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Method for extracting failure characters of rotary machine based on Kalman order-domain-holo-spectrum theory

A technology of rotating machinery and fault characteristics, which is applied in the field of fault diagnosis of mechanical equipment, can solve problems such as the limitation of application range, and achieve the effect of expanding the application range

Active Publication Date: 2014-04-16
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] However, holographic spectrum technology also has some shortcomings: the main analysis object is the steady-state signal of fixed speed, it is difficult to analyze the speed fluctuation and the non-stationary signal in the process of speed up and down, which greatly limits the scope of application

Method used

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  • Method for extracting failure characters of rotary machine based on Kalman order-domain-holo-spectrum theory
  • Method for extracting failure characters of rotary machine based on Kalman order-domain-holo-spectrum theory
  • Method for extracting failure characters of rotary machine based on Kalman order-domain-holo-spectrum theory

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The present invention first calculates the average rotational speed of each revolution through correction of the key phase signal, and then calculates the rotational speed value corresponding to each sampling point of the vibration signal through linear interpolation in each revolution. Use the calculated rotational speed signal sequence to perform Kalman order analysis on the vibration signals of each vibration channel, and extract the order components of the 1st to 4th order, and the complex envelope of each order component can be used to calculate the value of each component at the corresponding rotational speed Amplitude and phase, and then use the principle of holographic spectrum to draw the order ratio holographic waterfall diagram in the process of starting the car. Through the holographic waterfall diagram, the changes of various charact...

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Abstract

The invention discloses a method for extracting failure characters of a rotary machine based on a Kalman order-domain-holo-spectrum theory. The capacity of processing unstable signals through Kalman order-domain analysis and the capacity of comprehensively and reliably reflecting the state of a unit through holo-spectrum are utilized in a composite mode. Through combination of the Kalman order-domain analysis and the holo-spectrum analysis, two-dimensional holo-spectrum can be used for failure diagnosis in fluctuation of speed, and force and couple decomposition, and holographic waterfall curve analysis of parking signals can be conveniently carried out. By means of the method, the application range of traditional holo-spectrum is greatly widened, various characteristic parameters of the parking signals are extracted, the defect that in the prior art, only bode plot analysis is overcome, the level and range for monitoring and diagnosing failures of the rotary machine are expanded, and powerful supporting is provided for healthy and reliable operation of the rotary machine.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of mechanical equipment, in particular to a method for extracting fault features of rotating machinery based on the Kalman order-holographic spectrum principle. Background technique [0002] Rotating machinery is a type of machinery widely used in modern industry. It is widely used in aviation, electric power, petroleum, chemical and other industries, and most of them are key components of production equipment. Once an accident occurs, it will cause great economic losses. Therefore, condition monitoring and fault diagnosis of rotating machinery are of great significance. At a stable speed, the use of holographic spectrum technology can comprehensively and reliably reflect the amplitude, frequency, and phase information of the unit. In actual production, it can identify hidden dangers in the operation of the unit more accurately than the general method. Holographic spectrum technology realizes accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 温广瑞廖与禾李杨臧廷朋江铖梁正虎张恒辉
Owner XI AN JIAOTONG UNIV
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