NDLI: An application of fuzzy sets in real time filtering problems

Content Provider	IEEE Xplore Digital Library
Author	Lea, R.N.
Copyright Year	1987
Description	Author affiliation: NASA/Johnson Space Center, Houston, Texas (Lea, R.N.)
Abstract	In real time updating of a state vector with error corrupted measurement data several types of problems can be encountered. The sensor data may be unusually noisy or have unexpected biases. In the cases of sensors that acquire and track electromagnetic signals the signal acquired may not even be the correct one. Furthermore, a sensor may be tracking the desired signal, lose it, and lock on to an incorrect signal. All of these problems are entirely feasible in space rendezvous navigation where optical and radar sensors are used. They can cause a filter editor to allow erroneous data to be processed, thus destroying the state vector or cause the correct signal to be edited thus losing valuable information. In space rendezvous operations these problems have been avoided by human monitoring of residuals and handling of questions of whether to process or inhibit data. In this paper the human decision making task is modeled with fuzzy sets and the Kalman filter updates to the state vector are weighted using fuzzy functions. Results of the study show that the use of fuzzy set models gives results comparable to those requiring human assistance, e.g. lock on to false targets, and better results when the problem is caused by noise and/or bias, or unexpected errors in the state vector at initial acquisition.
Starting Page	1929
Ending Page	1933
File Size	360208
Page Count	5
File Format	PDF
DOI	10.1109/CDC.1987.272851
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-12-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fuzzy sets Filtering Humans Radar tracking Spaceborne radar Optical filters Laser radar Optical sensors Electromagnetic measurements Navigation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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