Results 21 to 30 of about 2,655,722 (289)
International Journal of Advanced Robotic Systems, 2015 The variable stiffness actuator (VSA) is an open research field. This paper introduces the conceptual design and analysis of four types of novel variable stiffness actuators (VSAs).
Jishu Guo, Guohui Tian
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Online Reconfiguration of a Variable-Stiffness Actuator [PDF]
IEEE/ASME Transactions on Mechatronics, 2018 This paper presents an algorithm to adjust the configuration of a variable-stiffness actuator to reduce its electrical energy requirements during the execution of repetitive tasks. The algorithm is based on the gradient descent optimization method with a modification of the adaptation step size, a forgetting term, and a projection rule to cope with the
Rene Jimenez-Fabian +4 more
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A Stiffness Estimator for Agonistic–Antagonistic Variable-Stiffness-Actuator Devices [PDF]
IEEE Transactions on Robotics, 2014 Safe Physical Human Robot Interaction, conservation of energy and adaptability are just the main robotic applications that prompted the development of a number of Variable Stiffness Actuators (VSA). Implemented in a variety of ways, they use various technologies, and feature the most diverse mechanical solutions, all of which share a fundamentally ...
Tomas Menard +2 more
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A New Variable Stiffness Design: Matching Requirements of the Next Robot Generation [PDF]
, 2008 — Facing new tasks, the conventional rigid design of robotic joints has come to its limits. Operating in unknown environments current robots are prone to failure when hitting unforeseen rigid obstacles. Moreover, safety constraints are a major aspect for
Hirzinger, Gerd +3 more
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Immersion and Invariance Control for an Antagonistic Joint with Nonlinear Mechanical Stiffness [PDF]
, 2010 Tendon controlled robots with nonlinear mechanical tendon stiffness are becoming more and more popular. With the appropriate actuation, the joint position and the stiffness between motor and link side can be prescribed at the same time. In this paper,
Hirzinger, Gerd +5 more
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An Electric Self‐Sensing and Variable‐Stiffness Artificial Muscle
Advanced Intelligent Systems, 2023 Soft robots have better flexibility than their rigid counterparts thus offering greater adaptability to changing environments. These robots made from flexible materials are generally with low stiffness and have limited capability to perform tasks that ...
Chen Liu +2 more
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Time-Energy Optimal Trajectory Planning for Variable Stiffness Actuated Robot
IEEE Access, 2019 A variable stiffness actuator is inspired by the human motor control and is the most popular actuator used to exploit the human performance and human-like motion.
Chen Ji, Minxiu Kong, Ruifeng Li
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A Variable Stiffness Actuator Based on Leaf Springs: Design, Model and Analysis
Actuators, 2022 In order to adapt to complex and changeable mechanical conditions and make the deformable mechanisms perform well statically and dynamically, variable stiffness joints have been studied extensively.
Yifan Lu +5 more
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Design of a New Nonlinear Stiffness Compliant Actuator and Its Error Compensation Method
Journal of Robotics, 2016 Compliant actuators are more advantageous than stiff actuators in some circumstances, for example, unstructured environment robots and rehabilitation robots. Compliant actuators are more adaptive and safe. Constant stiffness compliant actuators have some
Shaobin Lan, Zhibin Song
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Stiffness Estimation and Nonlinear Control of Robots with Variable Stiffness Actuation [PDF]
IFAC Proceedings Volumes, 2011 Abstract We consider the problem of estimating on line the nonlinear stiffness of flexible transmissions in robots with variable stiffness actuation in agonistic-antagonistic configuration. Stiffness estimation is obtained using a dynamic residual that provides a filtered version of the unmeasured flexibility torques, combining it with a recursive ...
DE LUCA, Alessandro, FLACCO, FABRIZIO
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