Estimating the Loading Condition of a Diesel Engine Using Instantaneous Angular Speed Analysis

2013 ◽  
pp. 259-272 ◽  
Author(s):  
T. R. Lin ◽  
A. C. C. Tan ◽  
L. Ma ◽  
J. Mathew
Keyword(s):  
Diesel Engine ◽  
Loading Condition ◽  
Angular Speed ◽  
Instantaneous Angular Speed

scholarly journals Processing of Instantaneous Angular Speed Signal for Detection of a Diesel Engine Failure

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Adam Charchalis ◽  
Mirosław Dereszewski
Keyword(s):  
Diesel Engine ◽  
Measurement Data ◽  
Engine Performance ◽  
Failure Detection ◽  
Angular Speed ◽  
Measured Signal ◽  
Main Task ◽  
Optical Encoder ◽  
Detection Analysis ◽  
Instantaneous Angular Speed

Continuous monitoring of diesel engine performance under its operating is critical for the prediction of malfunction development and subsequently functional failure detection. Analysis of instantaneous angular speed (IAS) of the crankshaft is considered as one of the nonintrusive and effective methods of the detection of combustion quality deterioration. In this paper results of experimental verification of fuel system's malfunction detecting, using optical encoder for IAS recording are presented. The implemented method relies on the comparison of measurement results, recorded under healthy and faulty conditions of the engine. Elaborated dynamic model of angular speed variations enables us to build templates of engine behavior. Recorded during experiment, values of cylinder pressure were taken for the approximation of pressure basic waveform. The main task of data processing is smoothing the raw angular speed signal. The noise is due to sensor mount vibrations, signal emitter machining, engine body vibrations, and crankshaft torsional vibrations. Smoothing of the measurement data was carried out by the implementation of the Savitzky-Golay filter. Measured signal after smoothing was compared with the model of IAS run.

FAULT DETECTION IN A DIESEL ENGINE BY ANALYSING THE INSTANTANEOUS ANGULAR SPEED

2001 ◽  
Vol 15 (3) ◽  
pp. 549-564 ◽  
Author(s):  
JIANGUO YANG ◽  
LIJUN PU ◽  
ZHIHUA WANG ◽  
YICHEN ZHOU ◽  
XINPING YAN
Keyword(s):  
Diesel Engine ◽  
Fault Detection ◽  
Angular Speed ◽  
Instantaneous Angular Speed

scholarly journals Condition monitoring and fault diagnosis of diesel engines using instantaneous angular speed analysis

2014 ◽  
Vol 229 (2) ◽  
pp. 304-315 ◽  
Author(s):  
Tian R Lin ◽  
Andy CC Tan ◽  
Lin Ma ◽  
Joseph Mathew
Keyword(s):  
Fault Diagnosis ◽  
Diesel Engine ◽  
Condition Monitoring ◽  
Loading Condition ◽  
Combustion Process ◽  
Engine Performance ◽  
Angular Speed ◽  
Firing Frequency ◽  
Order Component ◽  
Engine Operation

Continuous monitoring of diesel engine performance is critical for early detection of fault developments in an engine before they materialize into a functional failure. Instantaneous crank angular speed (IAS) analysis is one of a few non-intrusive condition monitoring techniques that can be utilized for such a task. Furthermore, the technique is more suitable for mass industry deployments than other non-intrusive methods such as vibration and acoustic emission techniques due to the low instrumentation cost, smaller data size and robust signal clarity since IAS is not affected by the engine operation noise and noise from the surrounding environment. A combination of IAS and order analysis was employed in this experimental study and the major order component of the IAS spectrum was used for engine loading estimation and fault diagnosis of a four-stroke four-cylinder diesel engine. It was shown that IAS analysis can provide useful information about engine speed variation caused by changing piston momentum and crankshaft acceleration during the engine combustion process. It was also found that the major order component of the IAS spectra directly associated with the engine firing frequency (at twice the mean shaft rotating speed) can be utilized to estimate engine loading condition regardless of whether the engine is operating at healthy condition or with faults. The amplitude of this order component follows a distinctive exponential curve as the loading condition changes. A mathematical relationship was then established in the paper to estimate the engine power output based on the amplitude of this order component of the IAS spectrum. It was further illustrated that IAS technique can be employed for the detection of a simulated exhaust valve fault in this study.

A validated model for the prediction of rotor bar failure in squirrel-cage motors using instantaneous angular speed

2006 ◽  
Vol 20 (7) ◽  
pp. 1572-1589 ◽  
Author(s):  
Ahmed Y. Ben Sasi ◽  
Fengshou Gu ◽  
Yuhua Li ◽  
Andrew D. Ball
Keyword(s):  
Angular Speed ◽  
Squirrel Cage ◽  
Instantaneous Angular Speed

Design of a wire measurement system for dynamic feeding TIG welding using instantaneous angular speed

2018 ◽  
Vol 101 (5-8) ◽  
pp. 1651-1660 ◽  
Author(s):  
Régis Henrique Gonçalves e Silva ◽  
Luiz Eduardo dos Santos Paes ◽  
Gustavo Luis de Sousa ◽  
Cleber Marques ◽  
Alberto Bonamigo Viviani ◽  
...  
Keyword(s):  
Measurement System ◽  
Angular Speed ◽  
Tig Welding ◽  
Instantaneous Angular Speed

Influence of the Instantaneous Angular Speed (IAS) of Marine Diesel Engine on its Indication Results

2015 ◽  
Vol 236 ◽  
pp. 204-211
Author(s):  
Marek Łutowicz ◽  
Dominika Cuper-Przybylska
Keyword(s):  
Time Domain ◽  
Ad Hoc ◽  
Angular Speed ◽  
Time Axis ◽  
Crank Angle ◽  
Instantaneous Angular Speed ◽  
Marine Diesel ◽  
Angle Rotation ◽  
Crankshaft Rotation ◽  
Opening And Closing

The paper presents a method of transforming the time axis to the axis of the crank angle rotation based on the pressure measured in time domain and simplified model of the engine dynamics. Indicating is to register the pressure in synchronism with the engine crank angle rotation. Usually in the ad hoc measurements the crankshaft rotation angle transducer is avoided, and the measurements are performed in time domain. For further analysis time axis is transformed for crank angle axis on the base of linear transform. Pressure waveforms obtained during the research were subject of the described transform. During the research instantaneous angular speed (IAS) of the engine crankshaft has been changed by reducing fuel dosage to selected cylinders. Mean indicated pressure (MIP) was calculated. Values o pressure on the begging and the end of compression, opening and closing angles of valves were also determined.

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