| タイトル | Shifting the Intertial Navigation Paradigm with the MEMS Technology |
| 本文（外部サイト） | http://hdl.handle.net/2060/20100005703 |
| 著者（英） | Bishop, Robert H.; Brady, Tye; Crain, Timothy P., II |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2010-01-06 |
| 言語 | eng |
| 内容記述 | "Why don't you use MEMS?" is of the most common questions posed to navigation systems engineers designing inertial navigation solutions in the modern era. The question stems from a general understanding that great strides have been made in terrestrial MEMS accelerometers and attitude rate sensors in terms of accuracy, mass, and power. Yet, when compared on a unit-to-unit basis, MEMS devices do not provide comparable performance (accuracy) to navigation grade sensors in several key metrics. This paper will propose a paradigm shift where the comparison in performance is between multiple MEMS devices and a single navigation grade sensor. The concept is that systematically, a sufficient number of MEMS sensors may mathematically provide comparable performance to a single navigation grade device and be competitive in terms power and mass allocations when viewed on a systems level. The implication is that both inertial navigation system design and fault detection, identification, and recovery could benefit from a system of MEMS devices in the same way that swarm sensing has benefited Earth observation and astronomy. A survey of the state of the art in inertial sensor accuracy scaled by mass and power will be provided to show the scaled error in MEMS and navigation graded devices, a mathematical comparison of multi-unit to single-unit sensor errors will be developed, and preliminary application to an Orion lunar skip atmospheric entry trajectory will be explored. |
| NASA分類 | Spacecraft Instrumentation and Astrionics |
| レポートNO | JSC-CN-19574 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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