Results 251 to 260 of about 185,318 (292)

Electrode position markedly affects knee torque in tetanic, stimulated contractions

European Journal of Applied Physiology, 2015
The purpose of this study was to investigate how much the distance between stimulation electrodes affects the knee extension torque in tetanic, electrically elicited contractions.Current pulses of progressively larger amplitude, from 0 mA to maximally tolerated intensities, were delivered at 20 pps to the vastus medialis, rectus femoris and vastus ...
MARTINS, TAIAN, Potenza, Paolo, GASTALDI, LAURA, BOTTER, ALBERTO   +3 more
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Proposal of position sensorless control and torque ripple compensation based on torque sensor feedback

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
This paper presents the following two methods based on torque sensor feedback: new position sensorless control method for surface-mounted permanent magnet synchronous machines (SPMSMs) and torque ripple compensation. The position sensorless techniques can be classified into two categories: the techniques based on the back electromotive force (back-EMF)
Yoshiyasu Takase, Hiroshi Nakamura, Takashi Mamba, Fei Zhao   +3 more
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Positive Direct-Drive Two-Stage Torque Converters

SAE Technical Paper Series, 1952
<div class="section abstract"><div class="htmlview paragraph">THERE are four common ways in which the torque converter can be used in passenger cars. These are listed by the author as follows: <ol class="list nostyle"> <li class="list-item"> <span class="li-label">1.</span> <div class="htmlview paragraph">To ...
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Collision position sensing for manipulator using force/torque sensor

2015 34th Chinese Control Conference (CCC), 2015
Force sensing including collision position, force direction and force size makes robots smoothly interact with environment to strongly adapt to outside world. Skin sensing imitates principle of human skin using special material and physical structure with disadvantages of complex design, low sampling rate, and poor generality and so on.
Leng Yuquan, Chen Zhengcang, Zhang Wei, Zhang Yang, He Xu, Luo Haitao, Zhou Weijia   +6 more
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Torque, speed and position control

2009
Many applications exist where something has to be controlled to follow a reference quantity. For example, the speed of a large motor may be set from a low-power control signal. This can be achieved using a variable-speed drive. Ideally, the relationship between the reference and the motor speed should be linear, and the speed should change instantly ...
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Accurate load positioning: static torque characteristics

2002
Most stepping motor applications involve accurate positioning of a mechanical load. For example, the position of a print head is defined very precisely by the number of switched excitation changes that have taken place in the controlling motor. External load torques, perhaps caused by friction, give rise to a small error in position when the motor is ...
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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
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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
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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
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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