大射电望远镜AB轴机构指点运动与误差分析
Motion and Pointing Error of AB-Axis Mechanism for Large Radio Telescope

提出了用公法线长度和正交误差两个参数描述实际AB轴机构主要误差的方法,引入6套坐标系的连续变换,导出了包含公法线长度和正交误差在内的实际AB轴的运动方程。按照这一运动方程,可使有误差的AB轴机构仍指向期望的目标点。通过算例分析了产生指点误差的主要参数,为研制高精度AB轴机构奠定了理论基础。
The common normal line length and the orthogonal error are presented to describe the errors of actual AB-axis mechanism in this paper, the motion equation of actual AB-axis with these two errors is established by the six set continuous coordinate transformations. According to those equations, actual AB-axis mechanism will accurately point to the desired target point. Through an example the main errors to cause pointing error are analyzed, so that the theoretical foundation for the development of high precision AB-axis mechanism is laid