二维转动平台装置是某可靠性试验设备的关键组件之一，通过其固定的平面反射镜的二维转动来模拟动目标的方位运动和俯仰运动。给出二维转动机构的设计方案，绘出此机构的结构图,在反射镜二维转动平台设计基础上，进行其闭环伺服系统的稳态设计，以便与机械系统参数匹配。通过对二维转动平台的运动特征进行分析，求出相应机构所需的负载转矩，以选择合适的执行电动机，并完成此闭环伺服系统的稳态设计。

The two-dimensional rotation platform is one of the important subassemblies of a certain reliability test equipment. The azimuthal and pitching movement of the moving target can be simulated by two-dimensional rotating of the reflector fixed on the rotation platform. The design of the two-dimensional rotation platform is offered, and its CAD diagram is drawn. The stable design of closedloop servo system was carried out to match its parameters of the mechanical system based on the design of two-dimensional rotation of the reflector. By the characteristic analysis for the movement of the two-dimensional rotation platform, the load torque corresponding with its construction was derived to select the appropriate operating motor and achieve its stable design of the closedloop servo system.