摘  要：为了抑制超声波电机转速控制系统中的混沌行为，设计了比例延时反馈控制器，采用基于模糊逻辑的方法在线自适应调节延迟时间。结果表明，该方法可以快速有效地将超声波电机转速控制系统的混沌行为稳定为周期或固定点运动，使系统从混沌状态进入稳定状态，从而实现混沌控制。
关键词：超声波电机；模糊逻辑；延时反馈；混沌控制

Abstract: Proportion-delayed feedback controller was designed to control or suppress chaos in USM control system. Arithmetic of fuzzy logic was used to adaptively adjust the delay time online. Simulation results showed that this method could fast and effectively change the chaos movement into periodic or fixed-point movement and make the system into stable state from chaos state. Finally the chaos behavior was controlled.
Key words: ultrasonic motor; fuzzy logic; delayed feedback; chaos control