Results 261 to 270 of about 186,585 (293)

Torque Collision Detection with Experimental Validation for Protontherapy Positioning Robot

2016
During a robotised protontherapy treatment, clinician, paramedical assistants and medical devices (stepladder, trolley, etc.) often enter the robots workspace. To overcome safety problems, a precise and reliable collision detection technique has been implemented on the LEONI Patient Positioning System (PPS) named Orion PT.
Baumeyer, Julien, Bernard, V, Miossec, Sylvain, Novales, Cyril, Poisson, Gérard, Vieyres, Pierre, Chemouny, Jérôme   +6 more
openaire   +2 more sources

Model-matching solution for optimal positive joint torque feedback

Proceedings of the 1997 IEEE/RSJ International Conference on Intelligent Robot and Systems. Innovative Robotics for Real-World Applications. IROS '97, 2002
Applying positive joint torque feedback in direct drive motor systems reduces the effect of external load torques. This is most beneficial when accurate position tracking is required in the presence of large disturbances or for complex loads as found in robotic manipulators.
F. Aghili, M. Buehler, J.M. Hollerbach
openaire   +1 more source

Robot torque and position control using an electrorheological actuator

Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 1998
An electrorheological (ER) clutch driven from a constant speed motor provides a steady torque independent of shaft angle and can be controlled by control of the applied field. Such an actuator avoids the ‘cogging’ variation in torque observed in d.c. servo-motors and is thus well suited to robot control applications, particularly in view of the very ...
D J Brookfield, Z B Dlodlo
openaire   +1 more source

Effect of Head-Neck Position on Elbow Flexor Muscle Torque Production

Physical Therapy, 1987
The purpose of this study was to investigate whether the tonic neck reflex affects elbow flexor muscle torque production in healthy, young adults and which head-neck (H-N) positions have the greatest influence. Forty-eight male and female students between the ages of 18 and 35 years volunteered as subjects.
H, Deutsch, H, Kilani, E, Moustafa, N, Hamilton, J P, Hebert   +4 more
openaire   +2 more sources

Robot Arm Safety Improvement by Position/Torque Switching Control

2011
With the development of robot technology, it is an inevitable trend in the future that Robots will come into the normal life. Robots must be safe enough and ensure no hazard to person in order to coexist with people harmoniously. This paper provides a method to promote the robot safety by taking position-torque-position switching control. Namely, robot
Wu Haibin, Zheng Hongqing, Yang Jianming, Li Feng   +3 more
openaire   +1 more source

Electromyographic response to pseudo-random torque disturbances of human forearm position

Neuroscience, 1978
Abstract Pseudo-random torque disturbances applied to the human forearm permitted the identification of linear relationships between motion and biceps/triceps electromyographic activity. In particular, a weighted sum of position, velocity and acceleration provided an adequate description of electromyographic activity over a large range of disturbance
J R, Dufresne, J F, Soechting, C A, Terzuolo   +2 more
openaire   +2 more sources

Position and torque control via rehabilitation robot and functional electrical stimulation

2017 International Conference on Rehabilitation Robotics (ICORR), 2017
Two common rehabilitation therapies for individuals possessing neurological conditions are functional electrical stimulation (FES) and robotic assistance. This paper focuses on combining the two rehabilitation strategies for use on the biceps brachii muscle group.
Christian A, Cousin, Courtney A, Rouse, Victor H, Duenas, Warren E, Dixon   +3 more
openaire   +2 more sources

Quadriceps Femoris Torque and EMG Activity in Seated versus Supine Position

Medicine & Science in Sports & Exercise, 2003
To compare voluntary and electrically evoked knee extensor torque, surface electromyography (EMG), and activation level obtained under seated versus supine position, i.e., with shortened versus lengthened rectus femoris (RF) muscle.The knee extensor torque obtained during maximal voluntary contractions (MVC) and after single and paired stimuli applied ...
Nicola A, Maffiuletti, Romuald, Lepers
openaire   +2 more sources

High accuracy torque measurement with position measuring devices

2022 IEEE Sensors Applications Symposium (SAS), 2022
Christian Brunner, Rainer Hagl
openaire   +1 more source

Robot Position Optimization Based on Joint Mean Torque Norm

2017
Optimal plant-floor robot positioning is a non-trivial task for robotic manufacturing. An unsuitable robot positioning may cost time and energy, which after thousands of cycles may be significant. The present article presents an approach to choose the robot base position through a numerical optimization tool.
Aníbal Alexandre Campos Bonilla, Leandro da Silva, Luis Eduardo Garcia Gonzalez   +2 more
openaire   +1 more source