MMQ-G, A Low Cost MEMS INS-GPS

Randall Jaffe, Honghui Qi, Phil Carter and Asad M. Madni

Abstract:	Quartz MEMS sensors have come into their own, with productions rates now exceeding 20,000 gyros per day and in excess of 18 million gyros shipped world wide. The maturity, versatility and robustness of these low cost sensors have been proven in numerous applications including unmanned aerial vehicles and imaging systems. The same sensing element has been used as a component in secondary attitude display for commercial aviation, seeker stabilization for guided munitions, stability control and rollover prevention for automobiles and most recently as the inertial instruments for an extremely small low cost Global Positioning System (GPS) aided Inertial Navigation System (INS). This paper provides a detailed description of the MMQ-G, a navigation system that employs quartz rate sensors and commercially available components to create a small robust INS-GPS system. It also includes a description of the system’s architecture including details on the electrical and mechanical configuration. The paper concludes with system test data demonstrating the accuracy and robustness of the MMQ-G. The data presented includes real world test conditions including loss of GPS, shock and, vibration. Data plots show some of the available system outputs. For example the system’s position, attitude and velocity are plotted as a function of time. Two cases are considered. The first case demonstrates the system performance while a valid GPS signal is available. The second case demonstrates the system performance where GPS had been acquired and was later temporarily unavailable. The paper analyzes the system response prior to the loss of GPS, during the time that GPS was unavailable and finally the system’s response after GPS was reacquired and updates were again available to the Kalman filter.
Published in:	Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) September 13 - 16, 2005 Long Beach Convention Center Long Beach, CA
Pages:	956 - 966
Cite this article:	Jaffe, Randall, Qi, Honghui, Carter, Phil, Madni, Asad M., "MMQ-G, A Low Cost MEMS INS-GPS," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 956-966.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In