Accession Number ADA560811
Title Position Estimation for Projectiles Using Low-cost Sensors and Flight Dynamics.
Publication Date Apr 2012
Media Count 38p
Personal Author F. E. Fresconi L. D. Fairfax
Abstract Navigation of gun-launched precision munitions using affordable technologies is investigated. Estimation algorithms were developed to blend flight dynamic models with measurements from inertial sensors and, if available, global positioning system (GPS). The launch and flight characteristics of the unique, gun-launched environment were exploited both in the state estimator and for novel heuristic parameter identification. The algorithm included using low- cost inertial sensor arrays and general GPS availability. Experimental results from guided mortar flights indicate that the algorithm with only inertial sensor measurements yields position errors less than 40 m over a 30-s flight. Position errors from the experiments decrease slightly using loose coupling when GPS is available. Simulations were conducted to assess algorithm performance over a wider range of conditions. These results demonstrate that position errors are less than tens of meters for flight times of interest to munitions. Estimation is intolerant to inertial sensor errors due to the novel manner in which known flight dynamics are used to compensate measurements. Overall, this effort shows that navigation error resulting from a low throughput algorithm using affordable inertial sensors is sufficient to increase system accuracy for munitions.
Keywords Accuracy
Aerodynamic characteristics
Algorithms
Arrays
Coupling(Interaction)
Detectors
Dynamics
Environments
Errors
Estimates
Flight
Global positioning system
Guided projectiles
Gun launched
Heuristic methods
Identification
Inertial systems
Kalman filtering
Launching
Low costs
Measuring instruments
Models
Mortar ammunition
Navigation
Parameters
Position finding
Precision
Projectiles
Simulation
Throughput


 
Source Agency Non Paid ADAS
NTIS Subject Category 76D - Navigation Systems
79A - Ammunition, Explosives, & Pyrotechnics
Corporate Author Army Research Lab., Aberdeen Proving Ground, MD. Weapons and Materials Research Directorate.
Document Type Technical report
Title Note Final rept. Sep 2011.
NTIS Issue Number 1222
Contract Number N/A

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