Výsledky vyhledávání - "Dean W. Sparks"

Fault Accommodation in Control of Flexible Systems

Autor: Peiman G. Maghami, Kyong B. Lim, Dean W. Sparks

Publikováno v: Journal of Guidance, Control, and Dynamics. 21:500-507

New synthesis techniques for the design of fault accommodating controllers for flexible systems are developed. Three robust control design strategies, static dissipative, dynamic dissipative and mu-synthesis, are used in the approach. The approach pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d49777f7a4ef5858273550cce5bf0092
https://doi.org/10.2514/2.4265

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Application of piezoelectric devices to vibration suppression

Autor: Chin Chung Won, W. Keith Belvin, Dean W. Sparks, Jeffrey L. Sulla

Publikováno v: Journal of Guidance, Control, and Dynamics. 17:1333-1338

Embedded piezoelectric devices may be ideally suited for vibration control of space structures, which lack an inertial ground. When subjected to an input voltage, an embedded piezoelectric actuator changes its dimensions, which in turn generates a pa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc24e449831c6b49a4683b4dace3482f
https://doi.org/10.2514/3.21352

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Survey of experiments and experimental facilities for control of flexible structures

Autor: Dean W. Sparks, Jer-Nan Juang

Publikováno v: Journal of Guidance, Control, and Dynamics. 15:801-816

This paper presents a survey of ground experiments primarily conducted in the United States and U.S. facilities dedicated to the study of active control of flexible structures. The facilities are briefly described in terms of capability, configuratio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d31cfc1677bd748ac216a66493056a39
https://doi.org/10.2514/3.20912

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Orion Crew Exploration Vehicle Launch Abort System Guidance and Control Analysis Overview

Autor: Deborah S. Merritt, Ryan W. Proud, Vanessa V. Aubuchon, Ronald C. Busan, Sungwan Kim, John B. Davidson, David L. Raney, Dean W. Sparks

Publikováno v: AIAA Guidance, Navigation and Control Conference and Exhibit.

Aborts during the critical ascent flight phase require the design and operation of Orion Crew Exploration Vehicle (CEV) systems to escape from the Crew Launch Vehicle (CLV) and return the crew safely to the Earth. To accomplish this requirement of co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::feb413ebf404902fe9abf081101637f4
https://doi.org/10.2514/6.2008-7148

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Design of neural networks for fast convergence and accuracy

Autor: Dean W. Sparks, Peiman G. Maghami

Publikováno v: 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit.

A novel procedure for the design and training of artificial neural networks, used for rapid and efficient controls and dynamics design and analysis for flexible space systems, has been developed. Artificial neural networks are employed to provide a m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6a374dcbb50c1d4cc37fc07f2351d97
https://doi.org/10.2514/6.1998-1780

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Neural networks for rapid design and analysis

Autor: Peiman G. Maghami, Dean W. Sparks

Publikováno v: 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit.

Artificial neural networks have been employed for rapid and efficient dynamics and control analysis of flexible systems. Specifically, feedforward neural networks are designed to approximate nonlinear dynamic components over prescribed input ranges,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efbc7ac9e6f112cbf0712434e2b7cdcd
https://doi.org/10.2514/6.1998-1779

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On the isolation of science payloads from spacecraft vibrations

Autor: Lucas G. Horta, Kenny B. Elliott, W. Keith Belvin, Dean W. Sparks

Publikováno v: 36th Structures, Structural Dynamics and Materials Conference.

The remote sensing of the Earth's features from space requires precision pointing of scientific instruments. To this end, the NASA Langley Research Center has been involved in developing numerous controlled structures technologies. This paper describ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23ba274e315c7f986e06f2ad17de1111
https://doi.org/10.2514/6.1995-1234

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Application of piezoelectric devices to vibration suppression - Frommodeling and controller designs to implementation

Autor: Dean W. Sparks, Chin Won, Keith Belvin, Jeff Sulla

Publikováno v: Astrodynamics Conference.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ea528d1adaa6903943ab6da3881e01b
https://doi.org/10.2514/6.1992-4610

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A survey of experiments and experimental facilities for control of flexible structures

Autor: Gerhard J. Klose, Jer-Nan Juang, Dean W. Sparks

Publikováno v: Guidance, Navigation and Control Conference.

This paper presents a survey of U.S. ground experiments and facilities dedicated to the study of active control of flexible structures. The facilities will be briefly described in terms of capability, configuration, size and instrumentation. Topics o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::976eca55763d7f1b4ea1b3b5892b03e9
https://doi.org/10.2514/6.1989-3567

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