System-Level Modeling of a Cooperative Microactuator with Free Particle Movement

Conference: MikroSystemTechnik Kongress 2021 - Kongress
11/08/2021 - 11/10/2021 at Stuttgart-Ludwigsburg, Deutschland

Proceedings: MikroSystemTechnik Kongress 2021

Pages: 4Language: englishTyp: PDF

Olbrich, Michael; Ament, Christoph (University of Augsburg, Chair of Control Engineering, Germany)
Schuetz, Arwed; Bechtold, Tamara (Jade University of Applied Sciences, Research Group for Modelling and Simulation of Mechatronic Systems, Germany)

Over the last years, a considerable effort in enlarging the operational range of microactuators has been made. An important part of this research includes new concepts without mechanical connections limiting the motion of the actuator. Within the project “Kick and Catch” (, we therefore investigate concepts for microactuators where small objects can be moved freely within a large working range. In this work, we present an actuator allowing free vertical movements of a magnetic particle, which can be kept levitating at predefined resting positions without energy input. For efficient transitions between these equilibria, a cooperative mechanism between a piezoelectric chip actuator and controlled electromagnets is deployed. In order to design component dimensions and controller architectures, a dynamical model is derived, which allows simulation demonstrating the working principle and the efficiency of the nonlinear feedback controller.