Hilbert-Huang transform
Design of Intelligent Pulse Diagnosis Instrument for Tumor Diagnosis
Traditional Chinese Medicine(TCM) diagnosis acquires pathological information through observing,smelling,asking and touching,which are also called “Four Diagnosis”.As a major part of touching,pulse diagnosis becomes an important method to find out health status of patients.However,mainly according to diagnosing experience,traditional pulse diagnosis is lack of objective standard, inconsistently,computer-based pulse diagnosis device depends on the quantitative principles.This inconsistency hinders [...]
The Simulation Analysis on Damage Identification of a Simply Supported Beam Bridge
As the vigorous development of highway bridge in our country, the magnitude of the traffic flow has raised as well as the load of highway bridge. Many questions turned up, as the lower traffic capacity and the bearing capacity, the damage of the structure member. How to identify the structural behavior of a bridge has [...]
The Research of Diagnosis in Motor Fault Based on HHT Transformation
With the development of modern science and technology, and the improvement of electric degree, asynchronous motors play a more and more important role in modern industrial plants. When it work out of order or off-the line, not only the motor itself is destroyed but also the whole system would be in danger and the enormous [...]
The Research of Diagnosis in Motor Fault Based on HHT Transformation
With the development of modern science and technology, and the improvement of electric degree, asynchronous motors play a more and more important role in modern industrial plants. When it work out of order or off-the line, not only the motor itself is destroyed but also the whole system would be in danger and the enormous [...]
Research the Fault Location of Power Systems with Traveling Wave Based on Hilbert-Huang Transform
The power systems with low current grounding have got a wide range of applications in low voltage distribution network of China. If this kind of systems generates a single-phase grounding fault, the obscuration of fault feature will brought some difficulties to the fault line selection and the fault location. Single-phase grounding fault is a major [...]
Research of HHT in Structure Health Monitoring
In modern society, structural health monitoring system is widely used in aircraft, bridges, offshore platforms and other large and complex structures. The vibration based structural damaged detection technology plays a very important role in structural health monitoring system.In order to develop the vibration based structural damaged detection technology, several problems need to be solved, such [...]
Study on the Method of Bearing Fault Extraction Based on EMD and Wavelet Packet
First, after analyzing the characteristics and limitations of classic signal processing, the paper introduces today’s research focus—-Hilbert-Huang transform(HHT) and Wavelet transform(WT), which are the main method of non-stationary signals processing, and deeply studied the basic theory and algorithms.Second, this paper is focused on combining empirical mode decomposition and wavelet and point out that most of [...]
Analysis of Insulator Leakage Current Based on Hilbert-Huang Transformation
Hilbert-Huang Transform and Hilbert spectrum are introduced in this paper to analysis the insulator leakage current and pollution flashover mechanism. Firstly a method based on characteristics of insulator leakage current is put forward to solve the end swing phenomena exist in Empirical Mode Decomposition (EMD).The validity of the method is validated by experiment. And then [...]
Intelligent Fault Diagnosis of Rotating Machine Based on Hilbert Spectrum and Novelty Detection
In modern production, the structure of machinery and equipment is becoming more and more complex. Once a component is failure, it is easy to trigger chain reaction, resulting in great damage to the equipment. So fault diagnosis technology of mechanical equipment is more and more important. Any dynamic mechanical device will have a certain vibration. [...]
Research on Fault Diagnosis Method of Rolling Bearing Based on Hilbert-Huang Transform
Rolling bearing is widely used in rotary machine and liable to be damaged. A lot of faults of rotary machine are related to rolling bearings. Generally, rolling bearing faults lead to abnormal vibration and noise of machines, even cause the damages of machine and casualties. Therefore, it is very important and significant to research fault [...]