Browse Publications Technical Papers 2011-01-1660

Engine Fault Detection Using Vibration Signal Reconstruction in the Crank-Angle Domain 2011-01-1660

Advanced engine test methods incorporate several different sensing and signal processing techniques for identifying and locating manufacturing or assembly defects of an engine. A successful engine test method therefore, requires advanced signal processing techniques. This paper introduces a novel signal processing technique to successfully detect a faulty internal combustion engine in a quantitative manner. Accelerometers are mounted on the cylinder head and lug surfaces while vibration signals are recorded during engine operation. Using the engine's cam angular position, the vibration signals are transformed from the time domain to the crank-angle domain. At the heart of the transformation lies interpolation. In this paper, linear, cubic spline and sinc interpolation methods are demonstrated for reconstructing vibration signals in the crank-angle domain. Finally, the ensemble-averaged mean squared-error criterion is introduced as the fault-detection metric to determine whether the engine under test is faulty or not. The proposed method is cost effective, non-intrusive and non-destructive. Moreover, the results have shown the crank-angle domain analysis using sinc interpolation for signal reconstruction to be more precise than that using linear or cubic spline interpolation. This improved precision enables better fault detection with a more accurate measure of the severity of the fault condition.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Simulation and Analysis of an ORC-Desalination Combined System Driven by the Waste Heat of Charge Air at Variable Operation Conditions


View Details


Online Monitoring the Condition of Loaded Water Hydraulic Actuators


View Details


A Worldwide Overview of Automotive Engine Control Sensor Technology


View Details