A comparative study of vibration isolation performance using negative stiffness and inerter dampers

Xiang SHI, Songye ZHU

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)


Two types of passive devices, namely, negative stiffness damper (NSD) and inerter damper (ID), have been receiving growing interest in vibration isolation and suppression, because both can produce negative-slope force-displacement relationships that are similar to those associated with active control forces. Despite such a similarity, these two passive dampers possess obvious differences in their mechanical behaviors. This study aims to illustrate the similarity and difference between these two dampers in vibration isolation applications with respect to the H2 and H performance. The comparative study indicates that both dampers can reduce the H norm effectively; the negative stiffness devices can reduce the H2 norm as well, whereas the H2 norm cannot converge under the influence of inerter. This finding explains why a tuned-inerter damper, i.e., an inerter connected in series with a spring with proper frequency tuning, is more commonly adopted in vibration isolation. The pros and cons of both devices were further discussed.

Original languageEnglish
Pages (from-to)7922-7946
Number of pages25
JournalJournal of the Franklin Institute
Issue number14
Publication statusPublished - Sep 2019

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Computer Networks and Communications
  • Applied Mathematics

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