Dynamic Light Control Using Bionic Dielectric Elastomer Iris Actuators

Martin, Sina; Bruns, Arne; Franke, Jörg

doi:10.1002/adfm.202112260

Cited by 6 publications

(7 citation statements)

References 23 publications

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“…Scalability is also difficult and tends to restrict use to small dimensioned applications. Here, however, the very thin design can be of benefit, particularly in medical applications such as bionic dielectric elastomer iris actuators [48]. In addition, bioinspired soft robotics have also been developed with DEAs [49,50].…”

Section: Results To the Summary Of The State Of The Art Of Artificial...mentioning

confidence: 99%

Assessment of the Suitability of Selected Linear Actuators for the Implementation of the Load-Adaptive Biological Principle of Redundant Motion Generation

Bartz,

Jüttner,

Halmos

et al. 2024

Biomimetics

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The load-adaptive behavior of the muscles in the human musculoskeletal system offers great potential for minimizing resource and energy requirements in many technical systems, especially in drive technology and robotics. However, the lack of knowledge about suitable technical linear actuators that can reproduce the load-adaptive behavior of biological muscles in technology is a major reason for the lack of successful implementation of this biological principle. In this paper, therefore, the different types of linear actuators are investigated. The focus is particularly on artificial muscles and rope pulls. The study is based on literature, on the one hand, and on two physical demonstrators in the form of articulated robots, on the other hand. The studies show that ropes are currently the best way to imitate the load-adaptive behavior of the biological model in technology. This is especially illustrated in the context of this paper by the discussion of different advantages and disadvantages of the technical linear actuators, where ropes, among other things, have a good mechanical and control behavior, which is very advantageous for use in an adaptive system. Finally, the next steps for future research are outlined to conclude how ropes can be used as linear actuators to transfer load-adaptive lightweight design into technical applications.

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Section: Results To the Summary Of The State Of The Art Of Artificial...mentioning

confidence: 99%

Assessment of the Suitability of Selected Linear Actuators for the Implementation of the Load-Adaptive Biological Principle of Redundant Motion Generation

Bartz,

Jüttner,

Halmos

et al. 2024

Biomimetics

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“…Because cuttlefish contract around 80% of the dilated pupil area in daytime ( 21 ), the artificial W-shaped pupil has 20% of the opening area, enabling high-contrast imaging by balancing vertically uneven lights. A promising solution for 3D-adjustable pupils may be the use of light-actuated elastomers ( 13 , 36 – 38 ). Another approach may be to use a photochromic dye that changes light transmittance depending on external light intensity ( 39 ).…”

Section: Discussionmentioning

confidence: 99%

Cuttlefish eye–inspired artificial vision for high-quality imaging under uneven illumination conditions

et al. 2023

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With the rise of mobile robotics, including self-driving automobiles and drones, developing artificial vision for high-contrast and high-acuity imaging in vertically uneven illumination conditions has become an important goal. In such situations, balancing uneven illumination, improving image contrast for facile object detection, and achieving high visual acuity in the main visual fields are key requirements. Meanwhile, in nature, cuttlefish (genus Sepia ) have evolved an eye optimized for vertically uneven illumination conditions, which consists of a W-shaped pupil, a single spherical lens, and a curved retina with a high-density photoreceptor arrangement and polarized light sensitivity. Here, inspired by the cuttlefish eye, we report an artificial vision system consisting of a W-shaped pupil, a single ball lens, a surface-integrated flexible polarizer, and a cylindrical silicon photodiode array with a locally densified pixel arrangement. The W-shaped pupil integrated on the ball lens balances vertically uneven illumination, and the cylindrical silicon photodiode array integrated with the flexible polarizer enables high-contrast and high-acuity imaging.

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“…Among these, DE is regarded as one of the most promising actuation materials to combine with perception. DEs show large strains, fracture toughness, and power-to-weight ratios, which have been widely researched in the fields of flexible wearable devices, artificial muscles, and bionic robots , and have many substantial applications such as soft lens, − fast moving fish, − crawling robot, and flapping-wing robot. , DEs exhibit the capability to integrate with sensing in terms of both characteristics and application circumstances.…”

Section: Introductionmentioning

confidence: 99%

Self-Perceptional Soft Robotics by a Dielectric Elastomer

Pan,

Pu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Soft robotics has been a rapidly growing field in recent decades due to its advantages of softness, deformability, and adaptability to various environments. However, the separation of perception and actuation in soft robot research hinders its progress toward compactness and flexibility. To address this limitation, we propose the use of a dielectric elastomer actuator (DEA), which exhibits both an actuation capability and perception stability. Specifically, we developed a DEA array to localize the 3D spatial position of objects. Subsequently, we integrate the actuation and sensing properties of DEA into soft robots to achieve self-perception. We have developed a system that integrates actuation and sensing and have proposed two modes to achieve this integration. Furthermore, we demonstrated the feasibility of this system for soft robots. When the robots detect an obstacle or an approaching object, they can swiftly respond by avoiding or escaping the obstacle. By eliminating the need for separate perception and motion considerations, self-perceptional soft robots can achieve an enhanced response performance and enable applications in a more compact and flexible field.

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Dynamic Light Control Using Bionic Dielectric Elastomer Iris Actuators

Cited by 6 publications

References 23 publications

Assessment of the Suitability of Selected Linear Actuators for the Implementation of the Load-Adaptive Biological Principle of Redundant Motion Generation

Assessment of the Suitability of Selected Linear Actuators for the Implementation of the Load-Adaptive Biological Principle of Redundant Motion Generation

Cuttlefish eye–inspired artificial vision for high-quality imaging under uneven illumination conditions

Self-Perceptional Soft Robotics by a Dielectric Elastomer

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