用自适应控制改善天文望远镜低速性能的仿真研究

SIMULATION STUDY OF ADAPTIVE CONTROLFOR IMPROVING THE LOW-SPEED PERFORMANCEOF THE TRACKING SYSTEM FOR ASTRONOMICALTELESCOPE

笔者针对一架中型射电望远镜,建立了一个由微型计算机和模拟计算电路组成的混合仿真系统,通过实时仿真实验,研究了应用数字自适应控制技术改善地平装架天文望远镜低速性能的实际方法。结果表明:(1)采用适当的数字自适应控制器,能够基本消除望远镜系统的低速死区,使系统的速度精度提高约四倍;(2)用八位单板计算机来实现模型参考自适应控制器是现实可行的。

A real time hybrid simulation using a microcomputer and an analog circuit was performed for studying the improvement of the low-speed performance of the tracking system for an altazimuth mounting astronomical telescope The model reference adaptive technique was applied to this real time simulation of control, The experiment indicated:1. By applying the model reference adaptive technique, the rms error in angular velocity can be reduced to 1/4 of that value for a non-adaptive system.2. The implementation of the model reference adaptive control system by a 8 bit single board computer is feasible,