Results 221 to 230 of about 6,176 (260)

On electrodynamical compensation of a torque disturbing satellite orientation

2015 International Conference "Stability and Control Processes" in Memory of V.I. Zubov (SCP), 2015
A satellite with electrodynamic attitude control system is considered. The problem of compensation of an external disturbing torque is solved. The optimization of control process in vicinity of programmed motion is achieved on the basis of control system without involving additional measuring devices.
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Intelligent Controllers in Path Tracking of a Manipulator with Bounded Disturbance Torque

2013
Sliding mode controller (SMC) is an effective motion control strategy for robotic manipulator systems, which can ensure globally asymptotic stability. However, SMC suffer from chattering problem and a-priori knowledge of upper bound of the uncertainty is required for its effectiveness.
Neha Kapoor, Jyoti Ohri
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Torque disturbance rejection in high accuracy tracking systems

IEEE Transactions on Aerospace and Electronic Systems, 1990
The possibility of rejecting torque disturbances that degrade the pointing and tracking accuracy of electromechanical pedestals and general two-axis systems used for target acquisition and robotics is discussed. Torque rejection achieved through disturbance estimation and compensation results in a vast improvement in pointing accuracy. For the class of
J.A. Profeta, W.G. Vogt, M.H. Mickle
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Reducing Disturbances Caused by Reductions in Regenerative Brake Torque

SAE Technical Paper Series, 2011
<div class="section abstract"><div class="htmlview paragraph">This paper presents a method to reduce the number of occurrences of vehicle deceleration disturbances due to the reduction of regenerative braking in the presence of wheel slip. Usually, regenerative braking is disabled when wheel slip is detected in order to allow the ABS system
Eric Krueger, Kevin Kidston, Adam Busack
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Manufacturing Errors Effects on Disturbing Torque of Aerostatic Bearings

Applied Mechanics and Materials, 2009
In order to improve the drifting accuracy of aerostatic bearings, the manufacturing errors effects on disturbing torque of aerostatic bearings is studied by using the finite element method. The finite element mathematic model of the major influence factors of disturbing torque is established.
Jing Shi Liu, Ya Zhou Sun, Li Hua Lu, Ying Chun Liang   +3 more
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Rejection of nonlinear disturbance torque in servomechanism with repetitive control

IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02, 2003
In this paper, a repetitive control method is presented for the rejection of significant nonlinear disturbance torque in servomechanisms. The disturbance torque dealt with is assumed to be periodic in position, which is the main cause for the degradation of the system steady-state precision. A sufficient condition for stability is given.
null Dongchun Zhang, null Ming Zeng, null Baoku Su   +2 more
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Tracking control of time-varying knee exoskeleton disturbed by interaction torque

ISA Transactions, 2017
Knee exoskeletons have been increasingly applied as assistive devices to help lower-extremity impaired people to make their knee joints move through providing external movement compensation. Tracking control of knee exoskeletons guided by human intentions often encounters time-varying (time-dependent) issues and the disturbance interaction torque ...
Zhan, Li, Wenhao, Ma, Ziguang, Yin, Hongliang, Guo   +3 more
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Sensorless vector control of synchronous reluctance motors with disturbance torque observer

APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058), 2001
The elimination of the position sensor has been one important requirement in vector control systems because the position sensor spoils the reliability and simplicity of drive systems. Therefore, we present a sensorless vector control technique for synchronous reluctance motors. The rotor position is calculated easily from ds-qs-axes flux linkages which
Tomonobu Senjyu, Takeshi Shingaki, Katsumi Uezato   +2 more
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Analysis of estimation error of observer for disturbance torque and velocity

Electrical Engineering in Japan, 1994
AbstractThis paper analyzes some features of estimation error of the observer which estimates disturbance torque and velocity. This observer inputs the information of driving torque and current position, and outputs the information of disturbance torque and velocity.Although this observer is a practical tool to compose a robust control system, there ...
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Switching Position-Torque Control for Series Elastic Actuators with Disturbance Observer

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
This paper proposes a novel switch control for the series elastic actuator (SEA). This switch control provides more robust position control along with better impulse dissipation performance. SEA is an actuator technology commonly used in robotic applications that require safe and precise interaction control.
Minjae Jo, Hyunwook Lee, Sehoon Oh
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