To make an analysis on the output exists oscillation of inverter fuzzy control system, this paper focuses on the digital signal processor ( DSP), brings variable universe into fuzzy self-tuning PID control structure, and put forward a fuzzy serf-tuning PI double closed loop inverter controller based on variable universe, so as to achieve an online adaptive stretching changes of fuzzy universe. The emulation results show that under the circumstance of resistive load, this controller has a less output overshoot and stronger adaptability compared with the conventional PID controller, which has improved the steady-state accuracy and dynamic performance.%针对逆变电源模糊控制系统输出存在振荡的问题,以数字信号处理器(DSP)为核心,将可变论域思想引入模糊自整定PID控制结构中,提出一种基于可变论域的模糊自整定PI双闭环逆变电源控制器,实现了在线调整模糊论域的伸缩变化.仿真结果表明,阻性负载情况下,与常规PID控制器相比该控制器输出超调小、自适应能力强,提高了逆变电源系统的稳态精度和动态性能.
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