Active Balancing Control Method And Application For Rotor With Time-delay

Rotor unbalance is a major cause of rotor vibration.Rotor vibration has influence on the operation status and accuracy of machinery,which can lead to safety accidents and endanger the safety of the workers in severe cases.Compared with the traditional balancing technology,the active balancing technology of rotor can complete the balancing operation and suppress the vibration of the rotor without stopping the machine.However,there is time-delay in the active balancing process of rotor,and the time-delay can affect the active balancing control performance.In this thesis,the influence of time-delay is considered in the control process,and the active balancing control method of rotor is studied.The main contents of the thesis are as follows:Firstly,the dynamic model of active balancing control system with time-delay is established.Based on the dynamic model,an optimization model of control system for time-delay identification is constructed and an improved fruit-fly optimization algorithm for time-delay identification is proposed.The simulation results show that the optimization algorithm can identify the time-delay of the control system efficiently and accurately.Secondly,an improved Smith predictive control method for active balancing control of rotor with time-delay is proposed.According to the established dynamics model with time-delay,the Smith predictor is constructed to eliminate the influence of time-delay in the control system.The neuron PID control technology and fuzzy control technology are introduced to realize adaptive adjustment of the parameters and gain of the PID controller.The validity of the control method is verified by simulation.Thirdly,an active balancing control method based on LQR for rotor with time-delay is proposed.Based on the dynamic model,the integral transformation term is introduced to obtain the system dynamics model without time-delay,and the active balancing control law is designed.The simulation results show that the method can effectively reduce the vibration of rotor.Finally,according to the working principle of the motor-driven polar coordinate actuator,the overall design of the active balancing control system is carried out.The active balancing control system of rotor is designed to realize the active balancing control of rotor,including the design of hardware and software.