Synchronization and stability of an elastically coupled tri-rotor vibration system
Yongjun Hou 1  
,   Mingjun Du 1,   Pan Fang 1,   Liping Zhang
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School of Mechanical Engineering, Southwest Petroleum University, Chengdu
Publication date: 2017-01-21
Journal of Theoretical and Applied Mechanics 2017;55(1):227–240
A new mechanism, an elastically coupled tri-rotor system, is proposed to implement synchronization. It is composed of a rigid body, three induction motors, coupling unit and springs. According to the Lagrange equation, the model of the system is established. The average method of small parameters is applied to study the synchronization characteristics of the system, therefore, the balance equation and stability criterion of the system can be obtained. Obviously, many parameters affect the synchronous state of the rotors, especially the spring stiffness, the stiffness of the coupling unit and the installation location of the system. Finally, computer simulations are used to verify the correctness of theoretical analysis.