Scientific highlights
© Werner Siemens Stiftung, Félix Wey

Dielectric Elastomer Actuator Manufacturing

DEAs test and modelling

We have developed an automatic test bench to evaluate and perform intensive tests of our actuator. The preliminary assessments show promising features both in terms of the actuator characteristics and the test bench capability. We have compared these measurements to our Finite Element Model to validate the latter. We now have a near-predictive model that will be useful to optimize the final actuator.

© Werner Siemens Stiftung, Félix Wey

Flowloop and Windkessel model

We have a mock-up Flow loop that imitates the blood circulatory system. We have undertaken our first attempt to plug our actuator on the flowloop.

In parallel, we have established a more accurate, lumped model that is based on the Windkessel model and in which we have integrated our actuator model. This tool will allow us to forecast the blood circulatory system’s response according to our actuator activation. The preliminary measurements on the flowloop will allow us to adjust our modified lumped model to match the body’s behavior as closely as possible.

The lumped model has also highlighted that one ring might be a good starting device to support the heart. It allows us to modify the pressure after the aortic valve. We have been able to demonstrate that we are capable of modifying the heart’s energy or blood flow rate by approximately 10 % depending on the way we actuate our device.

© Werner Siemens Stiftung, Félix Wey

Power supply

We already have a custom-made, compact set-up showing the wireless power transfer working on a battery. We have also developed our own electronic system going from 12 V to 7 kV. This electronic should also allow us to harvest the electrical energy stored in our actuator in order to increase the global efficiency of our system. We have just started to plug the new electronic to our actuator.

We plan to merge the two electronic subsystems in 2020 resulting in an efficient power supply.

© Werner Siemens Stiftung, Félix Wey