Adaptive control in an adaptive optics experiment with simulated turbulence-induced optical wavefronts

2009 ◽  
Author(s):  
Salman Monirabbasi ◽  
Steve Gibson
Keyword(s):  
Adaptive Control ◽  
Adaptive Optics

Adaptive control of woofer-tweeter adaptive optics

2009 ◽  
Author(s):  
Jimmie J. Perez ◽  
Gregory J. Toussaint ◽  
Jason D. Schmidt
Keyword(s):  
Adaptive Control ◽  
Adaptive Optics

Adaptive control in an adaptive optics experiment

2010 ◽  
Vol 27 (11) ◽  
pp. A84 ◽  
Author(s):  
Salman Monirabbasi ◽  
Steve Gibson
Keyword(s):  
Adaptive Control ◽  
Adaptive Optics

Augmentation of Fixed Gain Controlled Infinite Dimensional Systems With Direct Adaptive Control

2020 ◽  
Author(s):  
Mark J. Balas
Keyword(s):  
Hilbert Space ◽  
Adaptive Control ◽  
Adaptive Optics ◽  
Open Loop ◽  
Loop System ◽  
Linear Diffusion ◽  
Infinite Dimensional ◽  
Infinite Dimensional Systems ◽  
Transmission Zeros ◽  
Direct Adaptive Control

Abstract Linear infinite dimensional systems are described by a closed, densely defined linear operator that generates a continuous semigroup of bounded operators on a general Hilbert space of states and are controlled via a finite number of actuators and sensors. Many distributed applications are included in this formulation, such as large flexible aerospace structures, adaptive optics, diffusion reactions, smart electric power grids, and quantum information systems. In this paper, we focus on infinite dimensional linear systems for which a fixed gain linear infinite or finite dimensional controller is already in place. We augment this controller with a direct adaptive controller that will maintain stability of the full closed loop system even when the fixed gain controller fails to do so. We prove that the transmission zeros of the combined system are the original open loop transmission zeros, and the point spectrum of the controller alone. Therefore, the combined plant plus controller is Almost Strictly Dissipative (ASD) if and only if the original open loop system is minimum phase, and the fixed gain controller alone is exponentially stable. This result is true whether the fixed gain controller is finite or infinite dimensional. In particular this guarantees that a controller for an infinite dimensional plant based on a reduced -order approximation can be stabilized by augmentation with direct adaptive control to mitigate risks. These results are illustrated by application to direct adaptive control of general linear diffusion systems on a Hilbert space that are described by self-adjoint operators with compact resolvent.

Multi-Channel Adaptive Control Algorithm for Closed-Loop Adaptive Optics System

2013 ◽  
Vol 33 (3) ◽  
pp. 0301002 ◽  
Author(s):  
颜召军 Yan Zhaojun ◽  
李新阳 Li Xinyang ◽  
饶长辉 Rao Changhui
Keyword(s):  
Adaptive Control ◽  
Adaptive Optics ◽  
Control Algorithm ◽  
Closed Loop ◽  
Adaptive Control Algorithm ◽  
Adaptive Optics System
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