Active Vibration Isolation Via Nonlinear Velocity Time-Delayed Feedback

  • Xue Gao
  • Qian Chen
Conference paper


This paper combines cubic nonlinearity and time delay to improve the performance of vibration isolation. By the multi-scale perturbation method, the average autonomous equations are first found to analyse local stability. Then with the purpose of obtaining the desirable vibration isolation performance, stability conditions are obtained to find appropriate the feedback parameters including gain and time delay. Last, the influence of the feedback parameters on vibration transmissibility is assessed. Results show that the strategy developed in this paper is practicable and feedback parameters are significant factors to alter dynamics behaviours, and more importantly, to improve the isolation effectiveness for the bilinear isolation system.


Active control Cubic velocity feedback Local stability Piecewise bilinear Stability boundary Time delay Vibration isolation 


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.State Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjingChina

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