Results 61 to 70 of about 15,483 (283)

Adaptive gravity and joint stiffness compensation methods for force-controlled arm supports [PDF]

, 2015
People with muscular weakness can benefit from arm supports that compensate the weight of their arms. Due to the disuse of the arms, passive joint stiffness increases and providing only gravity compensation becomes insufficient to support the arm ...
Keemink, Arvid Quintijn Leon; id_orcid, Koopman, Hubertus F.J.M.; id_orcid, Stienen, Arno, Peter H. Veltink, Veltink, Petrus H., Bart F.J.M. Koopman, Arno H.A. Stienen, Joan Lobo-Prat, Arvid Q.L. Keemink, Lobo Prat, J.   +9 more
core   +2 more sources

Accurate Center of Gravity Compensation for Improved Translational Control Performance of Two-Wheeled Robot With Arm

IEEE Access
Owing to their high center of gravity (CoG) and small footprint, two-wheeled robots (TWRs) are expected to be used in collaborative tasks with humans.
Hirotaka Kanazawa, Yasuhiro Miyata, Masamichi Nawa, Norihiko Kato, Toshiyuki Murakami   +4 more
doaj   +1 more source

Identifying Physical Interactions in Contact‐Based Robot Manipulation for Learning from Demonstration

Advanced Robotics Research, EarlyView.
Robots can learn manipulation tasks from human demonstrations. This work proposes a versatile method to identify the physical interactions that occur in a demonstration, such as sequences of different contacts and interactions with mechanical constraints.
Alex Harm Gert‐Jan Overbeek, Herman van der Kooij, Douwe Dresscher, Mark Vlutters   +3 more
wiley   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

Advanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun, Liang Zhang, Jianwen Zeng, Xuefeng Wang   +3 more
wiley   +1 more source

Mechanism Design and System Control for Humanoid Space Robot Movement Using a Simple Gravity-Compensation System

International Journal of Advanced Robotic Systems, 2013
Space robots are an effective resource for astronauts working in a dangerous space environment. This paper proposes and implements a system to validate the performance of robot movement in space.
Zhihong Jiang, Shilong Liu, Hui Li, Que Dong, Xiaopeng Chen, Qiang Huang   +5 more
doaj   +1 more source

Gravity Compensator for the Roll-pitch Rotation [PDF]

Journal of Institute of Control, Robotics and Systems, 2010
This paper presents a gravity compensator for the manipulator of a service robot. The manipulator of a service robot is operated with low velocity for the safety reason in most cases. In this situation gravitational torques generated by the mass of links are often much greater than dynamic torques for motion.
Chang-Hyun Cho, Woo-Sub Lee, Sung-Chul Kang   +2 more
openaire   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Position and Attitude Control Based on Single Neuron PID With Gravity Compensation for Quad Rotor UAV

Journal of Aerospace Technology and Management, 2023
Aimed at the deficiency of existing PID controller for quad rotor UAV, a single neuron PID controller with gravity compensation is presented. After using feed forward control to compensate gravity, the position loop adopts PID control to ensure control ...
Haitao Zhang, Lulu Yang
doaj  

An explorative study into changes in reach performance after gravity compensation training in chronic stroke patients [PDF]

, 2009
After stroke, arm function can be limited by a reduction in the selectivity of movements, due to involuntary coupling of shoulder abduction and elbow flexion, limiting the ability to reach.
Renzenbrink, G.J., H.J. Hermens, G.B. Prange, Krabben, T., T. Krabben, de Boer, Jan, Hermens, Hermanus J., J. de Boer, Jannink, M.J.A., G.J. Renzenbrink, Prange, Grada Berendina, M.J.A. Jannink   +11 more
core   +1 more source