Stochastic resonance array for designing noise-boosted filter banks to enhance weak multi-harmonic fault characteristics of machinery

Applied Acoustics, Год журнала: 2025, Номер 236, С. 110710 - 110710

Опубликована: Апрель 8, 2025

Язык: Английский

---

Theoretical analysis and potential engineering application of an energy harvester

International Journal of Mechanical Sciences, Год журнала: 2024, Номер 275, С. 109284 - 109284

Опубликована: Апрель 17, 2024

Язык: Английский

---

Two-stage benefits of internal and external noise to enhance early fault detection of machinery by exciting fractional SR

Chaos Solitons & Fractals, Год журнала: 2024, Номер 182, С. 114749 - 114749

Опубликована: Март 26, 2024

Язык: Английский

---

Bearing fault damage degree identification method based on SSA-VMD and Shannon entropy–exponential entropy decision

Structural Health Monitoring, Год журнала: 2024, Номер 23(5), С. 3105 - 3133

Опубликована: Янв. 18, 2024

Aiming at the problem that weak fault signal of rolling bearing is affected by background noise and itself leads to difficulty in extracting features, a diagnosis method based on sparrow search algorithm-variational mode decomposition (SSA-VMD) Shannon entropy–exponential entropy decision proposed. Firstly, failure energy ratio original acquired judge failure. Secondly, time-domain decomposed VMD optimized SSA-VMD obtain Intrinsic Mode Function (IMF) component, kurtosis correlation coefficient are normalized fused. The fusion parameter ( R V ) used filter IMF filtered component reconstructed achieve reduction effect. subjected Hilbert transform envelope spectrum vibration signal, type can be judged. Finally, input into model entropy-multilayer forward neural network (MFNN) identify degree damage. effectiveness verified using experimental data different types intermediate shaft bearings Shenyang Aerospace University self-built outer ring detachment evolution. results show more conducive judging whether has than signal. screening effectively characteristic frequency its doubling inner rings bearings. values damage signals have distribution regions, which verify identification entropy–MLP judgement.

Язык: Английский

---

A two-stage Duffing equation-based oscillator and stochastic resonance for mechanical fault diagnosis

Chaos Solitons & Fractals, Год журнала: 2024, Номер 182, С. 114755 - 114755

Опубликована: Март 23, 2024

Язык: Английский

---

SEACKgram: a targeted method of optimal demodulation-band selection for compound faults diagnosis of rolling bearing

Structural Health Monitoring, Год журнала: 2024, Номер unknown

Опубликована: Март 12, 2024

Rolling bearing plays an important role in carrying and transmitting power rotating machinery, the fault is easy to lead mechanical accidents, resulting huge losses casualties. Therefore, condition monitoring diagnosis of rolling bearings are very improve safety equipment. Compound a common evolved from initial defect, which characterized by randomness, coupling, concealment, secondary. The existence these characteristics brings great challenges accurate compound faults. In faults, traditional methods that select single optimal demodulation frequency band for analysis identification sometimes cannot completely extract multiple components, prone miss misdiagnosis. order solve this problem, SEACKgram method proposed constructing Square Envelope Unbiased Autocorrelation Correlation Kurtosis (SEACK) index. original signal divided Maximal Overlap Discrete Wavelet Packet Transform, SEACK index used quantitatively describe signals different bands. According periods, resonant bands maximum value selected, then resonance analyzed square envelope spectrum, type identified according characteristic frequency. simulated experimental vibration with faults verify feasibility method. results show can accuracy would be applied engineering practice certain extent.

Язык: Английский

---

Extremely multi-stable grid-scroll memristive chaotic system with omni-directional extended attractors and application of weak signal detection

Chaos Solitons & Fractals, Год журнала: 2024, Номер 190, С. 115791 - 115791

Опубликована: Ноя. 29, 2024

Язык: Английский

---

A Novel High-Dimensional Coupled FHN Neuron Stochastic Resonance Model and its Performance in Faults Recognition

Journal of Vibration Engineering & Technologies, Год журнала: 2025, Номер 13(1)

Опубликована: Янв. 1, 2025

Язык: Английский

---

Coexisting attractors, amplitude control, circuit implementation of grid-scroll memristive hyperchaotic oscillator and its application in underwater signal detection

Mechanical Systems and Signal Processing, Год журнала: 2025, Номер 229, С. 112525 - 112525

Опубликована: Март 3, 2025

Язык: Английский

---

The nonlinear dynamics analysis of stochastic delay Jeffcott rotor-seal system with the elastic support

Communications in Nonlinear Science and Numerical Simulation, Год журнала: 2024, Номер 132, С. 107898 - 107898

Опубликована: Фев. 13, 2024

Язык: Английский

---