Amplitude Correction Approach Using Average of Several Points in Discrete Spectrum for Analyzing the Dynamic Signal of Rotating Machinery with Varying Speed

Part I and part II of this paper present a new data acquisition technique-Pseudo-syn-chronous Signal Resampling, which pre-processes varying speed signal so that conventional signal processing methods can be applied.

The development trends of pumps were discussed from the aspects such as efficiency,new materials,seal, pumps of varying speed and computer applications.

For a quasi steady-state active balancing system of a speed-varying rotor, according to certain time steps the varying speed of the rotor is discretized into finite constant angular speeds.

Amplitude Correction Approach Using Average of Several Points in Discrete Spectrum for Analyzing the Dynamic Signal of Rotating Machinery with Varying Speed

Part I and part II of this paper present a new data acquisition technique-Pseudo-syn-chronous Signal Resampling, which pre-processes varying speed signal so that conventional signal processing methods can be applied.

The development trends of pumps were discussed from the aspects such as efficiency,new materials,seal, pumps of varying speed and computer applications.

For a quasi steady-state active balancing system of a speed-varying rotor, according to certain time steps the varying speed of the rotor is discretized into finite constant angular speeds.

The dissertation puts forward the pseudo-synchronous signal resample(PSSR)technique, so we can computer order domain analysis to processing vibration signal and abstract the feature related to the speed of varying speed pump.

A model is established indicating motion errors concerning RV-MI Type Robot in the papter which reaches a conclusion that the regulation and law governing the robot′s varying motion error and the tools′ angles varying will increase as the motion errors increase, therein, with their varying speed being gradually lowered.

The hydraulic transmission means that power is transmitted by kinetics of liquid,with the properties of varying speed,soft driving and protecting from overloading.

The average error in yield estimate was 3.4% and 5.2% at constant ground speed and varying speed, respectively.

Varying speed of speaking affected the segmentation of the two syllables by the normal-hearing more than it affected the segmentation by the hearing-impaired.

In this paperwewill derive a generalized uncertainty principle (GUP) in a simple varying speed of light (VSL) model.

Generalized Uncertainty Principle in a Simple Varying Speed of Light Model

The issue of a varying speed of light in mirage cosmology is addressed and we find a scenario in which ceff always increases, tending asymptotically to c0 as the universe expands.

Static strength design of a crane mechanism is usually carried out with consideration of its uniform speed operation, actually the mechanism is working with a varying speed during its start and retardation, so the inner forces of its parts continuously varying with time. This paper gives the calculation models of elements expressed in matrices through the dynamic analysis of rigid dynamic models of crane mechanisms. For different mechanism, motion differential equations can be obtained as a result...

Static strength design of a crane mechanism is usually carried out with consideration of its uniform speed operation, actually the mechanism is working with a varying speed during its start and retardation, so the inner forces of its parts continuously varying with time. This paper gives the calculation models of elements expressed in matrices through the dynamic analysis of rigid dynamic models of crane mechanisms. For different mechanism, motion differential equations can be obtained as a result of accumulating the calculation models of different elements. The solution of the equations gives the instantaneous inner forces and accelerations of the parts.

In this paper,the unstationary random vibration signal is analysed by wavelet decomposition and its frequency spectrums are further obtained by Fourier transformation. According to the characteristics of the frequency spectrams,the fault diagnosis can be made for varying speed machinery. As an example,the fault diagnosis of a varying speed cooling system,which is the main part of a 3 500 t/h large cooling tower of a coldˉrolled steel factory is carried out,and its result shows that the method presented...

In this paper,the unstationary random vibration signal is analysed by wavelet decomposition and its frequency spectrums are further obtained by Fourier transformation. According to the characteristics of the frequency spectrams,the fault diagnosis can be made for varying speed machinery. As an example,the fault diagnosis of a varying speed cooling system,which is the main part of a 3 500 t/h large cooling tower of a coldˉrolled steel factory is carried out,and its result shows that the method presented here is feasible and effective for practical use.

This paper deals with the lubricating system of ammonia compressor VVVF transformed In this paper,a method of replenishing lubricating oil with auxiliary pump,based on analysis of the construction and principle of the lubricating system,is developed for the madequate of oil during the course of varying speed A fuzzy control system of the auxiliary lubricating pump has been designed and put into operation in Daqing Petrochemical Plant since December 1996 and satisfactory results have been obtained The...

This paper deals with the lubricating system of ammonia compressor VVVF transformed In this paper,a method of replenishing lubricating oil with auxiliary pump,based on analysis of the construction and principle of the lubricating system,is developed for the madequate of oil during the course of varying speed A fuzzy control system of the auxiliary lubricating pump has been designed and put into operation in Daqing Petrochemical Plant since December 1996 and satisfactory results have been obtained The principle of electric control system,the fuzzy controller and the coordinate of lubricating system and compressor are given in the paper