Digital Quartz IMU - Navigation Processor (DQI-NP) Design and Performance

Michael K. Martin, Bruce C. Detterich

Abstract:	A wide variety of applications can benefit from integrated Inertial Navigation System/Global Positioning System (INS/GPS) technology. However, in many situations the end user has a preference for a specific GPS receiver. Additionally, in most cases, the user does not desire to expend the time and money necessary to perform a custom INS/GPS integration, but instead wants a low cost off-the-shelf solution. To address these applications, Boeing has developed the Digital Quartz IMU -Navigation Processor (DQI-NP) product as an extension of its Miniature Integrated GPS/INS Tactical System (MIGITSä) family of integrated INS/GPS products. This paper describes the DQI-NP product architecture, overall design approach, and development history. DQI-NP development is complete, and the product is currently in low rate production. The DQI-NP design is described in more detail, along with key performance parameters. The DQI-NP consists of production solid state DQI hardware, with the addition of a navigation processor adapter (NPA). The NPA provides input/output (I/O) level conversion and electromagnetic interference (EMI) filtering for interfacing with the DQI. INS/GPS software resides within the DQI, and provides either loose or tight coupling, depending on the application. The standard data protocol employs the Precision Lightweight GPS Receiver (PLGR) message set. The DQI-NP is small (52 cubic inches), lightweight (2.65 pounds), and low power (17 watts). DQI-NP provides an available, low cost, commercial off-the- shelf, nondevelopmental-item (COTS/NDI) solution to a variety of commercial and military applications.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	161 - 166
Cite this article:	Martin, Michael K., Detterich, Bruce C., "Digital Quartz IMU - Navigation Processor (DQI-NP) Design and Performance," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 161-166.
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