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Methodology for processing pressure traces used as inputs for combustion analyses in diesel engines
ID
Rašić, Davor
(
Avtor
),
ID
Vihar, Rok
(
Avtor
),
ID
Žvar Baškovič, Urban
(
Avtor
),
ID
Katrašnik, Tomaž
(
Avtor
)
PDF - Predstavitvena datoteka,
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(2,86 MB)
MD5: 34BD2CCF22BA3B2DA4ED9862D462D060
URL - Izvorni URL, za dostop obiščite
http://iopscience.iop.org/article/10.1088/1361-6501/aa5f9e
Galerija slik
Izvleček
This study proposes a novel methodology for designing an optimum equiripple finite impulse response (FIR) filter for processing in-cylinder pressure traces of a diesel internal combustion engine, which serve as inputs for high-precision combustion analyses. The proposed automated workflow is based on an innovative approach of determining the transition band frequencies and optimum filter order. The methodology is based on discrete Fourier transform analysis, which is the first step to estimate the location of the pass-band and stop-band frequencies. The second step uses short-time Fourier transform analysis to refine the estimated aforementioned frequencies. These pass-band and stop-band frequencies are further used to determine the most appropriate FIR filter order. The most widely used existing methods for estimating the FIR filter order are not effective in suppressing the oscillations in the rate-of-heat-release (ROHR) trace, thus hindering the accuracy of combustion analyses. To address this problem, an innovative method for determining the order of an FIR filter is proposed in this study. This method is based on the minimization of the integral of normalized signal-to-noise differences between the stop-band frequency and the Nyquist frequency. Developed filters were validated using spectral analysis and calculation of the ROHR. The validation results showed that the filters designed using the proposed innovative method were superior compared with those using the existing methods for all analyzed cases.
Jezik:
Angleški jezik
Ključne besede:
diesel engines
,
FIR filters
,
harmonics
,
spectral analyses
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Recenzirani rokopis
Leto izida:
2017
Št. strani:
Str. 1-22
Številčenje:
Vol. 28, iss. 5
PID:
20.500.12556/RUL-106226
UDK:
621.43(045)
ISSN pri članku:
0957-0233
DOI:
10.1088/1361-6501/aa5f9e
COBISS.SI-ID:
15304475
Datum objave v RUL:
13.02.2019
Število ogledov:
1434
Število prenosov:
714
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Objavi na:
Gradivo je del revije
Naslov:
Measurement science & technology
Skrajšan naslov:
Meas. sci. technol.
Založnik:
IOP Publishing
ISSN:
0957-0233
COBISS.SI-ID:
6000901
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
dizelski motorji
,
FIR filtri
,
harmoniki
,
spektralna analiza
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0401
Naslov:
Energetsko strojništvo
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