针对交流伺服系统的特点和要求，研究和设计了一种基于遗传算法的自寻优位置模糊控制器。该设计利用实时仿真系统，并采取遗传算法实现了在线模糊控制参数的自动寻优，有效地解决了伺服系统精度和快速特性的问题。实验证明该系统性能良好。关键词：伺服系统；模糊控制；遗传算法；实时仿真Abstract: Aim at the characteristics of an AC servo system, a new auto-optimized fuzzy controller based on genetic arithmetic was developed. Fuzzy control parameters auto-optimizing is realized using the real-time simulation system based on GA. It solves effectively the problem between the precision and the rapidity in an AC servo system. The results of experiments demonstrated that the system performances are good.Key words: Servo system；Fuzzy control；Genetic arithmetic；Real-time simulation