alexa
Reach Us +44-1904-929220
On The Problem Of Jitter In Spacecraft | 19288
ISSN: 2168-9792

Journal of Aeronautics & Aerospace Engineering
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

2nd International Conference and Exhibition on Mechanical & Aerospace Engineering

Richard W Longman
Keynote: J Aeronaut Aerospace Eng
DOI: 10.4172/2168-9792.S1.001
Abstract
Spacecraft often require very accurate pointing. An extreme example is the Hubble Space Telescope whose design requirement was pointing to within 5 thousandth of an arc seconds. A new technology requiring accurate pointing is LaserCom currently being studied by NASA. It uses a laser beam instead of the usual antennae for the purpose of vastly increasing the bandwidth of communication channels. If LaserCom can be used for interplanetary communication to Mars, real time high definition television images could be transferred. However, the attitude or rotational control systems for spacecraft need actuators that involve rotating wheels-reaction wheels or control moment gyros. Inevitably these wheels have slight imbalance that cause vibrations or jitter of the spacecraft, e.g., making the laser beam wiggle. This presentation reports on a series of theoretical and experimental results, testing various intelligent or adaptive control methods, which aim to learn how to cancel the jitter at the location of the fine pointing instrument. For example, learn how to wiggle the output mirror of the laser so that the laser does not wiggle while the mirror is on a spacecraft that is vibrating.
Biography
Richard W Longman is Professor of Mechanical and Civil Engineering, Columbia University, and was Distinguished Romberg Guest Professor, University of Heidelberg, Germany. He received a 50,000 Euro Award for lifetime achievement in research from the Alexander von Humboldt Foundation, and the Dirk Brouwer Award from the American Astronautical Society (AAS) for contributions to spaceflight mechanics. He is Fellow of AAS and AIAA. He served the AAS as Vice President - Publications, VP Technical, First Vice President, and Member Board of Directors. His doctorate is from the University of California, San Diego, under Prof. R. E. Roberson who did the first study of satellite attitude control in 1951, 6 years before the first satellite. He has co-authored approximately 450 publications.
image PDF   |   image HTML
 

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2019-20
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri and Aquaculture Journals

Dr. Krish

[email protected]

+1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

ankara escort

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

pendik escort

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2019 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
Leave Your Message 24x7