Calibration of the DQI (Digital Quartz Inertial Measurements Unit)

Lloyd P. Stave

Abstract:	The DQI is a lowcost tactical grade Inertial Measurement Unit based on quartz gyro and accelerometer technology. The DQI is in pilot production at Rockwell’s El Paso production facility. Achieving performance over the military temperature range of -54C to +71C requires accurate calibration of temperature dependent bias, scale factor and input axis models. Cost considerations require this to be done in the minimum amount of time. A calibration technique will be described, which estimates the instrument model coefftcients from data obtained while simultaneously applying rate table motions and slewing the temperature through the 111 range. Estimates of the calibration accuracy will be shown along with data showing representative calibration residuals and lMU performance results. The calibration is currently implemented on the DQI production test equipment at Rockwell El Paso.
Published in:	Proceedings of the 52nd Annual Meeting of The Institute of Navigation (1996) June 19 - 21, 1996 Royal Sonesta Hotel Cambridge, MA
Pages:	607 - 615
Cite this article:	Stave, Lloyd P., "Calibration of the DQI (Digital Quartz Inertial Measurements Unit)," Proceedings of the 52nd Annual Meeting of The Institute of Navigation (1996), Cambridge, MA, June 1996, pp. 607-615.
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