Journal bearings used in IC engines are prone to premature failures and are likely to fail earlier than the rated life due to highly impulsive and unstable operating conditions and frequent starts/stops. Vibration signature extraction and wear debris analysis techniques are prevalent in industry for condition monitoring of rotary machinery. However, both techniques involve a great deal of techn...

[Background] Audio sources, including human vocal cords and musical instruments usually are based on a harmonic oscillator that produces vibrations on a series of integer multiples of a base frequency. The base frequency defines the pitch of the sound produced. Due to different characteristics of these sources, even if we have 2 sounds from 2 different sources whose base frequencies are the sam...

Classification of targets using their micro-Doppler signatures has attracted a growing interest in recent years. In addition to their main bulk translation, targets may exhibit additional motions, such as vibrations and rotations, which generate Doppler modulations in the echo that contain unique target features and thus can be used to perform target recognition. Although target classification ...

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...

this research is carried out to design and manufacturing of lathe vibration tool and their tests. firstly, one-dimensional vibration tool is designed and made of the bending vibration mode. one-dimensional vibration tool with half piezoelectric rings is considered to excite the bending mode of tool. structure of vibration tool is designed in abaqus software about 20 khz and then is made with re...

Rotating machine health monitoring is critical for system safety, cost savings, and increased reliability. The need a simple accurate fault diagnosis method has led to the development of various techniques. They incorporate vibration, motor’s current signature, acoustic emission signals analysis in condition monitoring. So, based on using vibration signal analysis, test rig was built bearing id...