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Philipp Löhler
Chair of Electric Components and Circuits, University of Duisburg-Essen, 47057 Duisburg, Germany

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Journal article
Published: 11 August 2021 in Actuators
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In recent years, tissue engineering with mechanical stimulation has received considerable attention. In order to manipulate tissue samples, there is a need for electromechanical devices, such as constant-force actuators, with integrated deflection measurement. In this paper, we present an electrostatic constant-force actuator allowing the generation of a constant force and a simultaneous displacement measurement intended for tissue characterization. The system combines a comb drive structure and a constant-force spring system. A theoretical overview of both subsystems, as well as actual measurements of a demonstrator system, are provided. Based on the silicon-on-insulator technology, the fabrication process of a moveable system with an extending measurement tip is shown. Additionally, we compare measurement results with simulations. Our demonstrator reaches a constant-force of 79 ± 2 μN at an operating voltage of 25 V over a displacement range of approximately 40 μm, and the possibility of adjusting the constant-force by changing the voltage is demonstrated.

ACS Style

Anna Christina Thewes; Philip Schmitt; Philipp Löhler; Martin Hoffmann. Design and Characterization of an Electrostatic Constant-Force Actuator Based on a Non-Linear Spring System. Actuators 2021, 10, 192 .

AMA Style

Anna Christina Thewes, Philip Schmitt, Philipp Löhler, Martin Hoffmann. Design and Characterization of an Electrostatic Constant-Force Actuator Based on a Non-Linear Spring System. Actuators. 2021; 10 (8):192.

Chicago/Turabian Style

Anna Christina Thewes; Philip Schmitt; Philipp Löhler; Martin Hoffmann. 2021. "Design and Characterization of an Electrostatic Constant-Force Actuator Based on a Non-Linear Spring System." Actuators 10, no. 8: 192.