Weidong Jiao

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This paper concerns with exponential convergence for a class of high-order recurrent neural networks with continuously distributed delays in the leakage terms. Without assuming the boundedness on the activation functions, some sufficient conditions are derived to ensure that all solutions of the networks converge exponentially to the zero point by using(More)
During the Hilbert-Huang transformation (HHT), time-series data are firstly decomposed into several components with different time scale (i.e. intrinsic mode function, IMF), using the empirical mode decomposition (EMD). Then, the Hilbert transformation is applied to every IMF. As a result, the HHT spectrum of the data is constructed. In this paper, the(More)
  • Weidong Jiao
  • 2008 7th World Congress on Intelligent Control…
  • 2008
Based on the Hilbert-Huang transform (HHT), a method for time-frequency feature extraction from vibration signals was introduced into fault diagnosis of rotors. Firstly, the empirical mode decomposition (EMD) was implemented on vibration signals measured by sensors. As a result, a set of components with different time scales, i.e. intrinsic mode function(More)
Compound faults diagnosis is an important but difficult task in diagnostics. When several faults arise at the same time, vibration measurements by sensors show themselves as a complex integrated symptom, not as a simple and linear combination of several single faults, which makes it difficult to detect compound faults correctly. We proposed a new ICA-SOM(More)
Considering time delays factors and random factors, the stability and control strategy for a class of stochastic vehicle following systems with delays are studied. By applying vector Lyapunov function method, sufficient conditions for exponential stability of the system are obtained. Based on the random vehicles longitudinal dynamics model, which is(More)
Unbalance, fatigue crack and rotor-stator rub are the three common and important faults in a rotor-bearing system. They are originally interconnected each other, and their vibration behaviors do often show strong nonlinear and transient characteristic, especially when more than one of them coexist in the system. This article is aimed to study the vibration(More)
In order to research characteristics of unbalanced rotor system with external excitations, a dynamic model of rotor was established. This model not only considered the influences of the gyroscopic effect and the gravity, but also includes two kinds of unbalance which named static/dynamic unbalance. Use the hypothesis of small angle, expression of forces and(More)
  • Weidong Jiao
  • 2008 7th World Congress on Intelligent Control…
  • 2008
Blind source separation (BSS) is a general and promising technique for signal processing, which can be used to recover the contributions of different physical sources that only from a finite set of observations recorded by sensor. This method is attractive for many fields of applied sciences and engineering including medicine, telecommunication, audio(More)