Results 271 to 280 of about 38,287 (305)

Global Control of Linear Systems with Saturating Actuators

Automatica, 1998
Continuous-time linear systems with saturating actuators are considered. A gain-scheduling controller is introduced where the actuator characteristic is accounted for in the design of the controller. Several control problems, e.g. global asymptotic stabilization, disturbance rejection, robust stabilization, etc. are treated in this paper.
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Linear conditioning for systems containing saturating actuators

Automatica, 2000
A system composed of a linear controller and plant can exhibit strange behaviour when the actuators linking the controller to the plant are subject to saturation, or other nonlinear effects. Linear conditioning means augmenting the system with a linear transfer function to change the system's behaviour during, and immediately following, saturation.
Weston, Paul F., Postlethwaite, Ian
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Exponentially Unstable Plants With Saturating Actuators

2002
Abstract : Every physical actuator is subject to saturation. For this reason, the original formulations of many fundamental control problems, including controllability and time optimal control, all reflect the constraints imposed by actuator saturation.
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Command Shapers for Systems with Actuator Saturation

2007 American Control Conference, 2007
Command shapers are used to create inputs that move flexible systems without residual vibration. Originally developed for linear systems, command shapers use superposition of the inputs to cancel vibration and control the system response. Nonlinearities in the system degrade the performance of traditional command shapers.
Michael J. Robertson, R. Scott Erwin
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Control of linear systems with saturating actuators

Proceedings of 1995 American Control Conference - ACC'95, 1996
The paper deals with (linear) systems of the form \(\dot x = Ax + B \sigma (u + g(x,t))\), \(y = Cx\), with \(x,u\) and \(y\) the state-, input- and output vector; \(\sigma\) is a saturation function and \(g\) represents the uncertainties/disturbances in the system.
Saberi, Ali, Lin, Zongli, Teel, Andrew R.   +2 more
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Multiscale optimization of saturated poroelastic actuators

2011
A multiscale method for optimizing the material micro structure in a macroscopically heterogeneous saturated poroelastic media with respect to macro properties is presented. The method is based on topology optimization using the homogenization technique, here applied to the optimization of a bi-morph saturated poroelastic actuator.
Andreasen, Casper Schousboe, Sigmund, Ole   +1 more
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Attitude control with active actuator saturation prevention

Acta Astronautica, 2015
Abstract Spacecraft attitude control in the presence of actuator saturation is considered. The attitude controller developed has two components: a proportional component and an angular velocity component. The proportional control has a special form that depends on the attitude parameterization.
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Robust learning control method in saturating actuators

KSME International Journal, 1999
Anti-reset windup is an important tool in the practical implementation of integral controllers. Integral control can have poor performance due to windup of the integral during transient periods when the actuator is operating at its saturation limit.
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Adaptive spacecraft formation flying with actuator saturation

Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 2010
This paper presents a non-linear adaptive controller for the multiple spacecraft formation flying problem. The formulation allows for gravitational field models of arbitrary order, and a broad class of linearly parameterized external disturbance force models. This paper builds upon previous results using feedback of the filtered error.
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Adaptive Spacecraft Attitude Control with Actuator Saturation

Journal of Guidance, Control, and Dynamics, 2010
P RACTICAL spacecraft attitude control systems must operate in the presence of disturbances, modeling errors, and actuator limitations. These issues have been the subject of much research interest. Adaptive control, where the unknown system parameters are estimated adaptively, is one of the proposed approaches for dealing with modeling uncertainty (see,
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