Modelling dielectric elastomer circuit networks for soft biomimetics
Open Access
- 12 October 2021
- journal article
- research article
- Published by IOP Publishing in Bioinspiration & Biomimetics
- Vol. 16 (6), 065006
- https://doi.org/10.1088/1748-3190/ac2786
Abstract
In order to obtain entirely soft bio-inspired robots, fully soft electronic circuits are needed. Dielectric elastomers (DEs) are electroactive polymers that have demonstrated multifunctionality. The same material can achieve different tasks like actuation, sensing, or energy harvesting. It has been shown that basic logic and memory functions can be realized with similar soft structures by combining multiple DE actuators and DE switches. Thus it would be possible to build, with the same materials and processes, a soft structure that mimics a biological being with all these capabilities. This contribution is focused on the modelling of the aforementioned soft electro-mechanical circuit networks. It is here reported the building process of a comprehensive SIMULINK model including the electro-mechanical behaviour of DE logic units and their interconnections. Conventional models deal with a single aspect of DEs, generating complex finite-element simulations. This contribution, based on a former model for an inverter-based DEO, shows how to integrate these various mathematical models and, with the help of direct measurements, create a software representation of DE circuit networks. This work is intended to demonstrate the validity of a recently introduced model and apply it to more complex circuit networks that have a higher number of components. Since, at the present state, the building processes are by hand, adding components generates more variability due to sample-to-sample variation and human error. Despite this, the model still shows a qualitatively good prediction of the devices' behaviour. Furthermore, the introduction of new materials and automatic processes will help to reduce this variability, allowing the model to reach even better performance.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (418669083)
This publication has 35 references indexed in Scilit:
- Modeling, Identification, and Control of a Dielectric Electro-Active Polymer Positioning SystemIEEE Transactions on Control Systems Technology, 2014
- Multi-functional dielectric elastomer artificial muscles for soft and smart machinesJournal of Applied Physics, 2012
- Model of dissipative dielectric elastomersJournal of Applied Physics, 2012
- Soft generators using dielectric elastomersApplied Physics Letters, 2011
- Finite element modelling of dielectric elastomer minimum energy structuresApplied Physics A, 2008
- Mechanical behavior of an acrylic elastomer used in dielectric elastomer actuatorsSensors and Actuators A: Physical, 2007
- Modeling of a pre-strained circular actuator made of dielectric elastomersSensors and Actuators A: Physical, 2005
- Piezoresistance behavior of silicone–graphite composites in the proximity of the electric percolation thresholdSensors and Actuators A: Physical, 2005
- Electroactive Polymers as Artificial Muscles: A ReviewJournal of Spacecraft and Rockets, 2002
- Conduction mechanisms in some graphite - polymer composites: the effect of a direct-current electric fieldJournal of Physics: Condensed Matter, 1997