Vibration control and crack propagation delay of a nonlinear cracked rotor
LIU Jun ,2, HU min1, Chen Jianen1,2, Wang Xiaofeng1,2
1.Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechanical System, Tianjin 300384, China;
2.National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,-Tianjin University of Technology, Tianjin 300384, China
Abstract:Aiming at a cracked rotor’s nonlinear vibration problems, taking a Jeffcott cracked rotor with nonlinear restoring forces of bearing and electromagnetic actuator as a study object, its vibration response was analyzed through simulation and tests.An electromagnetic actuator with a neural network PID controller was adopted to realize the active control for nonlinear vibration of the cracked rotor.Through comparing the neural network PID control method and the traditional PID control one with simulations, it was shown that the neural network PID control method has better control performance and resisting disturbance ability for the nonlinear cracked rotor system.The opening-closing characteristics of a crack were analyzed based on the theory of rotor dynamics.The effects of different parameters on crack propagation were studied with the numerical method to propose the method for effectively delaying crack propagation.
刘军1,2, 胡敏1,陈建恩1,2,王肖锋1,2. 非线性裂纹转子的振动控制与裂纹延缓的研究[J]. 振动与冲击, 2018, 37(21): 134-142.
LIU Jun,2, HU min1, Chen Jianen1,2, Wang Xiaofeng1,2 . Vibration control and crack propagation delay of a nonlinear cracked rotor. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 134-142.
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