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Martedì 9 settembre si terrà un seminario presso l’aula Fassò (Edificio 4A) dalle ore 16:30 dal titolo “Chaotic regime in micromechanics: generation, characterization and applications”.

Il seminario sarà tenuto dal Dr. Martial Defoort, University of Grenoble Alpes, CNRS, Grenoble INP, TIMA, Grenoble.

Sarà anche possibile seguire il seminario da remoto tramite il seguente link: https://politecnicomilano.webex.com/meet/valentina.zega

Abstract
Micromechanical systems have become essential in the development of the latest technologies, from cars to smartphones to medical implants. Due to their size, these devices offer fast response times, low power consumption, and high sensitivity, creating a buzz in both academic and industrial research. This ambivalence creates a direct bridge between fundamental research and engineering science, exploiting complex behaviors for specific applications. This is the case for nonlinear phenomena, often considered undesirable, but which also offer new perspectives and give rise to disruptive applications.

This presentation will focus on one nonlinear phenomenon in particular: the chaotic regime in mechanical microresonators. After a general introduction to chaos and its generation in microtechnologies, a second part will be dedicated to the experimental characterization of this regime within a microelectromechanical system (MEMS) in order to assess the richness of the chaos thus generated. The final part of this presentation will discuss the various possible applications, from improving transducer performance to secure communications.

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Speaker’s bio
Martial Defoort completed his doctoral studies in fundamental research at Intitut Néel, Grenoble, in 2014 on nonlinear micro/nanomechanics. He then pursued postdoctoral research at the University of California, Davis, focusing on applied research and in particular synchronization of MEMS gyroscopes. Coming back to France, he obtained a postdoctoral position at CEA-Léti, where he explored NEMS-arrays for mass spectrometry applications. In 2020, he joined the laboratory Techniques de l’Informatique et de la Microélectronique pour l’Architecture de systèmes intégrés (TIMA) in Grenoble as a CNRS research scientist, specializing in nonlinear physics, MEMS and chaos-based applications. In particular, he focuses his research on how to leverage chaos properties in MEMS for sensing and security applications.

Il prossimo appuntamento con la serie di incontri PhDTalks si terrà Martedì 12 novembre nell’aula Fassò (Edificio 4A), dalle 17:15 alle 18:30 CET.

PhDTalks è una serie di seminari e discussioni tra dottorandi. Gli eventi hanno lo scopo di fornire un luogo dove creare un network tra dottorandi ed entrare in contatto con i molti progetti sviluppati nel nostro dipartimento.

Lo speaker Yassine Banani condurrà un seminario dal titolo “Innovative Inertial MEMS: Micro-Systems for Motion Detection for New Fabrication Process”. 

Al termine dell’evento sarà disponibile un piccolo rinfresco finanziato dal dipartimento.

Sarà possibile seguire la conferenza anche online al seguente link.

Abstract

Navigation in environments without external references -such as open oceans or airspace above clouds- requires devices that can measure motion without the need to communicate directly with the outside world. This problem has found a solution in devices based on MEMS (Micro-Electro-Mechanical Systems) technology. In particular, MEMS inertial sensors are now the most widely used option for accurately and reliably measuring accelerations and changes in orientation of an object in space. Due to their ability to detect motion and changes in orientation without the need for GPS signal or other external systems. MEMS devices are increasingly being applied in various fields, from air and sea navigation to autonomous vehicles. In this presentation we propose innovative devices that take advantage of a new fabrication process to achieve high performance and reliability in measurements.

Speaker’s bio

Yassine holds an MSc in Civil Engineering from Politecnico di Milano, in 2020. He is currently a PhD candidate in Structural, Seismic and Geotechnical Engineering (38th cycle). His research focuses on the design and numerical simulation of innovative MEMS(Micro-Electro-Mechanical Systems) sensors and actuators for a new fabrication process.

In his free time, he enjoys reading, traveling with friends and eating pasta.

La Professoressa Valentina Zega è stata insignita dell’IEEE Sensors Council Technical Achievement Award – Early Career per i suoi contributi ai sensori inerziali MEMS.

Il Premio per l’Innovazione Tecnica del IEEE Sensors Council viene assegnato a chi ha offerto contributi tecnici di eccezionale rilevanza nell’ambito del IEEE Sensors Council, documentati da pubblicazioni e brevetti. Il riconoscimento si basa sulla qualità complessiva e sull’originalità dei contributi.

Il nostro prossimo appuntamento con il Seminario PhDTalks si svolgerà martedì 26 aprile 2022 nell’aula 5.1.1 dalle 18:15 alle 19:15 CET.

PhDTalk è una serie di seminari e discussioni tra dottorandi. Gli eventi hanno lo scopo di fornire un luogo dove creare un network tra dottorandi ed entrare in contatto con i molti progetti sviluppati nel nostro dipartimento.

Lo speaker Andrea Opreni ci parlerà di “Designing MEMS in Seconds using Invariant Manifolds”.

Abstract:

Numerical simulations of MEMS are expensive and often not adequate to predict their dynamic response since the computational requirements are too demanding. As a consequence, model order reduction methods are necessary to correctly design such systems. In this talk we will discuss major problems associated to model order reduction of nonlinear vibrating systems with focus on a novel technique called the direct parametrization method for invariant manifolds.

L’evento sarà in presenza presso l’aula 5.1.1, Politecnico di Milano, Piazza Leonardo da Vinci, 42, 20133 Milano.
Al termine dell’evento sarà disponibile un piccolo rinfresco finanziato dal dipartimento.

Se sei interessato a presentare durante uno di questi eventi, invia una e-mail a andrea.opreni@polimi.it se fai parte del programma ISSG oppure a chiara.recalcati@polimi.it se stai frequentando il programma IAI.