Wavelet packet decomposition based gas turbine engine combustion signal analysis method

A signal analysis method and wavelet packet decomposition technology, which is applied in the direction of gas turbine devices, mechanical equipment, jet propulsion devices, etc., can solve the problems of combustion signal analysis limitations, achieve frequency band uniform division avoidance, improve signal detection accuracy, and improve detection accuracy Effect

Active Publication Date: 2015-01-21
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD +1
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Problems solved by technology

However, the instability of the combustion signal itself makes its analysis limited by the FFT method.

Method used

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  • Wavelet packet decomposition based gas turbine engine combustion signal analysis method
  • Wavelet packet decomposition based gas turbine engine combustion signal analysis method

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Embodiment Construction

[0022] figure 1 It is an implementation plan of a modular combustion signal analysis method for a gas turbine, including a CPU processor, an input / output module, an FPGA module, a communication module, a sensor, a signal conditioner, a man-machine interface and a control system. After the combustion signal is filtered and amplified by the signal conditioner, it is collected by the FPGA module in real time and adjusted. The collected combustion data is transmitted to the CPU processor through the PCI bus. The CPU processor is a real-time operating system, and a wavelet is built inside it. The packet decomposition algorithm analyzes the combustion signal in frequency bands. In the analysis results, the data is divided into control data and display data. The display data is transmitted to the man-machine interface for monitoring by Ethernet communication, and the control data is transmitted by serial communication. To the control system for comprehensive processing and participat...

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Abstract

The invention discloses a wavelet packet decomposition based gas turbine engine combustion signal analysis method. The wavelet packet decomposition based gas turbine engine combustion signal analysis method comprises the steps of using a sensor to acquire combustion signals in a multi-channel mode, filtering and amplifying the acquired combustion signals, then transmitting the signals to a CPU processor through an FPGA module, establishing a wavelet packet decomposition algorithm in the CPU processor to analyze the combustion signals in a frequency band dividing mode, then respectively transmitting analysis results to a human-computer interface and a control system. The wavelet packet decomposition based gas turbine engine combustion signal analysis method can accurately acquire a combustion pressure pulse signal of a combustion gas turbine and can send a corresponding instruction according to the acquired signal so as to ensure normal, stable and safe operation of a unit.

Description

technical field [0001] The invention relates to the field of data collection and analysis of gas turbines, in particular to a method for analyzing combustion signals of gas turbines based on wavelet packet decomposition. Background technique [0002] With the implementation of energy sustainable development strategy and the enhancement of environmental protection awareness, gas turbine technology has attracted extensive attention from all over the world. Among the key technologies of gas turbines, the development of premixed combustion technology is limited by combustion instability, which is manifested as self-excited oscillation in the combustion chamber, which will directly damage the flame tube and transition section of the combustion chamber of the gas turbine, and then fall off. The debris will enter the turbine section with the airflow, causing secondary damage. The combustion signal (pressure fluctuation) in the combustion chamber of the gas turbine is one of the in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00F02C9/00
Inventor 刘炯闵泽生郑婷
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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