MA - Design and Implementation of Eddy Current Brake for Controlling the Damping Factor in a Vibrotactile Actuator Teststand
Offizieller Titel Deutsch
Official Titel English
Task Description / Aufgabenstellung
In the institute for mechatronics in mechanics (M-4) a test stand for the quantification of vibrotactile actuators was developed. Vibrotactile actuators are resonating actuators that oscillate in the vibrotactile frequency range. A type of vibrotactile actuator is the Linear Resonating Actuator (LRA). This type of actuator consists of a mass that resonates in a linear fashion with the help of an actuating force and an restoring force.
To quantify such actuators, a series of tests need to be conducted on them. These tests measure how the actuators impact their surrounding environment as well as how that surrounding environment influences these actuators back. These effects can be tested by operating these actuators on different environmental conditions.
To implement a known damping factor to the sytem an eddy current brake can be used. It is an effect of a magnetic field on an electrical circuit where the magnetic field induces a current that is swirling within the circuit. This principle is widely used for applying a braking effect to electrical circuits, for example it is used in ICE trains for braking.
The actuators can be mathematically modelled based on a configuration of masses, springs and dampers. To get higher precision in the measurements, a controlled damping factor for the vibrotactile actuator teststand should be implemented using the eddy current brake principle.
The results can then be verified by applying the eddy current brake to the system and measuring the damping factor. These results should cover the theory.
Tasks
Conduct a literature research on controlling eddy current brakes
Find a transfer function of the system with the eddy current brake
Development a control technique to have a continuous synchronsation between the induced current of the actuator and the eddy current
Implement the system in the teststand (maybe with the help of our technicians)
Verify the system by measuring the damping
Ansprechpartner / Contact person: @Ali El Nwegy & @Juliana Lüer
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Zeitplanung:
Checklist
Introduction / tour in M4
Urheberrechtsvereinbarung signed: https://www.tuhh.de/t3resources/sls/pdf/ZPA/Formulare_oeffentlich/Rechte_an_Abschlussarbeiten.pdf
if applicable: signed confidential agreement
official registration
Helpful links:
Document Upload Final Thesis / Dokumentenabgabe Abschlussdokument
File of final presentation / Dokumentenabgabe Abschlusspräsentation
Link for further files / Link für weitere Dokumente
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Institut für Mechatronik im Maschinenbau (iMEK), Eißendorfer Straße 38, 21073 Hamburg