自适应模糊控制器在模糊直接转矩中的应用

Application of Adaptive Fuzzy Controller to Fuzzy Direct Torque Control

本文设计了一种自适应模糊 PD型速度调节器 ,应用于模糊直接转矩控制系统。该调节器输出部分的比例因子可以根据速度的实时变化趋势经自适应调整机构的模糊规则库在线调整 ,使系统的速度响应更快 ,超调更小 ,稳态精度提高 ,受对象参数变化影响减小 ,改善了系统低速性能 ,解决了常规模糊控制器在控制过程中参数不变带来的问题 ,满足了异步电机模糊直接转矩控制系统响应速度快、稳态精度高、调速范围宽的要求。经仿真验证了本设计的有效性。

This paper presents an adaptive PD type fuzzy logic speed controller,which is applied to fuzzy direct torque control system.The output scaling factor is adjusted on line by fuzzy rules according to the current speed trend of the controlled process,which made system have faster speed corresponding,smaller overshoot,better steady state accuracy and object parameter variety made less influence in it than those of their corresponding conventional fuzzy logic controller.It improves the system performance in the condition of low speed.And soluted the problems which classical fuzzy controller brings to and satisfied the demand of fast response and steady state accuracy and wide range speed variety in the induction motor fuzzy direct torque control system.Simulation results demonstrate the effectiveness of the design.