DISTRIBUTED MODEL ADAPTIVE ESTIMATION

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$59,817.00
Award Year:
1990
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
12601
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Integrity Systems Inc
600 Main St - Ste 4, Winchester, MA, 01890
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Neal A Carlson
(617) 721-7200
Business Contact:
() -
Research Institution:
n/a
Abstract
THIS INVESTIGATION WILL DEVELOP MULTIPLE MODEL ADAPTIVE ESTIMATION (MMAE) TECHNIQUES FOR DISTRIBUTED KALMAN FILTERS (DKFS), WITH THE GOAL OF IMPROVING FILTER ROBUSTNESS WHILE MAINTAINING NEAR-OPTIMAL ACCURACY OF MULTI-SENSOR NAVIGATION SYSTEMS. THE MMAE APPROACH PROVIDES FILTER ROBUSTNESS IN SYSTEMS WITH UNCERTAIN MODEL PARAMETERS OR PARAMETER CHANGES, TYPICALLY RELATED TO SOURCES OF PROCESS NOISE OR MEASUREMENT NOISE. HOWEVER, WITH CONVENTIONAL KALMAN FILTERS, THIS APPROACH IS IMPRACTICAL WHEN MORE THAN TWO OR THREE UNCERTAIN PARAMETERS EXIST. THE DKF METHOD PERMITS A LARGE, MULTI-SENSOR FILTER TO BE PARTITIONED INTO A SET OF SMALLER LOCAL FILTERS OPERATINGIN PARALLEDL, PLUS A MASTER FILTER PERIODICALLY COMBINING THE LOCAL FILTER SOLUTIONS. THE DKF METHOD PROVIDES OPTIMAL OR NEAR-OPTIMAL ACCURACY, REDUCE PROCESSING BURDEN, AND IMPROVE FAULT TOLERANCE. THE DKF/MMAE (DMAE) TECHNIQUES DEVELOPED HERE WILL ALLOW A LARGE NUMBER OF UNCERTAIN SENSOR PARAMETERS TO BE ACCOMMODATED, VIA LOCAL ADAPTATION OF MULTIPLE LOCAL MODELS, PLUS GLOBAL ADAPTATION AT THE MASTER LEVEL. THESE NEW TECHNIQUES WILL EMPLOY DKF PARTITIONING TO REDUCE THE TOTAL NUMBER OF MULTIPLE MODELS REQUIRED, TO REDUCE THE SIZE OF EACH MODEL-SPECIFIC FILTER, AND TO IMPROVE THE OVERALL ADAPTATION PROCESS.

* information listed above is at the time of submission.

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