Nonlinear Filter Modeling Diffusion in Target Heading/Speed

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 18168
Amount: $49,965.00
Phase: Phase I
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
2 Eaton St., Suite 500, Hampton, VA, 23669
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Douglas S. Hulbert, Phd
 (804) 727-7700
Business Contact
Phone: () -
Research Institution
To improve automated target tracking and correlation for strategic defense, this proposal models the dynamic behavior of manuevering vehicles by allowing target heading and speed, or their derivatives, to undergo independent diffusion processes. Current methods for surveillance sensors model diffusion in geographically fixed coordinate systems and fail to exploit course/speed nonlinearities, and known dynamic constraints, over time. A stochastic PDE characterizes the transition density of the process, and is supplanted by a sequence of discrete stochastic difference problems. The discrete problems are solved numerically, and an optimal, nonlinear, point-mass filter combines transition density updates with nongaussian observation updates. Operations count, throughput analysis, and comparison with a related filter indicate the filter's feasibility. Applications include multisensor data fusion, runway incursion prevention, tracking in nonradar sectors, and ship collision avoidance.

* Information listed above is at the time of submission. *

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