Assessment of Capacitor-based Charge Estimators for Piezoelectric Actuators

Mohammadzaheri, Morteza; AlSulti, Sami; Ghodsi, Mojtaba; Bahadur, Issam; Emadi, Mohammadreza

doi:10.1109/icm46511.2021.9385677

Cited by 3 publications

(1 citation statement)

References 34 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experiments have demonstrated that the position of a piezoelectric actuator is proportional to its electric charge for an extensive operating area [21][22][23]. Therefore, a charge estimator can replace a costly and troublesome accurate position/displacement sensor; this motivates research on charge estimation for piezoelectric actuators [24,25].…”

Section: Introductionmentioning

confidence: 99%

Charge Estimation of Piezoelectric Actuators: A Comparative Study

et al. 2023

Self Cite

View full text Add to dashboard Cite

This article first reviews the position control of piezoelectric actuators, particularly charge-based sensorless control systems, which often include a charge estimator as a key component. The rest of the paper is about charge estimators for piezoelectric actuators. Two of the most recent/effective types of these estimators utilise either a sensing capacitor (type I in this paper) or a sensing resistor (type II); the latter (and the newer) type is broadly known as a digital charge estimator. Some experimental results in the literature show that, with the same loss in excitation voltage, a considerably higher amount of charge can be estimated with a type II estimator in comparison with a type I estimator; therefore, the superiority of type II estimators was acknowledged. In order to re-assess this conclusion, this paper equitably compares type I and II estimators through analytical modelling and experimentation. The results indicate that type II estimators have only a slight advantage in estimating higher amounts of charge, if both type I and II estimators are designed appropriately. At the same time, type II estimators have disadvantages; e.g., the resistance of type II estimators has to be tuned to suit different excitation frequencies. This research concludes that capacitor-based (type I) charge estimators for piezoelectric actuators, with pertinent design and implementation, can be still the prime solution for many charge estimation problems despite claims in the literature in the last decade.

show abstract

Section: Introductionmentioning

confidence: 99%

Charge Estimation of Piezoelectric Actuators: A Comparative Study

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Comparison of Charge Estimators for Piezoelectric Actuators

Mohammadzaheri,

AlSulti,

Ghodsi

et al. 2023

2023 28th International Conference on Automation and Computing (ICAC)

View full text Add to dashboard Cite

Digital Charge Estimation for Piezoelectric Actuators

Mohammadzaheri

Ziaiefar

Ghodsi

2022

Handbook of Research on New Investigations in Artificial Life, AI, and Machine Learning

View full text Add to dashboard Cite

For many piezoelectric actuators and their areas of operating, charge is proportional to the position of the actuator. Thus, for such actuators, estimation of charge is largely considered as an equivalent to position estimation. That is, a charge estimator may replace a position sensor. Nevertheless, a significant portion of the excitation voltage is wasted for charge estimation. This voltage, not used to deform the actuator, is called voltage drop. A class of charge estimators of piezoelectric actuators have a resistor in series with the actuator and can only work together with a digital processor. These are called digital charge estimators and have been shown to witness the smallest voltage drop compared to other charge estimators. This chapter first proposes a design guide for digital charge estimators of piezoelectric actuators to maximise the accuracy with the smallest possible voltage drop. The chapter then details the use of five different artificial intelligence (AI) techniques to tackle this design problem and assesses their effectiveness through even-handed comparison.

show abstract

Assessment of Capacitor-based Charge Estimators for Piezoelectric Actuators

Cited by 3 publications

References 34 publications

Charge Estimation of Piezoelectric Actuators: A Comparative Study

Charge Estimation of Piezoelectric Actuators: A Comparative Study

Comparison of Charge Estimators for Piezoelectric Actuators

Digital Charge Estimation for Piezoelectric Actuators

Contact Info

Product

Resources

About