Results 251 to 260 of about 186,585 (293)

The contribution of gravitational torques to limb position sense

Experimental Brain Research, 1985
An experiment is reported which examined whether gravitational torque acting about a joint is used by the CNS in elbow joint angle matching. Subjects were required to match the joint angles of their two limbs while the external torques acting about each elbow were systematically varied. It was found that when the matching limb was differentially loaded,
C J, Worringham, G E, Stelmach
openaire   +2 more sources

Position Sensorless Direct Torque Control of SR Motors

2006 12th International Power Electronics and Motion Control Conference, 2006
Switched Reluctance motors (SR motors) have several desirable features, including simple construction, high reliability and low cost. But large torque ripple and expensive position sensors used in SR motor drive systems are considered as drawbacks for wide application. Several studies have succeeded in torque ripple reduction for SR motors using Direct
M. Mitani, H. Goto, H.-J. Guo, O. Ichinokura   +3 more
openaire   +1 more source

Position sensorless direct torque control of BLDC motor

2008 IEEE International Conference on Industrial Technology, 2008
Direct torque control (DTC) can directly control the inverter states in order to reduce the torque error within the prefixed band limit. DTC of brushless dc drive with trapezoidal back-EMF is presented in this paper. Using the rotor flux vector position in alpha-beta axis stationary reference frame and torque error, the proper switching pattern can be ...
G. R. Arab Markadeh, S. I. Mousavi, S. Abazari, A. Kargar   +3 more
openaire   +1 more source

An Accurate Torque-based Engine Control by Learning Correlation between Torque and Throttle Position

SAE Technical Paper Series, 2008
<div class="htmlview paragraph">In recent years, integrated vehicle control systems have been developed to improve fuel economy and safety. As a result, engine control is shifting to torque-based systems for throttle / fuel / ignition control, to realize an engine torque demand from the system.
Shinya Satou, Shinji Nakagawa, Hiromu Kakuya, Toshimichi Minowa, Mamoru Nemoto, Hitoshi Konno   +5 more
openaire   +1 more source

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
openaire   +3 more sources

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
openaire   +1 more source

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 ...
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source

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 ...
openaire   +1 more source