Results 241 to 250 of about 2,664,170 (292)

Colonoscopy with the Variable Stiffness Colonoscope

Gastrointestinal Endoscopy, 2003
During colonoscopy, sharp angulations and fixation of the bowel increase the difficulty of the procedure. Excessive “looping” of the bowel implies that the force of scope insertion is transferred to the colon wall or to its mesenteric attachment instead of to the forward advancement of the leading tip of the colonoscope.
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A variable-stiffness and healable pneumatic actuator

Materials Horizons, 2023
A pneumatic actuator based on variable-stiffness and self-healing polymers shows high load capacity at room temperature but can be actuated pneumatically upon heating. And it can be thermally healed after damaging, thus can prolong its service time.
Hong-Qin Wang, Zi-Yang Huang, De-Wei Yue, Fang-Zhou Wang, Cheng-Hui Li   +4 more
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A mechatronic approach for robust stiffness estimation of variable stiffness actuators

2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2013
This paper proposes a novel mechatronic approach for on-line robust estimation of both torque and stiffness of Variable Stiffness Actuators (VSA). The proposed solution is demonstrated robust with respect to uncertainties affecting both the dynamic parameters of the motor and to the efficiency of the motor gearbox.
Cirillo A, DE MARIA, Giuseppe, NATALE, Ciro, PIROZZI, Salvatore   +3 more
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Variable bipedal walking gait with variable leg stiffness

5th IEEE RAS/EMBS International Conference on Biomedical Robotics and Biomechatronics, 2014
The Spring-Loaded Inverted Pendulum (SLIP) model has been shown to exhibit many properties of human walking, and therefore has been the starting point for studies on robust, energy-efficient walking for robots. In this paper, the problem of gait variation during walking on the SLIP model is addressed by controlling the leg stiffness and the angle-of ...
Wesley Roozing, Ludo C. Visser, Raffaella Carloni   +2 more
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Stiffness control of variable stiffness joint using electromyography signals

2013 IEEE International Conference on Robotics and Automation, 2013
We have developed a multi-functional joint mechanism with variable joint stiffness and the ability to sense external forces. In this joint, silicone rubber cushions are employed to adjust the joint stiffness by controlling the pressure in the cushions.
Shinya Kajikawa, Tasuku Ito, Hidenosuke Hase   +2 more
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A new variable stiffness robot joint

Industrial Robot: An International Journal, 2015
Purpose – This study aims to propose a new variable stiffness robot joint (VSR-joint) for operating safely. More and more variable stiffness actuators are being designed and implemented because of their ability to minimize large forces due to shocks, to safely interact with the user and their ability to store and release
Yong Tao, Tianmiao Wang, Yunqing Wang, Long Guo, Hegen Xiong, Dong Xu 0005   +5 more
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Parallel Variable Stiffness Actuators

2021 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2021
Chase W. Mathews, David J. Braun
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Vibration Suppression by Variable-Stiffness Members

AIAA Journal, 1990
The active vibration suppression with this type of variable-stiffness member is shown to be always stable. A theoretical investigation on a single-degree-of-freedom system shows potential high efficiency for this type of variable-stiffness system due to its unique hysteretic ...
JUNJIRO ONODA, NAOYUKI WATANABE, TAKAO ENDO, HIDEHIKO TAMAOKI   +3 more
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Design of a robot joint with variable stiffness

2008 IEEE International Conference on Robotics and Automation, 2008
A robot joint with a variable stiffness unit is presented. The variable stiffness unit (VSU) is composed of a motor, two rings that consist of arc-shaped magnets separated by spacers, and a linear guide to change the cross-sectional area of the two rings.
Junho Choi, Sunchul Park, Woosub Lee, Sungchul Kang   +3 more
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Stiffness Analysis of a Variable Stiffness Joint Using a Leaf Spring

2017
A variable stiffness joint using a leaf spring is designed to ensure physical safety. The joint stiffness is often controlled by changing the effective length of the leaf spring. The stiffness model based on the small-deformation theory cannot solve large deflection problems of the leaf spring caused by larger joint deflected angles.
Lijin Fang, Yan Wang 0019
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