A digital charge control strategy for reducing the hysteresis in piezoelectric actuators: Analysis, design, and implementation

Zhong, Jianpeng; Nishida, Rina; Shinshi, Tadahiko

doi:10.1016/j.precisioneng.2020.10.006

Cited by 13 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since type II charge estimators may be implemented only as a digital system, these estimators are broadly referred as 'digital' charge estimators [40,46,47].…”

Section: Type Ii-charge Estimators With a Sensing Resistormentioning

confidence: 99%

Charge Estimation of Piezoelectric Actuators: A Comparative Study

et al. 2023

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

“…Since type II charge estimators may be implemented only as a digital system, these estimators are broadly referred as 'digital' charge estimators [40,46,47].…”

Section: Type Ii-charge Estimators With a Sensing Resistormentioning

confidence: 99%

Charge Estimation of Piezoelectric Actuators: A Comparative Study

et al. 2023

View full text Add to dashboard Cite

show abstract

“…It can be seen that a delta topology is formed between node4, node5, and node6, because of the added components. A delta-y transformation was implemented to facilitate the analysis, and the schematic is shown in Figure 6b, in which the impedances, denoted as Z 1 , Z 2 and Z 3 , were calculated with Equation (9). The circuit of the feedback network can be described by Equation (10), and the transfer function of β can be calculated by Equations ( 11)- (13).…”

Section: Design Of the Compensated Drivermentioning

confidence: 99%

“…It has characteristics of high resolution, fast response, high stiffness, little magnetic interference, and little heat generation, making piezoelectric ceramic advantageous over conventional actuators in precise applications [ 4 , 5 , 6 , 7 ]. Piezoelectric ceramic has been widely applied in many fields, such as fine machining, semiconductors, life sciences, and so on [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Stability Compensation Design and Analysis of a Piezoelectric Ceramic Driver with an Emitter Follower Stage

et al. 2023

View full text Add to dashboard Cite

Piezoelectric ceramic has been widely applied in many fields because of its characteristics, and the performance of piezoelectric ceramic is determined strongly by its driver. In this study, an approach to analyzing the stability of a piezoelectric ceramic driver with an emitter follower stage was presented, and a compensation was proposed. First of all, using the method of modified nodal analysis and loop gain analysis, the transfer function for the feedback network was analytically deduced, and the cause of the instability of the driver was found to be the pole composed of the effective capacitance from the piezoelectric ceramic and the transconductance from the emitter follower. Then, a compensation involving a novel delta topology composed of an isolation resistor and a second feedback path was proposed, and its function principle was discussed. Simulations showed a correspondence between the analysis and the effectiveness of the compensation. Finally, an experiment was set up with two prototypes, one with compensation, and the other without compensation. Measurements showed the elimination of oscillation in the compensated driver.

show abstract

“…Considering the similarities in the structure and materials between stacked PEAs and multilayer ceramic capacitors (MLCCs), the PEA can be regarded as a non-ideal capacitor and its equivalent model in the electrical domain can be represented using the commonly used MLCC series model [26], which is shown in figure 2 (a). In general, the insulation resistance R ins is effective at DC and low frequencies, and crucial in determining the transition frequency between the voltage and charge control modes of the PEAs [27]. On the contrary, the equivalent series inductance (ESL) L ESL tends to dominate at high frequencies.…”

Section: Power Dissipation and Temperature Rise Modelmentioning

confidence: 99%

“…The first part is due to control and measurement deviations. Based on the actual tests, the current error is usually less than 30 mA [27], and thus this resulting false power dissipation has little effect on the calculated results and can be ignored. The second part is the real power dissipation and can be estimated by equation (5).…”

Section: Power Dissipation Testmentioning

confidence: 99%

Liquid cooling of stacked piezoelectric actuators for high-power operation

2022

Self Cite

View full text Add to dashboard Cite

In this article, we propose a liquid cooling solution to reduce the temperature rise and expand the working range of stacked piezoelectric actuators (PEAs) for high-frequency and large-stroke operation. Based on an analysis and preliminary testing of the power dissipation and temperature rise, a specific liquid cooling solution for a single PEA is designed and its effectiveness is verified through experiments. To incorporate liquid cooling into a high-bandwidth fast steering mirror (FSM) system driven by PEAs, a compact and self-contained cooling unit is proposed and evaluated. Subsequent experimental results validate its effectiveness, but also show some deficiencies for this cooling solution. To further improve the cooling efficiency, two new coolants are adopted based on an analysis of the heat transfer coefficient, and a suitable direct liquid cooling solution is established. Experimental results show that the cooled PEA can operate continuously over 8 kHz with a peak-to-peak voltage of 100 V whilst its maximum temperature is restricted to around 40 ○C using this cooling solution. The reliability and coolant insulation properties have been verified by a 3-month long continuously operational test.

show abstract

A digital charge control strategy for reducing the hysteresis in piezoelectric actuators: Analysis, design, and implementation

Cited by 13 publications

References 19 publications

Charge Estimation of Piezoelectric Actuators: A Comparative Study

Charge Estimation of Piezoelectric Actuators: A Comparative Study

Stability Compensation Design and Analysis of a Piezoelectric Ceramic Driver with an Emitter Follower Stage

Liquid cooling of stacked piezoelectric actuators for high-power operation

Contact Info

Product

Resources

About