SBIR-STTR Award

Universal Two Stage GPS/INS Integration for Test Range Applications
Award last edited on: 5/16/2002

Sponsored Program
SBIR
Awarding Agency
DOD : Navy
Total Award Amount
$819,153
Award Phase
2
Solicitation Topic Code
N94-091
Principal Investigator
James W Chaffee

Company Information

ZC&H Dynamic Systems Inc (AKA: Arrowsmith Technologies Inc~J Chaffee & Associates)

5608 Muster Court
Austin, TX 78713
   (512) 794-2804
   N/A
   N/A
Location: Single
Congr. District: 25
County: Travis

Phase I

Contract Number: N00123-94-C-0291
Start Date: 00/00/00    Completed: 00/00/00
Phase I year
1994
Phase I Amount
$69,314
Microcom Corporation and Chaffee Associates propose to design a Time Space Position Information (TSPI) module that will provide Universal Two Stage GPS/INS Integration for Test and Training Range applications. The design will allow combining of data from virtually any GPS receiver with data from any inertial system in a Kalman filter. This method of integrating GPS and INS data will eliminate the need for custom filter design whenever a different GPS receiver and/or INS is used, saving both non-recurring engineering and software development cost. The resulting position, velocity, acceleration, and time data will provide more accurate real-time data to ground station computers and display systems for use by aircraft participating in exercises on test and training ranges. The Phase I study will concentrate on developing and testing software prototypes of universal integration schemes using point estimators based on various norm constraints designed for robustness to outliers, near sufficiency, minimum variance, noise suppression, and mitigation of the effects of large deviations. We will also investigate the hardware aspects of the design including processor type and speed required, interfaces for the GPS receiver and the INS, as well as the overall packaging concept required for either an external pod or internal package. In addition, Microcom will prepare a design plan and submit a preliminary system design specification which will be the basis for development, test, and qualification of a Universal Two Stage GPS/INS Integrated Time Space Position Information (TSPI) module.

Keywords:
TION UNIVERSAL TEST TRAINING RANGE AIRCRAFT

Phase II

Contract Number: N68936-96-C-0065
Start Date: 12/14/1995    Completed: 12/14/1997
Phase II year
1996
Phase II Amount
$749,839
ZC&H Dynamic Systems, Inc. proposes to implement an innovative nonlinear filer for integrating GPS with an inertial sensor. This system is the base for a plug and play, universal GPS/INS integration that takes advantage of advanced GPS technology to provide accurate estimates of position, velocity and attitude with very low cost inertial sensors. The plug and play concept will allow upgrades to lower cost, advanced technology for GPS and for inertial sensors as they become available without the cost of new development or redevelopment. The finished system will be mounted in an AIM-9 pod and will be ready for instant deployment on training ranges. This method of GPS/INS integration provides much closer than coupling of GPS inputs with the inertial rates and sensed forces than is possible with any of the linearized filters now in use. Moreover, it does so without relying on the unstable feedforward method of aiding receiver tracking loops with the inertial system. This development provides the only available integration that will be able to take advantage of the coming generation of high dynamic GPS receivers (90 Gs) that do not rely on delay-lock loops for signal tracking. It is also the only system available that can take advantge of the coming generation of extremely low-cost, low stability mass produced micromachined inertial sensors.

Keywords:
Gps Ins Nonlinear Filtering Linearization Instability Tight Coupling Plug And Play Point Estimation