Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Engine noise simulator: creating software for controlling the simulator including a graphical user interface, calibration of the ENS and transfer function measurements
2010 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The purpose of the thesis was to create a graphical user interface (GUI) which can control specific hardware for an engine noise simulator (ENS). The ENS should also be calibrated, and the software should be able to utilise these measurements to control the output sound power level. An ENS is an useful tool to investigate sound transfer paths and to simulate different engines quickly without the need to replace the engine in the cabin. The Scania ENS built at Luleå University of Technology, Luleå, uses 29 loudspeakers with a surface microphone in each individual loudspeaker cavity for calibration purposes. There are loudspeakers on each side of the engine. Software with a Graphical User Interface (GUI) has been written using Matlab’s GUIDE, to create a functional application that is easy to set up and use. The GUI has many options so the user can specify how every loudspeaker should perform. The user can create sound groups, and assign any number of loudspeaker to the group, using individual phase and level settings. The types of sounds can be sinusoidal, noise (both white (Gaussian) and pink), sine sweep (or chirp) and also imported .WAV-files. The GUI also handles all calibration functions, and has functions to verify the condition of the ENS. Programming of the software was done using Matlab, and includes functions to control each loudspeaker individually, create as many different sounds as it’s needed and acquire feedback data from each loudspeaker. The ENS was calibrated by measuring transfer functions between sound power level and volume velocity (source strength) of each loudspeaker element. The volume velocity is calculated from measured pressure inside the loudspeaker cavities. By utilising feedback from the surface microphones located inside each loudspeaker cavity, the user can specify a required sound power level for the output. The calibration was made with the LMS suite.

Place, publisher, year, edition, pages
2010.
Keyword [en]
Technology, Engine Noise Simulator, ENS, Software Development, Calibration, Measurements
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-58313ISRN: LTU-EX--10/150--SELocal ID: ee54c437-4ca5-4082-8ef0-a127ed46b48aOAI: oai:DiVA.org:ltu-58313DiVA: diva2:1031701
Subject / course
Student thesis, at least 30 credits
Educational program
Arenaprogrammes (2002-2014)
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(5949 kB)19 downloads
File information
File name FULLTEXT01.pdfFile size 5949 kBChecksum SHA-512
a5372999b2b6625ff813d0bb42e4c9a1a993ab1bd2bcf5ce1a3ba867cd0a6d14f6107953ccdf8571e5f93699961e1d4ab5982f561909a1cb19935e5dbb8c4017
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
Total: 19 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 7 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf