Journal•ISSN: 2075-1087
Gyroscopy and Navigation
Springer Science+Business Media
About: Gyroscopy and Navigation is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Inertial navigation system & GNSS applications. It has an ISSN identifier of 2075-1087. Over the lifetime, 476 publications have been published receiving 3250 citations.
Topics: Inertial navigation system, GNSS applications, Gyroscope, Inertial measurement unit, Global Positioning System
Papers
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TL;DR: The micro-NMR-Gyro as mentioned in this paper is an inertial measurement unit with a power draw of only a few watts that was developed by Northrop Grumman for the purpose of providing the end user with a high performance device in a small robust package.
Abstract: Since its discovery by Isidor Rabi in 1938 and his subsequent Nobel Prize in physics in 1944, scientists have been using nuclear magnetic resonance (NMR) technologies as a tool in analytic chemistry, biochemistry, and the study of atomic interactions. In 1952 General Electric proposed that a gyro could be made based on NMR technology, in particular the concept of using the intrinsic quantum property of spin was of interest, specifically the stability of a quantized angular momentum of a nucleus when subjected to a stable magnetic field. From roughly 1952 to 1980 several groups worked on the concept and development of an NMR based gyro, with some being more successful than others. While the fundamentals of the technology were understood and the concept demonstrated, the enabling technologies required to develop a compact, robust design that would operate outside of the controlled laboratory environment were not available. For the past several years Northrop Grumman has been investigating and developing a NMR-Gyro. Owing to the advancement in enabling technologies a small robust gyro package can now be produced. The current micro-NMRG design is housed in a 10 cubic centimeter package and has been tested over a limited environment. Projected size estimate for a 6 degree-of-freedom inertial measurement unit is on the order of 300 cc with a power draw of a few watts. Initial testing of the unit has shown a performance level better than any MEMS device currently available as well as approaching the performance of many fiber optic gyros. The micro-NMR-Gyro has the potential to provide the end user a high-performance device in a small robust package. Presented in this paper is a summary of the basic principles of operation and performance testing results of the hardware to date.
112 citations
TL;DR: In this paper, the best short-term sensitivity was obtained without any ground vibration isolation system with such an instrument: 10−8 m s−2 in 100 s measurement time.
Abstract: Low noise underground environments offer conditions allowing assessment of ultimate performance of high sensitivity sensors such as accelerometers, gyrometers, seismometers⋯ Such facilities are for instance ideal for observing the tiny signals of interest for geophysical studies. Laboratoire Souterrain a Bas Bruit (LSBB) in which we have installed our cold atom gravimeter provides such an environment. We report here the best short term sensitivity ever obtained without any ground vibration isolation system with such an instrument: 10−8 m s−2 in 100 s measurement time.
80 citations
TL;DR: The GAIN (Gravimetric Atom Interferometer) as mentioned in this paper is a mobile and robust gravimeter based on interfering ensembles of laser cooled 87Rb atoms in an atomic fountain configuration.
Abstract: We present the new mobile and robust gravimeter GAIN (Gravimetric Atom Interferometer), which is based on interfering ensembles of laser cooled 87Rb atoms in an atomic fountain configuration. With a targeted accuracy of a few parts in 1010 for the measurement of local gravity, g, this instrument should offer about an order of magnitude improvement in performance over the best currently available absolute gravimeters. Together with the capability to perform measurements directly at sites of geophysical interest, this will open up the possibility for a number of interesting applications.
71 citations
TL;DR: In this paper, an overview of the research and development of gyroscopic technologies in Russia in the past 15 years is presented, and the current status and prospects for advancement of inertial technologies in the future are analyzed.
Abstract: The article presents an overview of the research and development of gyroscopic technologies in Russia in the past 15 years. The current status and prospects for advancement of inertial technologies in the future are analyzed.
54 citations
TL;DR: The Sagem marine AHRS BlueNaute as discussed by the authors is a very compact gyro with a very low number of components, which is used for inertial navigation on a marine vessel.
Abstract: Sagem improvements made in the design, the process and the control of the HRG help to reach high performance while keeping the intrinsic simplicity of the Coriolis Vibrating Gyros family. Therefore it allows the HRG to challenge the laser gyros for strapdown inertial navigation. The simplicity derives from many patented innovations which lead to a very compact gyro with a very low number of components. The manufacturing takes advantage of this simplified design and of a new automatic tuning and balancing process which reduces sensitivities to mechanical environment. While using a Whole Angle mode of control which leads to very good scale factors, a new full digital electronics provides gain and phase accuracy at the level needed by the 0.01°/h class of bias performance. The paper explains these choices and presents the results obtained by the Sagem HRG during tests. Thanks to these characteristics, new applications are developed, especially when compactness, low consumption, reliability and maintenance free long term performance are needed as it is the case with Marine Gyrocompass or Marine Attitude and Heading Reference Systems. The architecture of the Sagem marine AHRS BlueNaute™ is presented and many test results are given, including those obtained on marine vessel.
54 citations