Order tracking (OT), which is realized by signal sampling in equal-angle increment
according to the measured rotating speed, is a powerful technique for rotating machine fault …

Abstract Condition Monitoring System (CMS) substantiates potential economic benefits and
enables prognostic maintenance in wind turbine-generator failure prevention. Vibration …

For a rotary machine vibration signal collected under variable speed conditions, its time–
frequency representation (TFR) contains abundant oscillatory components with time-varying …

Rotor-roller bearing-housing systems (RBHSs) are widely utilized in many industrial
machinery, such as aero-engines, high speed trains, wind turbine, etc. A clearly …

In this work, genetic algorithm (GA), kernel based mutual information (KEMI) fitness function
and variational mode decomposition (VMD) based strategy is proposed for the purpose of …

The main purpose of this paper is to represent a methodenabling vibration components to
be extracted from a high-resolution Short-Time Fourier-Transformation (STFT) based …

A ridge in a time-frequency graph (TFG) describes the relationship of a signal component's
instantaneous frequencies over time. Accurate ridge extraction from TFGs is beneficial for …

The rotational frequency (RF) is an important information for multi-fault features detection of
rolling bearing under varying speed conditions. In the traditional methods, such as the …

Bearing weak fault feature extraction under time-varying speed conditions is a challenging
task. The classic time-frequency analysis (TFA) based ridge detection algorithms cannot …

Under normal operating conditions, bearings often run under time-varying rotational speed
conditions. Under such circumstances, the bearing vibrational signal is non-stationary …