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Utvärdering av kalibreringsmetoder för modväxlande kammare
Linköping University, Department of Electrical Engineering.
Linköping University, Department of Electrical Engineering.
2002 (Swedish)Independent thesis Basic level (professional degree)Student thesisAlternative title
An Evaluation of Calibration Methods for Reverberation Chambers (English)
Abstract [sv]

Vår uppgift var att praktiskt genomföra och utvärdera två kalibreringsmetoder för modväxlande kammare hos Saab Avionics AB i Linköping. En metod som Saab Avionics använder och en metod enligt europeisk civil flygstandard, EUROCAE ED- 14D kapitel 20.6.

Uppgiften löstes genom att utföra mätningar enligt de två kalibreringsmetoderna och därefter analysera mätdata i MatLab.

Vi hann med att göra Saab Avionics kalibreringsmetod i samtliga mätpunkter som krävdes för utvärderingen, men bara drygt halva kalibreringen enligt europeisk civil flygstandard.

Utifrån de mätningar vi gjort kan vi dra följande slutsatser: Båda kalibreringsmetoderna säger att Saab Avionics modväxlande kammare uppfyller respektive krav när den är olastad.

Båda metoderna säger också att kammaren inte uppfyller kraven när den är lastad.

Däremot visar Saab Avionics kalibreringsmetod inte samma resultat i alla demätpunkter vi jämfört när kammaren var lastad och den kan därför inte anses vara tillförlitlig i sin nuvarande form. Kalibreringsmetoderna kan inte anses likvärdiga som de ser ut idag.

Abstract [en]

Our assignment was to perform and evaluate two calibration methods for reverberation chambers at Saab Avionics AB in Linköping. One method used by Saab Avionics and one according to the standard EUROCAE ED-14D chapter 20.6.

The problem was solved by performing measurements according to the two methods and evaluating the data using MatLab.

We managed to carry out the Saab Avionics calibration method in all of the measuring points required for the evaluation, but only half of the calibration according to EUROCAE ED-14D.

From the measurements that we have performed we can draw the following conclusions: Both of the calibration methods state that the Saab Avionics reverberation chamber fulfils the requirements when it is unloaded.

Both of the methods also state that the chamber does not fulfil the requirements when it is loaded.

However the Saab Avionics calibration method does not give the same result in all of the measuring points that we compared when the chamber was loaded and it can therefore not be considered to be reliable in its present form. The calibration methods cannot be considered to be equal as they are today.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2002. , 85 p.
Series
LiTH-ISY-Ex-ET, 0236
Keyword [en]
Electronics, MVK, modväxlande kammare, resonanskavitet
Keyword [sv]
Elektronik
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-1321OAI: oai:DiVA.org:liu-1321DiVA: diva2:18643
Uppsok
teknik
Available from: 2002-09-13 Created: 2002-09-13

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CiteExportLink to record
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