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

[[Image:PvdfTestbench.jpg|thumb| 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'''.

==Relevance==
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: [[:User:Cleitne | Christoph Leitner]]

===Prerequisites===
: Analog Mixed Signal Design
: High Voltage
: PCB Design
: Microcontrollers
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===Status: Completed ===
: Fall Semester 2014 (sem13h2)
: Matthias Baer, Renzo Andri
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===Status: In Progress ===
: Student A, StudentB
: Supervision: [[:User:Cleitne | Christoph Leitner]], [mailto:marco.giordano@pbl.ee.ethz.ch Marco Giordano (PBL)]
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===Character===
: 20% Literature research
: 40% PCB Design
: 30% Microcontroller programming
: 10% Testing

===Professor===
: [http://www.iis.ee.ethz.ch/people/person-detail.html?persid=194234 Luca Benini]
<!-- : [https://iis.ee.ethz.ch/people/person-detail.MjkyNDgw.TGlzdC8xOTgzLDk5MDE4ODk4MA==.html Hua Wang] --->
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<!-- : [https://ee.ethz.ch/the-department/faculty/professors/person-detail.OTY5ODg=.TGlzdC80MTEsMTA1ODA0MjU5.html Christoph Studer] -->
<!-- : [http://www.iis.ee.ethz.ch/people/person-detail.html?persid=79172 Andreas Schenk] --->

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==Detailed Task Description==
[[Image:PvdfHysteresis.png|thumb| 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.

===Goals===
* 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===
* '''[[Project Plan]]'''
* '''[[Project Meetings]]'''
* '''[[Design Review]]'''
* '''[[Coding Guidelines]]'''
* '''[[Final Report]]'''
* '''[[Final Presentation]]'''

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==Links== 

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