Gearbox plays a vital role in a wide range of mechanical power transmission systems in
many industrial applications, including wind turbines, vehicles, mining and material handling …

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

Planetary gearbox fault detection is important in terms of life-threatening failure prevention
and maintenance optimization. This article focuses on the representation of the planetary …

In bearing fault diagnosis, multichannel data can contain more abundant and complete fault
information to alleviate the influence of accidental factors in a single channel. To fully …

Fatigue pitting and abrasive wear are the most common wear mechanisms in lubricated
gears, and they have different effects on the gear transmission system. To develop effective …

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 …

Instantaneous angular frequency (IAF) is an inherent characteristic associated with
mechanical dynamics and contains adequate diagnostic information about rotating …

A non-parametric complementary ensemble empirical mode decomposition (NPCEEMD) is
proposed for identifying bearing defects using weak features. NPCEEMD is non-parametric …

Rotating machinery often operates under varying speed conditions. Fault detection is
necessary to prevent sudden failures and enable condition-based maintenance. Existing …

In industry (eg, wind power), gearboxes often operate under random speed variations. A
condition monitoring system is expected to detect faults and assess their severity using …