Results 151 to 160 of about 5,073,723 (195)

The effect of torque and vertical position of maxillary canine on smile esthetics

American Journal of Orthodontics and Dentofacial Orthopedics, 2023
Regarding the key role of the maxillary canine in dynamic occlusion and smile esthetics, this study investigated the relation between smile esthetics and maxillary canine torque and vertical position from the viewpoint of orthodontists, general dentists, and laypersons.In this descriptive cross-sectional study, the close-up smile images have been ...
Alireza Haerian, Elaheh Rafiei, Pooya Fadaei Tehrani, Mohammad Hossein Toodehzaeim   +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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Position sensorless BDCM control with repetitive position-dependent load torque

2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2010
This paper addresses the position sensorless control for brushless DC motor (BDCM) with repetitive position-dependent load torque which is a function of the absolute rotor position (not incremental rotor position). The robust sensorless control is composed of sensorless control and robust speed control.
Hung-Chi Chen, Chih-Kai Huang
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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

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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Modeling and simulation of the induction motor with position-dependent load torque

42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475), 2004
This paper presents modeling and analysis of the operation of an induction motor loaded by a position-dependent load in order to derive an accurate time-invariant model. This model is developed in terms of variable frequency dynamic phasors. Comparisons with a more conventional model are carried out in order to illustrate the capabilities of the new ...
Emmanuel Delaleau, Aleksandar M. Stankovic   +1 more
openaire   +1 more source

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.
Farhad Aghili, Martin Buehler, John M. Hollerbach   +2 more
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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
Haibin Wu, Hongqing Zheng, Jianming Yang, Feng Li   +3 more
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A Position and Torque Switching Control Method for Robot Collision Safety

International Journal of Automation and Computing, 2018
With the increasing number of human-robot interaction applications, robot control characteristics and their effects on safety as well as performance should be taken account into the robot control system. In this paper, a position and torque switching control method was proposed to improve the robot safety and performance, when robots and humans work in
Zhijing Li 0004, Haibin Wu, Jianming Yang, Ming-Hao Wang, Jinhua Ye   +4 more
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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 ...
openaire   +1 more source