Case studies

Predicting and optimizing magnet performance

Using a magnet positioning model and our Reves DSE software.

Jakko Nieuwenkamp
Professional Expert
Predicting and optimizing magnet performance
Type
Case study
Category
Virtual testing
Client
Ecsel joined undertaking

Improving fixation force and alignment

The fixation force and the alignment of a transmitter and receiver in cochlear implants are important factors in the overall performance of the hearing device. To improve that performance we created a magnet positioning model and then used our Reves DSE software to optimize the design for alignment and fixation.

The fixation force and the alignment of a transmitter and receiver in cochlear implants are important factors in the overall performance of the hearing device. To improve that performance we created a magnet positioning model and then used our Reves DSE software to optimize the design for alignment and fixation.

Step 1 – Create surrogate model

The first step in de modeling process is the creation of a surrogate model that predicts the forces between two magnets. The forces were calculated with a numerical model for different gap heights and misalignment.

Step 2 – Stability check

The next step is to check whether the magnet will stay attached or snap into another position. Stability is checked by verifying the needed frictional force is smaller than the normal force times the COF. Possible external forces like gravity or acceleration are taken into account.

Step 3 – Predict end position

The final step is to predict the end position, if stability is lacking. Knowing the sliding direction, a stable end position is found when

After modeling: Design Space Exploration

After experimentally validating the model, we use our Reves DSE software to navigate design space for solutions to optimize the design for alignment and fixation. Finding solutions is made easy in Reves DSE by using views, while the Monte Carlo approach balances control and flexibility.

Conduct your own experiment

Download the PDF “Magnet model in Reves DSE” to conduct your own experiment using a free full functional version of both the magnet positioning model and our Reves DSE software. The PDF contains:

  • Link to the Magnet Positioning Model
  • Link to a trial version of our Reves DSE software
  • Example parameter settings for design space exploration
  • Example applications of the Magnet Positioning Model
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More about our work

For further details on this case or a demo of the model and its findings, please contact us on <nobr>+31 (0) 88 5202 500<nobr> We're more than happy to share our knowledge and expertise.

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