Change search
ReferencesLink to record
Permanent link

Direct link
On the Influence of Sensor Dynamics in Estimation of Reactor Noise Signals
KTH, School of Electrical Engineering (EES), Automatic Control.
2004 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The qualities of measured signals are always affected by the measurement systems and noise. If these effects can be modelled, the original signals can be restored. Two methods for estimation of signals are studied in this work, the causal Wiener deconvolution filter and the Kalman filter. The methods are first applied to two theoretical test cases and then to a pressure signal, recorded during a reactor process. The measurement system works basically as a lowpass filter, and therefore, the high frequency contents of the measured signal consist mostly of uninteresting noise. Because of this, it will not be possible to restore the true high frequency properties of the signal. However, most of the interesting information is in the low frequency range. One conclusion from this work is that some peaks that may indicate interesting dynamics can appear more distinctly in the power spectrum of the restored signal than in that of the measured signal. The methods recover the signals in the time domain, which is useful e.g. when physical models between different quantities are analysed. Finally, the Wiener filter is more straightforward to use in this application, than the Kalman filter is.

Place, publisher, year, edition, pages
2004. , 81 p.
National Category
Control Engineering
URN: urn:nbn:se:kth:diva-109480OAI: diva2:582542
Subject / course
Automatic Control
Educational program
Master of Science in Engineering
Available from: 2013-01-28 Created: 2013-01-04 Last updated: 2013-01-28Bibliographically approved

Open Access in DiVA

fulltext(568 kB)30 downloads
File information
File name FULLTEXT01.pdfFile size 568 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Automatic Control
Control Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 30 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

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link