Energy Density and Hysteresis Comparison in Natural Rubber Tube Springs for Wearable Exoskeleton Applications

Perry, Joel C.; Rathod, Abhishek

doi:10.1109/icorr.2019.8779400

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The springs are planar natural rubber sheets, which exhibit low hysteresis (2 to 4% energy loss; figs. S1 and S2), store about 15 times more energy per unit mass than steel springs (20), and allow for a tightly stacked array when used with planar electrodes (figs. S3 to S6).…”

Section: Prototype Actuator Designmentioning

confidence: 99%

Elastic energy-recycling actuators for efficient robots

Krimsky,

Collins

2024

Sci. Robot.

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Electric motors are widely used in robots but waste energy in many applications. We introduce an elastic energy-recycling actuator that maintains the versatility of motors while improving energy efficiency in cyclic tasks. The actuator comprises a motor in parallel with an array of springs that can be individually engaged and disengaged, while retaining stored energy, by pairs of low-power electroadhesive clutches. We developed a prototype actuator and tested it in five repetitive tasks with features common in robotic applications but difficult to perform efficiently. The actuator reduced power consumption by at least 50% in all cases and by 97% in the best case. Elastic energy recovery, controlled by low-power clutches, can improve the efficiency of mobile robots, assistive devices, and other engineered systems.

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Section: Prototype Actuator Designmentioning

confidence: 99%

Elastic energy-recycling actuators for efficient robots

Krimsky,

Collins

2024

Sci. Robot.

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“…Due to its unique elasticity, a high‐quality NR compound is able to store ≈150 times more energy than the same stored per unit weight of the spring steel. [ 107 ] A well‐designed rubber product can offer a number of ample advantages such as being lightweight, tough, and resistant to nonideal environmental condition. Currently, artificial hearts are being made from rubber materials.…”

Section: Elastomersmentioning

confidence: 99%

Stimuli–Responsive Mechanoadaptive Elastomeric Composite Materials: Challenges, Opportunities, and New Approaches

Dolui,

Natarajan,

et al. 2023

Adv Eng Mater

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Stimuli‐responsive mechano‐adaptive materials, capable of reversibly changing their mechanical properties when exposed to an external stimulus, are the next generation of smart materials with immense transformative potential for various technological applications. Although the concept of adaptive mechanical properties has been proven for some materials, it remains very challenging for soft elastomeric materials. The aim of this review is to provide new ideas and strategies for the development of mechano‐adaptive elastomeric composites using commercial rubber as the matrix polymer. The fundamental question addressed here is: How do the phase‐responsive functional fillers alter the mechanical properties? For a given physical network environment, what is the mechanism that gives rise to the stimuli‐responsive properties of the resulting composites?? This paper summarizes the preparation, structure and properties of recently developed mechano‐adaptive elastomeric materials. Furthermore, based on their structure‐property relationships, plausible applications of these smart materials in various technology‐specific applications such as soft robotics, actuators, sensors, smart tires, automotive design, aerospace etc. are demonstrated with representative examples. Finally, the paper critically discusses the existing challenges in the field of mechano‐adaptive elastomers in order to provide valuable insights in this area.This article is protected by copyright. All rights reserved.

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Energy Density and Hysteresis Comparison in Natural Rubber Tube Springs for Wearable Exoskeleton Applications

Cited by 2 publications

References 9 publications

Elastic energy-recycling actuators for efficient robots

Elastic energy-recycling actuators for efficient robots

Stimuli–Responsive Mechanoadaptive Elastomeric Composite Materials: Challenges, Opportunities, and New Approaches

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