Design and Experimental Study of a Rotor Unbalanced Self-recovery Actuator Based on Accurate and Stable Regulation of Ultrasonic Motors
The rotor unbalanced self-recovery actuator is an effective solution to suppress the unbalance vibration of the rotor system of rotating machinery in real-time because it can adjust the mass distribution inside the device in real-time and compensate the unbalance vector inside the rotor system by moving the synthetic vector generated by the counterweight.A self-recovery rotor imbalance actuator based on ultrasonic motor accurate and stable regulation is introduced for the vibration faults caused by mass imbalance in the coaxial cantilever dual rotor system,and the structural composition and basic working principle of the device are described in detail.Based on the structural characteristics of the coaxial cantilevered dual-rotor system,a finite element model of the dual-rotor-actuator system is established,and quantitative analysis of the dynamics characteristics is carried out,which the impact of the actuator designed for the system structure on the critical speed of the original rotor system is within 3％.The results show that the self-recovery rotor unbalance actuator can reduce the rotor unbalance vibration by 53％in 3.2 s,which verifies the feasibility and effectiveness of the principle of the actuator.
dual-rotor systemunbalanced self-recoverydynamic characteristic analysisultrasonic motor
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