不同空间位置下的目标跟踪方法,仿真结果表明球形转台控制方法进行目标跟踪的有效性,转台可以较快地搜索到通往目标位置的最佳路径,从而实现目标跟踪,跟踪误差取决于目标的具体位置,同时光电传感器在系统存在扰动时进行重新定位有着重要的意义。

Controlling Turret for Tracking the Space Target in Spherical Optoelectronic Imaging System

Since the optoelectronic imaging tracking system requires extra large view range and highly mechanical integration to meet the especial demand for the weight and bulk of the aviatic equipment,spherical stepper motor is used for the executable part of the optoelectronic imaging tracking turntable in this paper,a kind of method on controlling the turret for tracking the space target is put forward. Firstly the space position of the target is converted to the element in 3-D rotation group,which uses quaternion to be the database for describing the 3-D rotation,and the stepper route graph of the turntable is drawn,the tracking method of the target in the different space position is then designed. The simulation results show that the controlling method on tracking the space target is effective,and the turntable could fast search the best route to the target position,which thus completes the target tracking,the tracking error lies on its actual position in space,and optoelectronic sensors would be indispensable when there is disturbance in the system and the space position is ascertained again.