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Adaptively Controlled Polarization And Hysteresis Curve Tracing For Polymer Piezoelectrics (1 S/B)

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Polymer transducer under test

Short Description

In the fabrication of piezoelectric materials, a polarization step is required to create and maintain a permanent electric dipole moment in the crystal structure of the material. The polarization process typically involves applying a constant or alternating high electric field to the piezoelectric material over a period of time. This field creates an electric polarization in the material by reorienting the crystal structure and aligning the electric dipoles in the direction of the electric field.

To measure the success rate of the polarization process, the polarization of the material is plotted against the applied electric field. The frequency response of the applied signal results in a hysteresis-shaped curve that is used to evaluate the piezoelectric properties of the material.

Due to the high electric fields and often unknown material parameters, manual control of such devices can be difficult. The goal of this work is to develop a microcontroller-based strategy for polarization and testing of piezoelectric polymers. It also aims to design the digital architecture in such a way that later studies will allow ML-based control of the system.


The development of a digital architecture that enables ML-based control of polarization and testing can revolutionize the state of the art of polarization and measurement equipment in the piezoelectric industry.

Status: Available

Looking for 1 Semester/Bachelor students
Contact: Christoph Leitner


Analog Mixed Signal Design
High Voltage
PCB Design


20% Literature research
40% PCB Design
30% Microcontroller programming
10% Testing


Luca Benini

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Detailed Task Description

Hysteresis curve of a polymere transducer

The main objective of this work is to develop a microcontroller-based strategy for polarization and testing of piezoelectric polymers. The digital architecture is to be designed in such a way that ML-based control of the system is possible.


  • Familiarization with the literature and the analog design of the existing manually controlled system.
  • Creating a model for microcontroller-based system controls.
  • Developing software to run on the microcontroller in order to pilot the polarization process and track hysteresis curves
  • Testing of the developed control strategy on transducer samples
  • PCB design of the new system architecture
  • Testing of the complete system on transducer samples

Practical Details


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