Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 8: Precision Measurements I (joint session Q/A)

A 8.7: Talk

Monday, March 11, 2024, 18:30–18:45, HS 1221

Investigating a Tensegrity structure as a possible multi DoF inertial sensor — •Ben Becker, Oliver Gerberding, and Artem Basalaev — IExP, Hamburg, Germany

One of the continued challenges for gravitational wave detectors is the advancement of inertial sensors to improve the active isolation of the mirrors. Towards that end we are investigating tensegrity structures as a possible multi degree of freedom inertial sensor. Tensegrity structures are disconnected multi body structures held together by tensioned wires. They offer the option of tuning their mechanical properties by changing the moment of inertial as well as the wire tension. We've simulated a model tensegrity using Ansys multibody dynamics and analyzed its mechanical response to excitation. We compare the direct simulation result with the results of a simulated readout scheme. This readout scheme will be realized on a real tensegrity model for further comparison. We've observed and fitted the transfer functions of the system to get a more thorough understanding with regards to its invertibility and thermal noise. The tensegrity shows distinct transfer function with regimes of linear response for most relevant degrees of freedom. Therefore it should indeed be viable as an inertial sensor.

Keywords: inertial sensor; multi DoF; tensegrity; control; suspension