Experimental evaluation of frequency response and firmness of apples based on an excitation technique using a dielectric elastomer actuator

Hiruta, Toshiki; Hosoya, Naoki; Maeda, Shingo; Kajiwara, Itsuro

doi:10.1016/j.sna.2021.112830

Cited by 8 publications

(8 citation statements)

References 45 publications

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Section: Dielectric Elastomersmentioning

confidence: 99%

“…The authors showed that encapsulated CB particles exhibited a lower aggregation compared to normal CB, which led to a higher polarized capacitance. In general, the pros of the actuators based on dielectric elastomer EAPs are their large displacements of strain up to 200-380%, high energy density (3.4 J/g) [15,29], fast response (maximum contraction frequency can reach 1000 Hz) [30], and being considered cheap. On the other hand, the cons of these polymers are their high driving voltage (~150 MV/m) In general, the pros of the actuators based on dielectric elastomer EAPs are their large displacements of strain up to 200-380%, high energy density (3.4 J/g) [15,29], fast response (maximum contraction frequency can reach 1000 Hz) [30], and being considered cheap.…”

Section: Dielectric Elastomersmentioning

confidence: 99%

“…In general, the pros of the actuators based on dielectric elastomer EAPs are their large displacements of strain up to 200-380%, high energy density (3.4 J/g) [15,29], fast response (maximum contraction frequency can reach 1000 Hz) [30], and being considered cheap. On the other hand, the cons of these polymers are their high driving voltage (~150 MV/m) In general, the pros of the actuators based on dielectric elastomer EAPs are their large displacements of strain up to 200-380%, high energy density (3.4 J/g) [15,29], fast response (maximum contraction frequency can reach 1000 Hz) [30], and being considered cheap. On the other hand, the cons of these polymers are their high driving voltage (~150 MV/m) and the occurrence of pre-strain and compromise in the actuation force due to their high displacements.…”

Section: Dielectric Elastomersmentioning

confidence: 99%

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Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

et al. 2022

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Unlike traditional actuators, such as piezoelectric ceramic or metallic actuators, polymer actuators are currently attracting more interest in biomedicine due to their unique properties, such as light weight, easy processing, biodegradability, fast response, large active strains, and good mechanical properties. They can be actuated under external stimuli, such as chemical (pH changes), electric, humidity, light, temperature, and magnetic field. Electroactive polymers (EAPs), called ‘artificial muscles’, can be activated by an electric stimulus, and fixed into a temporary shape. Restoring their permanent shape after the release of an electrical field, electroactive polymer is considered the most attractive actuator type because of its high suitability for prosthetics and soft robotics applications. However, robust control, modeling non-linear behavior, and scalable fabrication are considered the most critical challenges for applying the soft robotic systems in real conditions. Researchers from around the world investigate the scientific and engineering foundations of polymer actuators, especially the principles of their work, for the purpose of a better control of their capability and durability. The activation method of actuators and the realization of required mechanical properties are the main restrictions on using actuators in real applications. The latest highlights, operating principles, perspectives, and challenges of electroactive materials (EAPs) such as dielectric EAPs, ferroelectric polymers, electrostrictive graft elastomers, liquid crystal elastomers, ionic gels, and ionic polymer–metal composites are reviewed in this article.

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Section: Dielectric Elastomersmentioning

confidence: 99%

Section: Dielectric Elastomersmentioning

confidence: 99%

Section: Dielectric Elastomersmentioning

confidence: 99%

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Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

et al. 2022

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“…Many soft actuator devices have already been developed. Examples of soft actuators include soft pneumatic actuators ( Faudzi et al, 2018 ; Mohamed et al, 2020 ; Tschiersky et al, 2020 ; Ying et al, 2020 ; Luo et al, 2021 ), soft electroadhesion ( Shintake et al, 2016 ; Guo et al, 2018 ; Okuno et al, 2019 ; Persson and Guo, 2019 ), stretchable pumps ( Cacucciolo et al, 2019 ; Seki et al, 2020 ; Shigemune et al, 2021 ), dielectric elastomer actuators (DEAs) ( Ji et al, 2019 ; Kajiwara et al, 2019 ; Minaminosono et al, 2019 ; Wang et al, 2019 ; Hiruta et al, 2021 ; Takagi et al, 2021 ; Wiranata et al, 2021 ; Zhao et al, 2021 ) a shape memory polymer ( Besse et al, 2017 ; Li et al, 2020 ; Miao et al, 2020 ; Scalet, 2020 ; Zeng et al, 2020 ), and gel actuators ( Maeda et al, 2007 , 2010 ; Hwang et al, 2019 ; Mao et al, 2020a , 2020b ; Zhang et al, 2020 ). To create an interface between soft actuators and human activity, the actuator must be equipped with an appropriate sensing method.…”

Section: Introductionmentioning

confidence: 99%

A DIY Fabrication Approach of Stretchable Sensors Using Carbon Nano Tube Powder for Wearable Device

et al. 2021

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Soft robotics and wearable devices are promising technologies due to their flexibility. As human-soft robot interaction technologies advance, the interest in stretchable sensor devices has increased. Currently, the main challenge in developing stretchable sensors is preparing high-quality sensors via a simple and cost-effective method. This study introduces the do-it-yourself (DIY)-approach to fabricate a carbon nanotube (CNT) powder-based stretchable sensor. The fabrication strategy utilizes an automatic brushing machine to pattern CNT powder on the elastomer. The elastomer ingredients are optimized to increase the elastomer compatibility with the brushing method. We found that polydimethylsiloxane-polyethyleneimine (PDMS-PEIE) is 50% more stretchable and 63% stickier than previously reported PDMS 30-1. With these improved elastomer characteristics, PDMS-PEIE/multiwalled CNT (PDMS-PEIE/MWCNT-1) strain sensor can realize a gauge factor of 6.2–8.2 and a responsivity up to 25 ms. To enhance the compatibility of the powder-based stretchable sensor for a wearable device, the sensor is laminated using a thin Ecoflex membrane. Additionally, system integration of the stretchable sensors are demonstrated by embedding it into a cotton-glove and a microcontroller to control a virtual hand. This cost-effective DIY-approach are expected to greatly contribute to the development of wearable devices since the technology is simple, economical, and reliable.

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“…Many soft actuator devices have already been developed. Examples of soft actuators include soft pneumatic actuators (Faudzi et al, 2018;Mohamed et al, 2020;Tschiersky et al, 2020;Ying et al, 2020;Luo et al, 2021), soft electroadhesion (Shintake et al, 2016;Guo et al, 2018;Okuno et al, 2019;Persson and Guo, 2019), stretchable pumps (Cacucciolo et al, 2019;Seki et al, 2020;Shigemune et al, 2021), dielectric elastomer actuators (DEAs) (Ji et al, 2019;Kajiwara et al, 2019;Minaminosono et al, 2019;Wang et al, 2019;Hiruta et al, 2021;Takagi et al, 2021;Zhao et al, 2021) a shape memory polymer (Besse et al, 2017;Li et al, 2020;Miao et al, 2020;Scalet, 2020;Zeng et al, 2020), and gel actuators (Maeda et al, 2007(Maeda et al, , 2010Hwang et al, 2019;Mao et al, 2020aMao et al, , 2020bZhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of frequency response and firmness of apples based on an excitation technique using a dielectric elastomer actuator

Cited by 8 publications

References 45 publications

Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

A DIY Fabrication Approach of Stretchable Sensors Using Carbon Nano Tube Powder for Wearable Device

Video2.MP4

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