Tests for a dynamic absorber with tunable stiffness of rotor systems

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (9) : 80-85.

YAO Hongliang1, WANG Tongzhao1, CAO Yanbo1, WEN Bangchun1

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Abstract

To realize vibration suppression of a rotor system with variable rotating speed, a new type of dynamic absorber with tunable stiffness was proposed. The stiffness and natural frequency of the absorber could be adjusted with a variable stiffness mechanism composed of permanent magnets. Firstly, the structure of the absorber was designed, the dynamic equation of the rotor-absorber with a permanent magnet variable stiffness was established, and the working principle of the absorber was analyzed. Secondly, the rotor-permanent magnet tunable stiffness absorber test platform and its control system were built, a PID control program was compiled. Finally, the effectiveness test of the permanent magnet tunable stiffness mechanism, the validity test for frequency-sweeping and vibration reduction effect and the rotor constant speed control test were conducted on the test platform. The results showed that the tunable stiffness dynamic absorber designed can acquire vibration suppression effect.

Key words

tunable stiffness / dynamic absorber / permanent magnet / PID control

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YAO Hongliang1, WANG Tongzhao1, CAO Yanbo1, WEN Bangchun1. Tests for a dynamic absorber with tunable stiffness of rotor systems[J]. Journal of Vibration and Shock, 2018, 37(9): 80-85

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