Tomáš Michálek: Closed loop control of position and orientation of arbitrarily shaped objects inside fluidic chambers based on dielectrophoretic actuation

After spending several months in Femto ST in Besancon, France, our doctoral student Tomáš Michálek is back in Prague, eager to share his research achievements. Everybody is welcome at the seminar start at 11:00 at K14 seminar room. The seminar will take 60 minutes.

Annotation: The talk will summarize results achieved during my four months lasting stay at FEMTO-ST in France. The project, I was working on, addressed one of the currently investigated topics related to the field of non-contact micromanipulation – closed loop control of position and orientation of arbitrarily shaped objects inside fluidic chambers based on dielectrophoretic actuation. At first, I will present the most significant part of the work being the control-oriented modeling of electrokinetic effects acting on arbitrarily shaped micro-objects. Then, I will briefly touch upon the hydrodynamical model as another essential ingredient enabling to predict the motion of the controlled micro-objects. I will describe the used experimental setup, show few experimental videos and make a comparison between the observations and model outcomes. Finally, I will present two control strategies for such system – one based on an inversion of the mathematical model using real-time optimization and the other utilizing a model obtained directly just from the identification measurements.