Designing components using smartMOVE electroactive polymer technology

Rosenthal, Marcus; Weaber, Chris; Polyakov, Ilya; Zarrabi, Al; Gise, Peter

doi:10.1117/12.782124

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…A gate valve using an antagonist cone DEA was conceived and tested, and proven to complete a cycle in one second under an actuation voltage of 4KV producing a 0.23mm displacement [15]. A poppet valve using a spring-loaded antagonistic cone DEA that had the advantage of being naturally closed (inactive) [16], as well as a proportional gate valve driven by an antagonistic cone DEA were also proposed [17]. Diaphragm DEAs were also developed for valve and pumps applications [18].…”

Section: Dea Valve Backgroundmentioning

confidence: 99%

Design of a MRI-compatible dielectric elastomer powered jet valve

et al. 2011

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Binary Pneumatic Air Muscles (PAM) arranged in an elastically-averaged configuration can form a cost effective solution for Magnetic Resonance Imaging (MRI) guided robotic interventions like prostate cancer biopsies and brachytherapies. Such binary pneumatic manipulators require about 10 to 20 MRI-compatible valves to control the pressure state of each PAM. In this perspective, this paper presents the design of a novel dielectric elastomer actuator (DEA) driven jet-valve to control the states of the PAMs. DEAs are MRI compatible actuators that are well suited to the simplicity and cost-effectiveness of the binary manipulation approach. The key feature of the proposed valve design is its 2 stages configuration in which the pilot stage is moved with minimal mechanical friction by a rotary antagonistic DEA made with acrylic polymer films. The prismatic geometry also integrates the jet nozzle within the DEA volume to provide a compact embodiment with a reduced number of parts. The low actuation stretches enabled by the rotary configuration minimize viscoelastic losses, and thus, maximize the frequency response of the actuator while maximizing its reliability potential. The design space of the proposed jet valve is studied using an Ogden hyperelastic model and the valve dynamics is predicted with a 1D Bergstrom-Boyce viscoelastic model. Altogether, the low friction of the pilot stage and optimized DEA dynamics provide an experimental shifting time of the complete assembly in the 200-300ms range. Results from this work suggest that the DEA driven jet valve has great potential for switching a large number of pneumatic circuits in a MRI environment with a compact, low cost and simple embodiment.

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Section: Dea Valve Backgroundmentioning

confidence: 99%

Design of a MRI-compatible dielectric elastomer powered jet valve

et al. 2011

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“…Fig.1 shows the design of the investigated DEAP diaphragm actuator. As depicted in the front and side views of Fig.1, the single layered DEAP diaphragm actuator consists of two electrodes, a hyperelastic polymer with the thickness δ 0 and an inner and outer frame [1]. According to the acting forces, the equilibrium of forces can be summed up to…”

Section: Working Principle Of a Deap Diaphragm Actuatormentioning

confidence: 99%

Viscoelastic modelling and experimental results of a dielectric electro‐active polymer diaphragm actuator

Gaida

Weinberg

Jahr

2014

Proc Appl Math and Mech

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Common actuating principles e.g. solenoids or piezo-elements have mostly exploited their potential as electromechanical transducers. A new technology based on Dielectric Electro-active Polymers (DEAPs) enables major progress in efficiency and functionality for actuators. In order to use the advantages of this new technology in a feasible application, a silicone based DEAP diaphragm actuator was tested experimentally. Here, the mechanical properties of the fundamental parts of the DEAP diaphragm actuator, namely the stressstrain behaviour of an equibiaxially pre-stretched hyperelastic polymer and the mechanical response of a DEAP diaphragm actuator, were determined by appropriate test benches.The investigated DEAP diaphragm actuator consists of a dielectric, which corresponds to a thin elastic silicone film sandwiched between two compliant electrodes. Furthermore, DEAPs are pre-stretched, actually up to five times their in-plane dimensions, in order to improve their performance. In that context, the influence of the pre-stretched state on the actuator performance was investigated. In addition, a viscoelastic finite-element model of the electromechanical system has been developed and validated with the experimental results. The mechanical part of the DEAP diaphragm actuator was realized with an incompressible isotropic elastic model, whereas the electrical part was approximated with a circular parallel-plate capacitor.

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“…Das mechanische Vorspannen der zentralen Scheibe aus der Ebene erzeugt den "Universal Muscle Actuator", der sich besonders für Pumpen und Ventile eignet, da die Membran die Scheibe zentriert, wodurch der Bedarf an zusätzlichen mechanischen Führungskompo-nenten verringert wird. [81] Andere Membranaktoren werden durch Laminieren auf ein nicht dehnbares Substrat hergestellt. Die unimorphen und bimorphen Geometrien (laminiert auf eine oder beide Seiten des Substrates) sorgen für große Biegebewegungen aus der Ebene bei geringer Kraft.…”

Section: Dehnfähige Elektrodenunclassified