Eddy-Current Linear-Rotary Position Sensor for an Implantable Total Artificial Heart
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Date
2022Type
- Conference Paper
ETH Bibliography
yes
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Abstract
This paper presents an eddy-current linear-rotary position sensor for ShuttlePump, an implantable total artificial heart based on a linear-rotary actuator. The sensor is obtained by extending a commercially available rotary position sensor with appropriate data processing by also capturing the information about the linear position. In fact, with changing linear distance of the target, the amplitudes of the sine and cosine sensor outputs change. Furthermore, the commercial IC serving as interface for the rotary sensor adjusts its excitation frequency due to the changing coupling between the sensor and the linearly moving target. Hence, there are two options to additionally measure the linear position, which are analyzed theoretically with finite element simulations, validated experimentally and compared in terms of achievable sensitivity, bandwidth and linearity. Both options allow to reach z-resolutions below the required 100 μm and a φ− accuracy in the 5° range while meeting the specified 100 Hz bandwidth requirement and can hence be used for feedback position control of ShuttlePump. Show more
Publication status
publishedExternal links
Book title
2022 25th International Conference on Electrical Machines and Systems (ICEMS)Pages / Article No.
Publisher
IEEEEvent
Subject
Artificial heart; Sensitivity; Frequency modulation; Position control; Linearity; Bandwith; Position measurementOrganisational unit
03573 - Kolar, Johann W. / Kolar, Johann W.
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ETH Bibliography
yes
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