DC and Quasi-DC Acceleration Observation for Servosystems with Piezoelectric Accelerometers

Yu Sheng Lu*, Po Chen Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This paper presents two observers, which combine a piezoelectric accelerometer with a positional sensor that commonly exists in a servo system. The piezoelectric accelerometers have wide measurement bandwidth but cannot measure an acceleration's dc and quasi-dc components. The proposed observers can estimate dc and quasi-dc components of an acceleration, avoiding the piezoelectric accelerometers' drawback. In contrast to commonly used capacitive accelerometers, the proposed observers can produce wide dynamic bandwidth owing to the use of a piezoelectric accelerometer. Compared with existing acceleration observers, the proposed observers do not require a plant's model and are thus completely insensitive to model uncertainties. Moreover, the proposed observers do not directly differentiate the positional signal twice with respect to time and are thus more immune to positional sensor noise. The proposed observers are experimentally applied to a linear motion stage to investigate applicability and feasibility of the proposed schemes.

Translated title of the contribution具有壓電式加速規的伺服系統直流與準直流加速度觀測
Original languageEnglish
Pages (from-to)421-429
Number of pages9
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Issue number5
Publication statusPublished - 2022 Oct


  • Acceleration
  • Observer
  • Piezoelectric accelerometer
  • Servo system

ASJC Scopus subject areas

  • Mechanical Engineering


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