This paper presents a fault diagnostic system which enables the identification of engine malfunctions using the vibration data of crank systems with experimentation on one sample engine. In this system, the equations governing system characteristics are determined by a Time-domain Modal Analysis (TMA) technique. The frequencies, damping factors and mode shapres are used in a hormonic synthesis process to result in zero end torques and stresses in each crank shaft span. Two physical simulation cases were illustrated. In the first testing case, the abnormal excursion of the bearing support system was detected. The replacement of appropriate bearings is suggested. In the second testing case, the combined stresses of the fillet of the crankpin and journal units were found exceeded the allowable fatigue limit. The modification of both elements was suggested.
All Science Journal Classification (ASJC) codes
- Computer Science(all)