19th Asia-Pacific Vibration Conference (APVC2021)

139 / 2021-03-31 13:02:57

Global state analysis and line spectrum control of nonlinear vibration isolation system

line spectrum control,basion of attraction,coexisting attractor,synchronous system,vibration isolation

By designing a strong nonlinear vibration isolation system and applying appropriate control, the spectrum can be reconstructed and the characteristic line spectrum can be weakened.

However, the coexistence of multiple attractors is common in nonlinear systems, and the effect of line spectrum reduction is closely related to the attractor of the system.

To this end, this paper proposes a attraction domain the new train of thought and applied to the synchronous control under the flexible foundation of nonlinear vibration isolation system, to the types of visual display coexistence attractor and amplitude and its change with parameters, while retaining some mapping theory is simple and easy to implement and accuracy of close to zero error, etc.

According to the effect of line spectrum reduction, the attraction region can be divided into four different regions, so as to provide guidance for the selection of favorable initial conditions in engineering practice.

In addition, the vibration isolation performance of different attractor regions is analyzed to verify that it is not affected by the control applied.