7.2.2 - Modelling of Moving Magnet Actuators for Haptic Sensing Applications
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Physical Sensors
- Author(s)
- S. Lang, A. O. Niedermayer, J. Astl, D. Spira, B. Jakoby - Johannes Kepler University Linz,Linz (Austria)
- Pages
- 230 - 231
- DOI
- 10.5162/eurosensors2026/7.2.2
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
Haptic feedback is a key component of human interface devices as it allows for intuitive interaction. A common way to give haptic feedback is via vibrations, depending on either the user’s inputs or the state of the device. One difficulty of such devices, vibration actuators in particular, is the influence of the outside environment on the actuator’s performance. In this work, we show a way to model how the coupling of the outside environment affects the impedance response of a moving magnet actuator for haptic vibrational feedback and to, in turn, extract the properties of the actuator’s surroundings. To achieve this, we derived an electrical equivalent circuit from a linear two-degree-of-freedom mechanical model and calculated the resulting electrical impedance of the actuation coil. After calibration, impedance spectra were measured in different user scenarios, and the contributions to the impedance which are related to the environment (e.g., the user’s hands) were extracted, showing the possibility to measure the characteristics of a surrounding system via the impedance spectrum.