BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//talks.cam.ac.uk//v3//EN
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19700329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19701025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CATEGORIES:Engineering - Dynamics and Vibration Tea Time Talk
 s
SUMMARY:Towards Tristability in Electrostatically Actuated
  Micro-Meta-Structures - Professor Lior Medina\, T
 el Aviv University
DTSTART;TZID=Europe/London:20241025T160000
DTEND;TZID=Europe/London:20241025T170000
UID:TALK221206AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/221206
DESCRIPTION:Current micro-electromechanical systems(MEMS)based
  structures are either mono or bistable\, and as s
 uch are limited to registering one or two values i
 n mechanical sensors/memories/logical gates. Howev
 er\, with the entrance of AI and Internet-of-Thing
 s\, sensory input in integrated systems is expecte
 d to increase\, requiring systems to become more e
 fficient and autonomous. That entails sensing more
  values in a smaller footprint\, as well as posses
 sing basic computational abilities. To mitigate th
 at need\, a new type of a microstructure is requir
 ed\, that will introduce new abilities such as mul
 tistability\, non-volatility\, and reconfigurabili
 ty\, along with built-in memory and embedded compu
 tational abilities\, thus allowing the formation o
 f a new class of smart MEMS from which new sensors
  can be devised.\nThe first generation of such a s
 tructure is composed of an electrostatically actua
 ted double curved beam\, connected either by a rig
 id truss or an elastic spring\, essentially compos
 ing a simple micro-meta-structure. It is found tha
 t weakly coupled and geometrically different sub-s
 tructures can manifest global tristablility when i
 ntroduced to a nonlinear\, displacement-dependent\
 , electrostatic actuation whilst exhibiting bistab
 ility when under mechanical\, displacement-indepen
 dent\, load. The stability analysis and methodolog
 y is established first for strongly coupled double
  beam structures\, and is then used for the weakly
  coupled version. In addition\, it was found that 
 electrostatic tristability\, which includes static
 ally inaccessible stable branches\, can be manifes
 ted in different configurations and permutations\,
  while also showing the presence of a global latch
 ing point\, unattainable the strongly coupled coun
 terpart. It is shown that the energy method can be
  used to characterise the stability of the propose
 d metastructure\, while also revealing new abiliti
 es that can be manifested in a seemingly simple st
 ructure. Such findings can promote the usage of su
 ch structures in multi-valued MEMS devices\, promo
 ting further miniaturisation and decreased footpri
 nt.\n
LOCATION:JDB Seminar Room\, CUED
CONTACT:
END:VEVENT
END:VCALENDAR