环形拼接太阳望远镜主镜控制系统的频率特性

Frequency Characteristics of Primary Mirror Control System in Segmented Ring Solar Telescope

建立了8 m环形拼接太阳望远镜(8-m-RST)的主镜控制系统的数字控制器模型。通过提取系统模型的频率特性参数,获得了采样周期、相对稳定性、积分增益与控制带宽之间的关系。引入脉动风干扰模型,通过仿真验证了主镜系统在平均风速较低的脉动风扰动影响下的性能。研究结果表明,8-m-RST的主镜控制系统稳定且控制带宽满足0.2 Hz的设计要求,能有效抑制2 m/s平均风速的干扰,对8-m-RST结构设计的改进、倾斜传感器和控制器的设计都有重要的参考价值。

The digital controller model of the primary mirror control system in an 8 m segmented ring solar telescope （8-m-RST） is established. The relationships between the sampling period, relative stability, integral gain and the control bandwidth are obtained by means of the extraction of the frequency characteristic parameters from the system model. In addition, with the introduction of a pulsed wind disturbance model, the performance of the primary mirror system under the disturbance of a pulsed wind with a low average speed is tested by simulation. The research results show that, the primary mirror control system in the 8-m-RST is stable and its control width meets the requirement of 0.2 Hz. Moreover, it can effectively suppress the disturbance from a wind with an average speed of 2 m·s-1. These results have important references to the structural improvement and the design of the tilt sensor and the controller in the 8-m-RST.