FSRM - Cours: Smart Materials in Robotics and Microtechnology

Smart Materials in Robotics and Microtechnology

course photo

Objectifs du cours

Different stimuli cause some materials called "active", "smart" or "intelligent" to respond with a change in shape and/or in length. The output strain can then be used to introduce motion or dynamics into a system. Depending on the stimulus-response-direction an active materials device can be used as both actuator and sensor. The applied driving forces can be broadly classified into three categories: Electrical fields, thermal fields and magnetic fields. Common materials include electrostrictive and piezoelectric ceramics, shape memory alloys, magnetostrictive materials, and lectrorheological/magnetorheological fluids. A new class of electroactive polymers (EAP) emerged and start to find new applications in robotics and microtechnology due to their unique properties such as extremely large actuation strains. The course aims to get a better understanding of the different active materials field and their application to robotics and microtechnology.The course will start by introducing the working principles of the different smart materials. The different manufacturing methods and the best technologies to shape them to desired dimensions will then be covered. A comparison of the different active materials will be discussed revealing the advantages and limitations of each technology. Finally illustrative applications of the active materials will be presented. Part of the course will be taught by investigating into details different case studies. A special emphasis will be given to emerging technologies such as EAP.

Public cible

The course is structured to appeal to a wide range of R&D staff and engineers from companies as well as research institutes active in the design, development, and testing of new structures and devices.

Contenu

Classification of active materials
The Materials: The applied driving forces: electrical, thermal, and magnetic fields
Working principles of the different active materials (piezoelectric materials, electroactive polymers, magnetorheological/electrorheological fluids, shape memory alloys and magnetostrictive alloys).
Manufacturing processes specially adapted to each material.
Comparison between the different smart materials in terms of forces, strain, bandwidth,... and clearly identifying the advantages and drawbacks of each technology.
Applications to robotics and microtechnology.
Case studies

Enseignant(s)

Dr Moustapha Hafez, expert senior au CEA LIST, Grenoble, France. M. Hafez est responsable du Laboratoire Interfaces Sensorielles. Il est aussi Professeur chargé de cours à l’Ecole Polytechnique au Département de Mécanique ou il enseigne deux cours sur les matériaux actifs et la microrobotique. Ses axes de recherche sont les interfaces tactiles, l’haptique, la mécatronique et les matériaux actifs. Il est le co-inventeur de plus de 20 brevets et 50 publications dans des conférences internationales et des revues à comité de lecture.