BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Harnessing non-smooth dynamics for self-propelled gastrointestinal
  endoscopies with vibro-impact capsules - Prof. Yang Liu University of Exe
 ter
DTSTART:20250207T140000Z
DTEND:20250207T150000Z
UID:TALK226447@talks.cam.ac.uk
CONTACT:Burigede Liu
DESCRIPTION:The rectilinear motion of a capsule can be generated using a p
 eriodically driven internal mass interacting with the main body of the cap
 sule as a 'hammer' in the presence of external resistances. At resonance\,
  this 'hammer' enables the capsule to progress efficiently through complex
  environments without the need for external accessories. This simplicity i
 n mechanical design and control significantly reduces complications associ
 ated with traditional external propellers or fins. However\, as a non-smoo
 th system experiencing vibrations\, frictions\, and impacts\, the capsule 
 exhibits a rich variety of behaviours known as multistability\, where diff
 erent long-term behaviours co-exist for a given set of parameters. This ca
 n pose significant control challenges when specific attractors dominate th
 e dynamics inside the gut. This talk will discuss our journey from mathema
 tical modelling and numerical analysis to optimisation\, control\, experim
 ental validation\, and ex vivo testing. I will focus on the non-smooth dyn
 amics of the system and the fine-tuning of its parameters to optimise prog
 ression rate and force generation\, presenting both numerical and experime
 ntal results to demonstrate its feasibility in lower gastrointestinal endo
 scopies.
LOCATION:Oatley 1 Meeting Room\, Department of Engineering
END:VEVENT
END:VCALENDAR