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collection:
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nasa new
collection
nasa new
collection
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mediatype:
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texts
mediatype
texts
mediatype
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collection:
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nasa_techdocs
collection
nasa_techdocs
collection
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title:
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Stochastic Control Synthesis of Systems with Structured Uncertainty
title
Stochastic Control Synthesis of Systems with Structured Uncertainty
title
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description:
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This paper presents a study on the design of robust controllers by using random variables to model structured uncertainty for both SISO and MIMO feedback systems. Once the parameter uncertainty is prescribed with probability density functions, its effects are propagated through the analysis leading to stochastic metrics for the system's output. Control designs that aim for satisfactory performances while guaranteeing robust closed loop stability are attained by solving constrained non-linear optimization problems in the frequency domain. This approach permits not only to quantify the probability of having unstable and unfavorable responses for a particular control design but also to search for controls while favoring the values of the parameters with higher chance of occurrence. In this manner, robust optimality is achieved while the characteristic conservatism of conventional robust control methods is eliminated. Examples that admit closed form expressions for the probabilistic metrics of the output are used to elucidate the nature of the problem at hand and validate the proposed formulations.
description
This paper presents a study on the design of robust controllers by using random variables to model structured uncertainty for both SISO and MIMO feedback systems. Once the parameter uncertainty is prescribed with probability density functions, its effects are propagated through the analysis leading to stochastic metrics for the system's output. Control designs that aim for satisfactory performances while guaranteeing robust closed loop stability are attained by solving constrained non-linear optimization problems in the frequency domain. This approach permits not only to quantify the probability of having unstable and unfavorable responses for a particular control design but also to search for controls while favoring the values of the parameters with higher chance of occurrence. In this manner, robust optimality is achieved while the characteristic conservatism of conventional robust control methods is eliminated. Examples that admit closed form expressions for the probabilistic metrics of the output are used to elucidate the nature of the problem at hand and validate the proposed formulations.
description
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subject:
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PREFORMS
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subject:
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LAUNCHING
subject
LAUNCHING
subject
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subject:
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INSPECTION
subject
INSPECTION
subject
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subject:
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LININGS
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subject:
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POWDER (PARTICLES)
subject
POWDER (PARTICLES)
subject
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subject:
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MANUFACTURING
subject
MANUFACTURING
subject
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subject:
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ROLL
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subject:
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LIQUID PROPELLANT ROCKET ENGINES
subject
LIQUID PROPELLANT ROCKET ENGINES
subject
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subject:
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MACHINING
subject
MACHINING
subject
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subject:
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FRICTION STIR WELDING
subject
FRICTION STIR WELDING
subject
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subject:
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CHROMIUM ALLOYS
subject
CHROMIUM ALLOYS
subject
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subject:
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NIOBIUM ALLOYS
subject
NIOBIUM ALLOYS
subject
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subject:
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TOOLING
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identifier:
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nasa_techdoc_2004007 4229
identifier
nasa_techdoc_2004007 4229
identifier
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licenseurl:
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uploader:
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gwilliam@archive.org
uploader
gwilliam@archive.org
uploader
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addeddate:
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2011-06-02 08:10:11
addeddate
2011-06-02 08:10:11
addeddate
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publicdate:
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2011-06-02 08:10:11
publicdate
2011-06-02 08:10:11
publicdate
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creator:
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Crespo, Luis G
creator
Crespo, Luis G
creator
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ImageUID:
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file:/home/lunaadmin /Source_download/201 106/1/nasa_techdoc_2 0040074229/200400742 29.pdf
ImageUID
file:/home/lunaadmin /Source_download/201 106/1/nasa_techdoc_2 0040074229/200400742 29.pdf
ImageUID
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date:
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2003-12-01
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rights:
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Public Domain
rights
Public Domain
rights
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ppi:
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600
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year:
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2003
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language:
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eng
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document-source:
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CASI
document_source
CASI
document-source
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documentid:
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20040074229
documentid
20040074229
documentid
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nasa-center:
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Langley Research Center
nasa_center
Langley Research Center
nasa-center
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online-source:
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http://wayback.archi ve-it.org/1792/20100 213232434/http://hdl .handle.net/2060/200 40074229
online_source
http://wayback.archi ve-it.org/1792/20100 213232434/http://hdl .handle.net/2060/200 40074229
online-source
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original-nasa-rights:
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Unclassified; No Copyright; Unlimited; Publicly available;
original_nasa_rights
Unclassified; No Copyright; Unlimited; Publicly available;
original-nasa-rights
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updated-added-to-ntrs:
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2008-06-02
updated_added_to_ntr s
2008-06-02
updated-added-to-ntr s
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contributor:
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NASA
contributor
NASA
contributor
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identifier-access:
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identifier_access
identifier-access
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identifier-ark:
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ark:/13960/t1fj3br0r
identifier_ark
ark:/13960/t1fj3br0r
identifier-ark
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ocr:
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ABBYY FineReader 8.0
ocr
ABBYY FineReader 8.0
ocr
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repub_state:
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4
repub_state
4
repub_state
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