Results 211 to 220 of about 6,176 (260)

Performance Analysis of a High-Bandwidth Torque Disturbance Compensator

IEEE/ASME Transactions on Mechatronics, 2004
Recent availability of encoder with millions of counts per revolution makes it possible to enlarge the bandwidth of the torque disturbance observer (TDO) equipping a servo drive. As a consequence, the TDO dynamics are no more decoupled from those of current and the behavior of the torque disturbance compensator (TDC) is influenced by the current ...
M Bertoluzzo
exaly   +2 more sources

Adaptive feedforward control for disturbance torque rejection in seeker stabilizing loop

IEEE Transactions on Control Systems Technology, 2001
Important sources of disturbance torque inputs, which may severely degrade the seeker tracking accuracy of a guided missile, involve seeker mass imbalance, seeker gimbal friction, and seeker head restoring torque. The paper presents an approach to treat the disturbance rejection problem for the missile seeker.
Chun-Liang Lin, Yi-Hsing Hsiao
exaly   +2 more sources

Disturbance torque estimation in a sensorless DC drive

IEEE Transactions on Industrial Electronics, 1995
The estimation of the disturbance torque in a sensorless DC drive is carried out by extending the classical observer theory. Three estimation schemes are formulated according to the representation of the disturbance torque and processing of the observer states.
G. Buja, MENIS, ROBERTO, M. I. Valla
openaire   +3 more sources

Steering Torque Disturbance Rejection

SAE International Journal of Vehicle Dynamics, Stability, and NVH, 2017
<div class="section abstract"><div class="htmlview paragraph">The layout of a vehicle steering system has to resolve a compromise. While it is important for lateral vehicle control to feel steering torque feedback of lateral tire to ground interaction, disturbing forces shall not be present in the feedback steering torque.
Jens Dornhege, Simon Nolden, Martin Mayer   +2 more
openaire   +1 more source

Torque disturbances and their effect on process control

Proceedings of 5th International Conference on Power Electronics and Variable-Speed Drives, 1994
The paper seeks to demonstrate the deleterious effects that torque disturbances can have on an industrial process where close control of speed is required to maintain product quality. The paper also highlights the type of disturbance arising from driven equipment as well as those generated from a variety of different types of drive used for variable ...
openaire   +1 more source

Sliding mode of control of flexible spacecraft under disturbance torque

International Journal of Systems Science, 1990
A control system design is presented for large angle rotational manoeuvres of a spacecraft-beam-tip body (an antenna or a reflector) configuration. Although this approach is applicable to three-axis manoeuvres, for simplicity only single-axis control is treated here. It is assumed that an unknown but bounded disturbance torque acts on the spacecraft. A
Iyer, Ashok, Singh, Sahjendra N.
openaire   +1 more source

Nonlinear Attitude Control of an Underactuated Spacecraft Subject to Disturbance Torques

2007 American Control Conference, 2007
We propose a procedure to correct and stabilize the orientation of a spacecraft subjected to an external disturbance torque, using only two available control torques. A corrective maneuver that best satisfies the objectives of the mission is first determined, and a nonlinear controller is developed to stably implement the corrective maneuver.
Mohammad Azim Karami, Farrokh Sassani
openaire   +1 more source

Nonlinear Control of Induction Motors: Torque Tracking with Unknown Load Disturbance

1992 American Control Conference, 1992
Ortega and Espinosa (1993) presented a globally stable controller for torque regulation of a complete induction motor model with partial state feedback, i.e., no assumption of flux measurement. The result was established under the assumptions that both the desired and load torques are constant, that the former does not exceed certain bounds which ...
Romeo Ortega, Carlos Canudas, Seleme I. Seleme   +2 more
openaire   +1 more source

Deadbeat Predictive Direct Torque and Active Flux Control with Disturbance Observer

IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, 2021
This paper proposes a new framework for the deadbeat predictive direct torque control for interior permanent magnet synchronous machine (IPMSM) utilizing active flux. Unlike the existing deadbeat predictive direct torque and stator flux control, it is relatively simple and does not require to neglect any physical quantities such as stator resistance ...
Sayed Mohammad Showybul Islam Shakib, Dan Xiao, Rukmi Dutta, Muhammed Fazlur Rahman   +3 more
openaire   +1 more source