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大口径光学经纬仪变焦距系统可以有效的满足大视场稳定捕获和高观测分辨力的要求。文章就变焦距系统的机械结构设计和电子控制方法进行了讨论。采用ADMAS动力学仿真软件对变焦距系统动力学进行建模,分析比较了电机驱动方案和凸轮曲线的设计。采用IXR补偿的稳速控制方案,实现了变力矩条件下的高精度控制。对大口径变焦距系统优化设计具有一定的参考意义。
Large-aperture optical theodolite zoom system can effectively meet the requirements of large-field stable capture and high observation resolution. The article discusses the mechanical structure design and electronic control of zooming system. The dynamics of zooming system was modeled by ADMAS dynamic simulation software, and the design of motor driving scheme and cam curve was analyzed and compared. The IXR compensation steady speed control scheme is adopted to realize high-precision control under variable torque conditions. It has certain reference meaning for the optimization design of large diameter zoom system.