Download or read book tude et r alisation d un oscillateur quartz tr s basse temp rature written by Gabriel Mossuz and published by . This book was released on 1975 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE D'OSCILLATEURS A QUARTZ DEVANT FONCTIONNER A TRES BASSE TEMPERATURE. L'ECART DE FREQUENCE D'OSCILLATION ENREGISTRE PEUT ETRE CORRIGE EN REALISANT A LA T AMBIANTE DES QUARTZ DE FREQUENCE CONVENABLE. UTILISATION D'UN MATERIEL CRYOGENIQUE TRES EVOLUE. ETUDE DU VIEILLISSEMENT DES RESONATEURS A QUARTZ ET DES COMPOSANTS ELECTRONIQUES AUX T CRYOGENIQUES. ETUDE DE LA STABILITE A COURT TERME. ETUDE DU RESONATEUR ET DE L'ELECTRONIQUE DE L'OSCILLATEUR, L'UTILISATION DE TRES BASSES TEMPERATURES DOIT PERMETTRE D'AMELIORER LES STABILITES.

Download or read book ETUDE DE RESONATEURS ET D OSCILLATEURS A QUARTZ A TRES BASSES TEMPERATURES written by ABDELLATIF.. EL HABTI and published by . This book was released on 1993 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE TRAITE, EN SA MAJEURE PARTIE, DE LA MESURE DU COEFFICIENT DE QUALITE DES RESONATEURS A QUARTZ AYANT SUBI DIFFERENTS TRAITEMENTS DE SURFACE. LES MESURES SONT EFFECTUEES ENTRE 300 K ET 1,4 K ET POUR DIFFERENTS PARTIELS. ON MONTRE QU'EN DESSOUS DE 20 K, L'INVERSE DU COEFFICIENT DE QUALITE EST LA SOMME D'UN TERME EN T PUISSANCE 4 ATTRIBUE A L'ATTENUATION INTRINSEQUE DU CRISTAL DE QUARTZ ET D'UN TERME CONSTANT. CE DERNIER TERME QUI VARIE CONSIDERABLEMENT D'UN QUARTZ A UN AUTRE EST ATTRIBUE A LA RUGOSITE EN SURFACE, A LA PRESENCE D'UNE COUCHE AMORPHE EN SURFACE ET EVENTUELLEMENT A L'AMORTISSEMENT PAR LES SUPPORTS. CE RESULTAT EST OBTENU APRES EVALUATION PAR DES MODELES THEORIQUES D'UNE PART ET D'AUTRE PART PAR DES EXAMENS SUR DES RESONATEURS DONT LES QUARTZ ONT ETE ANALYSES AUX RAYONS X ET PAR UNE METHODE D'INTERFEROMETRIE POUR LE CONTROLE DE L'ETAT DE SURFACE. LA SECONDE PARTIE DE CE TRAVAIL EST CONSACREE A LA REALISATION D'UN OSCILLATEUR QUI FONCTIONNE AUSSI BIEN A LA TEMPERATURE AMBIANTE QU'A TRES BASSE TEMPERATURE. CET OSCILLATEUR A PERMIS DE MESURER LA VARIATION DE LA FREQUENCE EN FONCTION DE LA TEMPERATURE POUR DIFFERENTES COUPES DE QUARTZ A SIMPLE ROTATION. ON TROUVE POUR T INFERIEURE A 15 K UNE VARIATION DE FREQUENCE DE L'ORDRE DE 1 HZ PAR #OK

Download or read book Strap down Inertial Systems written by and published by . This book was released on 1978 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Satellite Situation Report written by Goddard Space Flight Center. Office of Public Affairs and published by . This book was released on 1977 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frequency and Time written by P. Kartaschoff and published by . This book was released on 1978 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inertial Navigation Systems Analysis written by Kenneth Robert Britting and published by GNSS Technology and Applicatio. This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Out-of-print for years, this highly sought-after volume, remains the most popular reference on inertial navigation systems analysis. Finally, this classic book is back in print and readily available only from Artech House. Authored by a pioneer in the field, this authoritative resource focuses on terrestrial navigation, but is also useful for air and sea applications. Packed with valuable, time-saving equations and models, the book helps engineers design optimal navigation systems by comparing the performance of the various types of system mechanizations. Although applications and technology have changed over the years, this book remains the best source for fundamental inertial navigation system knowledge, from notational conventions, reference frames, and geometry of the earth, to unified error analysis, self-alignment techniques, and the development of a system error model. This well-illustrated, timeless reference belongs on the shelf of every practicing engineer working in this area.

Download or read book Laser cooled and Trapped Atoms written by and published by . This book was released on 1983 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Space Debris written by Heiner Klinkrad and published by Springer Science & Business Media. This book was released on 2006-09-01 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future evolution of the debris environment will be forecast on the basis of traffic models and possible hazard mitigation practices. The text shows how large trackable objects will have re-entry pinpointed and predictions made on related risk assessment for possible ground impact. Models will also be described for meteoroids which are also a prevailing risk.

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Download or read book Guidance and Control of Aerospace Vehicles written by Cornelius T. Leondes and published by . This book was released on 2013-09 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theory and Applications of Kalman Filtering written by Cornelius T. Leondes and published by . This book was released on 1970 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Linear estimation theory; Further comments on the derivation of Kalman filters; Computational techniques in Kalman filtering; Modeling errors in Kalman filters; Suboptimal Kalman filter techniques; Comparison of Kalman, Bayesian and maximum likelihood estimation techniques; Nonlinear filtering and comparison with Kalman filtering; Linear smoothing techniques (post-flight data analysis); Nonlinear smoothing techniques; General questions on Kalman filtering in navigation systems; Application of Kalman filtering theory to augmented inertial navigation systems; Application of Kalman filtering to Baro/inertial height systems; Application of Kalman filtering to the C-5 guidance and control system; Application of Kalman filtering techniques to the Apollo program; Some applications of Kalman filtering in space guidance; Application of Kalman filtering for the alighnment of carrier aircraft inertial navigation systems; Navigation at sea using the invariants form of Kalman filtering; Marine applications of Kalman filtering; Optimal use of redundant information in an inertial navigation; Application of Kalman filtering techniques to strapdown system initia-alignment; and A Kalman filter augmented marine navigation system.