The grid method is a technique suitable for the measurement of in‐plane displacement and
strain components on specimens undergoing a small deformation. It relies on a regular …

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

In the past three decades, we have witnessed the explosive development of micro/nano
science and technology, where remarkable research efforts have been made in synthesizing …

Fringe patterns from optical metrology systems need to be demodulated to get the desired
parameters. Two-dimensional windowed Fourier transform is chosen for the determination of …

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 …

For rotating machinery condition monitoring and fault diagnosis under speed variation
conditions, order tracking has been considered as a very powerful non-stationary vibration …

The order tracking method based on time-frequency representation is regarded as an
effective tool for fault detection of bearings with varying rotating speeds. In the traditional …

Vibration analysis has been proved to be an effective and powerful tool for the condition
monitoring and fault diagnosis of rolling bearings. During the past decades, the conventional …

Diagnosis of a civil aircraft engine, which is operating under speed variation conditions, is a
representative problem encountered in aeronautic industry. It is still very challenging to …

A novel technique that uses a fan two-dimensional (2D) continuous wavelet transform (CWT)
to phase demodulate fringe patterns is proposed. The fan 2D CWT algorithm is tested by …