TY - CHAP
T1 - Comparison of Charge Estimators for Piezoelectric Actuators
AU - Mohammadzaheri, Morteza
AU - Alsulti, Sami
AU - Ghodsi, Mojtaba
AU - Soltani, Payam
N1 - Publisher Copyright:
© 2023 IEEE.
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PY - 2023/8/30
Y1 - 2023/8/30
N2 - This article deals with charge estimators for piezoelectric actuators. Two most recent/effective types of these estimators employ either a sensing capacitor (type I in this paper) or a sensing resistor (type II); the latter (and the newer) one is widely called digital charge estimator. There are experimental results in the literature indicating that, with the same waste of voltage, significantly higher amount of charge can be estimated with a type II estimator compared to a type I one; thus, the superiority of type II estimators has been professed. In order to re-assess this conclusion, this paper even-handedly compares type I and II estimators through analytical modelling and experimentation. The results show that types II estimators only have an insubstantial advantage in estimating higher amount of charge, if both type I and II estimators are designed pertinently. On the other hand, the resistance of type II estimators needs to tuned to deal with different excitation frequencies. This research concludes that capacitor-based charge estimators of piezoelectric actuators, with proper design and implementation, can be still the right solution for many problems despite the claims in the literature in the last decade.
AB - This article deals with charge estimators for piezoelectric actuators. Two most recent/effective types of these estimators employ either a sensing capacitor (type I in this paper) or a sensing resistor (type II); the latter (and the newer) one is widely called digital charge estimator. There are experimental results in the literature indicating that, with the same waste of voltage, significantly higher amount of charge can be estimated with a type II estimator compared to a type I one; thus, the superiority of type II estimators has been professed. In order to re-assess this conclusion, this paper even-handedly compares type I and II estimators through analytical modelling and experimentation. The results show that types II estimators only have an insubstantial advantage in estimating higher amount of charge, if both type I and II estimators are designed pertinently. On the other hand, the resistance of type II estimators needs to tuned to deal with different excitation frequencies. This research concludes that capacitor-based charge estimators of piezoelectric actuators, with proper design and implementation, can be still the right solution for many problems despite the claims in the literature in the last decade.
KW - actuator
KW - capacitor
KW - charge
KW - nanopositioning
KW - piezoelectric
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UR - https://www.mendeley.com/catalogue/32f8a7e8-15cc-37a9-8cab-9823caa3e180/
U2 - 10.1109/icac57885.2023.10275160
DO - 10.1109/icac57885.2023.10275160
M3 - Chapter
AN - SCOPUS:85175532074
SN - 9798350335859
T3 - ICAC 2023 - 28th International Conference on Automation and Computing
SP - 1
EP - 6
BT - ICAC 2023 - 28th International Conference on Automation and Computing
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th International Conference on Automation and Computing, ICAC 2023
Y2 - 30 August 2023 through 1 September 2023
ER -