CONDITION MONITORING ON VIBRATION RESPONSE OF MISALIGNED ROTORS

The accuracy of modeling of rotor systems composed of rotors, bearings and a foundation is evaluated and discussed in this paper. The experimental data have been obtained with a fully instrumented three ball bearing, two shafts test rig. The fault models are then used in the frame of a model based malfunction identification procedure in the time domain and frequency domain. Rotating machines are extensively used in diverse engineering applications, such as power stations, marine propulsion systems, aircraft engines, machine tools, automobiles and other accessories. The vibration in rotating machinery is mostly caused by unbalance, misalignment, mechanical looseness, shaft and other malfunctions. All these malfunctions can lead to a premature failure of a bearing, the shaft or coupling. Condition monitoring is a valuable tool to extend the operating life of a machine. The various conditions monitoring techniques available vibration monitoring is the most widely used one in industry today. The objective of vibration monitoring is the detection of changes in the vibration condition of the object under investigation during its operation by using lab view. The cause of such changes is mainly the appearance of any of the malfunctions.