Study on Displacement Self-Sensing of Piezoelectric Actuator

Abstract:

Article Preview

This paper aims to make piezoelectric ceramic actuator self-sense its own displacement in the absence of independent sensor. It is derived from the basic piezoelectric equation that the free charge on the wafer of piezoelectric ceramic actuator contains displacement information. So a displacement self-sensing method based on integrate circuit is presented. Voltage driving circuit for the piezoelectric ceramic actuator and integrated circuit for gathering free charge are designed. Based on the proposed compound circuits, the actuator can sense its own displacement while actuation. It is convenient to adjust the circuit and easy to acquire sensitive signal by using this method, and the impedance mismatching problem met in bridge method is overcome. The experimental results show that piezoelectric self-sensing actuator can effectively measure its displacement signal under the conditions of different wave form of driving voltage and different driving voltage frequency.

Info:

Periodical:

Edited by:

Shen Dong and Yingxue Yao

Pages:

240-245

Citation:

Y.G. Cui et al., "Study on Displacement Self-Sensing of Piezoelectric Actuator", Key Engineering Materials, Vol. 339, pp. 240-245, 2007

Online since:

May 2007

Export:

Price:

$38.00

[1] S.M. Yang and J.S. Chin: Smart Mater. Struct., Vol. 3 (1994), p.248.

[2] J.J. Dosch, D.J. Inman and E. Garcia: J. Intel. Mat. Syst. Str., Vol. 3 (1992), p.166.

[3] J.S. Vipperman: AIAA Journal, Vol. 39 (2001), p.1822.

[4] J.F. Andrew and M. S.O. Reza: IEEE T. Contr. Syst. T., Vol. 13 (2005), p.98.

[5] Y.L. Fang and Z. Wu: Journal of Beijing University of Aeronautics and Astronautics, Vol. 26 (2000), p.87.

[6] W.J. Dong, B.Y. Sun, Y.G. Cui and Z. X. Yang: Journal of Dalian University of Technology, Vol. 41 (2001), p.77.

[7] H. Guckel, T. Earles and J. Klein: Sensor. Actuat. A-Phys., Vol. 53 (1996), p.386.

[8] Y.G. Cui, in: Study on Piezoelectric Ceramic Self-Sensing Actuators and the Control Method of Micro-Motion Worktable Driven by It (A Dissertation Submitted to Dalian University of Technology for the Degree of Doctor of Philosophy in Engineering, chapter 5, 2004).

[9] F.X. Zang and L.K. Wang, in: Modern Piezoelectricity (Book 2, chapter 12, Science Publishers 2002).