Numerical Method and Laboratory Experiment of RC Circuit using Raspberry Pi Microprocessor and Python Interface

Sanjaya, W. S. Mada; Anggraeni, Dyah; Sambas, Aceng; Denya, Rena

doi:10.1088/1742-6596/1090/1/012015

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…In addition, when determining the speed of the system, one of the important indicators of the response speed will be the capacity of the control elements. Since the control element of actuator-type deformable mirrors is actually a piezoelectric capacitor, to control the charge and discharge of this capacitor, it is necessary to use the concept of an RC circuit, which shows the time during which the piezoceramic element has time to charge/discharge by 63% [81] of the initial voltage applied to change the length of the piezoplate or piezostack (the magnitude of the applied voltage does not affect the charge rate of the capacitor). Therefore, from the point of view of control theory, it is reasonable to use deformable mirrors with a lower value of the capacitance of the control elements.…”

Section: Resultsmentioning

confidence: 99%

Investigation of PZT Materials for Reliable Piezostack Deformable Mirror with Modular Design

Toporovsky,

Samarkin,

Kudryashov

et al. 2023

Micromachines

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This article presents a study of the electrophysical properties of a piezoceramic material for use in adaptive optics. The key characteristics that may be important for the manufacturing of piezoelectric deformable mirrors are the following: piezoelectric constants (d31, d33, d15), capacitance, elastic compliance values s for different crystal directions, and the dielectric loss tangent (tgδ). Based on PZT ceramics, the PKP-12 material was developed with high values of the dielectric constant, piezoelectric modulus, and electromechanical coupling coefficients. The deformable mirror control elements are made from the resulting material—piezoceramic combs with five individual actuators in a row. In this case, the stroke of the actuator is in the range of 4.1–4.3 microns and the capacitance of the actuator is about 12 nF.

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Section: Resultsmentioning

confidence: 99%