Non-symmetrical semi-active vibration control based on synchronized switching damping

Hongli Ji, Jinhao Qiu, Jin Zhang, Hong Nie, Li Cheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


An unsymmetrical switch circuit is designed for semi-active control method based on synchronized switching damping principle of piezoelectric actuators. A bypass capacitor and an additional switch are used to realize unsymmetrical bipolar voltage. The control logic of the switches is introduced in detail and the switched voltages, which directly influence the control performance, are derived as functions of the vibration amplitude and the outputs of the voltage sources. Simulations were carried out to verify the design circuit and the theoretical results of the switched voltage. The voltage ratio increases with increasing bypass capacitance, but its increasing rate decreases. The results show that large bypass capacitor is needed to realize a voltage ratio of 3, which is common in some piezoelectric actuator such as MFC.
Original languageEnglish
Title of host publicationActive and Passive Smart Structures and Integrated Systems 2014
ISBN (Print)9780819499837
Publication statusPublished - 1 Jan 2014
EventActive and Passive Smart Structures and Integrated Systems 2014 - San Diego, CA, United States
Duration: 10 Mar 201413 Mar 2014


ConferenceActive and Passive Smart Structures and Integrated Systems 2014
Country/TerritoryUnited States
CitySan Diego, CA


  • Non-symmetrical circuit
  • Piezoelectric elements
  • Semi-active control
  • Synchronized switch damping

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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