Comparison of Charge Estimators for Piezoelectric Actuators

Mohammadzaheri, Morteza and AlSulti, Sami and Ghodsi, Mojtaba and Soltani, Payam (2023) Comparison of Charge Estimators for Piezoelectric Actuators. In: 28th International Conference on Automation and Computing, 30th August -1st September 2023, Birmingham, UK.

2023162985.pdf - Accepted Version

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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.

Item Type: Conference or Workshop Item (Paper)
Identification Number:
16 May 2023Accepted
16 October 2023Published Online
Uncontrolled Keywords: piezoelectric, charge, actuator, capacitor, nanopositioning
Subjects: CAH10 - engineering and technology > CAH10-01 - engineering > CAH10-01-02 - mechanical engineering
CAH10 - engineering and technology > CAH10-01 - engineering > CAH10-01-08 - electrical and electronic engineering
Divisions: Faculty of Computing, Engineering and the Built Environment > College of Engineering
Depositing User: Morteza Mohammadzaheri
Date Deposited: 31 Aug 2023 13:03
Last Modified: 20 Jun 2024 11:50

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