- Title
- Physical-model-based control of a piezoelectric tube for nano-scale positioning applications
- Creator
- Gawthrop, P. J.; Bhikkaji, B.; Moheimani, S. O. R.
- Relation
- Mechatronics Vol. 20, Issue 1, p. 74-84
- Publisher Link
- http://dx.doi.org/10.1016/j.mechatronics.2009.09.006
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2010
- Description
- Piezoelectric tubes exhibit a highly resonant mode of vibration which, if uncontrolled, limits the maximum scan rate in nano-scale positioning applications. Highly resonant systems with collocated sensor/actuator are often controlled using resonant shunt dampers. Unfortunately, in the configuration used here, this approach is not possible due the non-minimum phase property arising from the presence of a right-half plane zero. This problem is solved by: (i) interpreting the resonant shunt damper in the context of physical-model-based control (PMBC) and (ii) extending the PMBC approach to handle non-minimum phase systems. The resultant controller combines the physical insight of the resonant shunt damper with the ability to control the non-minimum phase piezoelectric tube. A digital implementation of the controller was experimentally evaluated and found to successfully eliminate the resonant mode of vibration during an accurate and fast scan using a piezoelectric tube actuator.
- Subject
- flexible structures; piezoelectric transducers; charge control; vibration control; bond graphs; physical-model-based control
- Identifier
- http://hdl.handle.net/1959.13/923355
- Identifier
- uon:9715
- Identifier
- ISSN:0957-4158
- Language
- eng
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