Results 261 to 270 of about 154,885 (280)

Resonance and Disturbance Rejection

2002
The prevalent trend in hard disk design is towards smaller hard disks with increasingly larger capacities. This implies that the track width has to be smaller, leading to lower error tolerance in the positioning of the head. The controller for track following has to achieve tighter regulation in the control of the servomechanism. To read (or write) the
Ben M. Chen, Tong H. Lee, Venkatakrishnan Venkataramanan   +2 more
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CALCULATING DYNAMIC DISTURBANCE REJECTION MEASURES

IFAC Proceedings Volumes, 2005
Abstract A number of indicators for the determination of the disturbance rejection capability of a system have been proposed in the literature in the last two decades. These tools are useful for evaluating early stage process designs and screening regulatory control structures, since they are based on minimal modelling requirements.
Morten Hovd, Ioannis K. Kookos
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Disturbance-rejection neural network control

Proceedings of 1993 International Conference on Neural Networks (IJCNN-93-Nagoya, Japan), 2005
A disturbance-rejection neural network control scheme is presented for control of an unknown nonlinear plant. In the scheme, a multilayer neural network is employed to learn the inverse dynamics of the unknown plant and acts as a feedforward controller to control the plant.
Y.M. Xiu, Z.Y. Zhao
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Adaptive disturbance estimation applied to harmonic disturbance rejection

Proceedings of the 1997 American Control Conference (Cat. No.97CH36041), 1997
The work presented was motivated by a control problem dealing with regulation of molten steel level during continuous casting. The process is such that influx is controlled based on feedback (liquid-) level measurements and feedforward (solidified-) efflux settings. Regulation of the liquid level to set-point is crucial to the quality of the solidified
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Experimental Studies in Disturbance Rejection

Dynamic Systems and Control: Volume 1 — Control Theory/Methodology; Robust Control; Applied Nonlinear Control Systems; QFT Designs in Industrial, Government, Academic Settings; Robot Control; Impedance Planning for Robotics; Haptic Interfaces for Virtual Environment/Teleoperator Systems; Intelligent Control Systems; Intelligent Process Control; Neural Networks, 1994
Abstract Experimental studies related to disturbance rejection features of neural control designs are reported using a DC motor system with friction in the plant and additive disturbance at the input. Static and dynamic neural schemes, as well as a proposed dynamic scheme are described.
Sanjay I. Mistry, Randal J. Hassler, Satish S. Nair   +2 more
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On a Disturbance Rejection Method

1991 American Control Conference, 1991
Linear time invariant single input single output control system system with disturbance is considered. This paper shows how to apply the delayed output feedback to the design of control systems with specific characteristics. In particular, this method is applied to meet the given transient requirements with disturbance rejection.
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Disturbance rejection dead-time controller

Proceedings of IEEE International Conference on Control and Applications CCA-94, 1994
This paper presents the results of an investigation conducted to evaluate alternative control schemes to maximize the disturbance rejection capability of a Smith-predictor based gauge feedback control system for a multistand aluminum rolling mill. The inherent transport-delay in the gauge controller makes it impossible to simultaneously improve low ...
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Disturbance rejection: A polynomial approach

IEEE Transactions on Automatic Control, 1983
A detailed analysis of the disturbance rejection problem in single-input single-output linear systems is presented. The analysis is based on an external polynomial model and employs the algebra of polynomials. All solutions are expressed in a parametric form and solvability conditions are given for a number of constraints including those of internal ...
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Rotor Resonance Disturbance Rejection Controller

Proceedings of the Vertical Flight Society 70th Annual Forum, 2014
A control system is proposed to actively suppress the resonant mode of a rotor drivetrain. A resonant suppression control loop is introduced in parallel with the speed governing control loop. This control loop receives a feedback signal from the free turbine and rotor speed.
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Disturbance Rejection

2017
Dierk Schröder, Martin Buss
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