Arrangement method and system of self-adaptive blade tip timing sensors

Abstract

The invention discloses a self-adaptive blade tip timing sensor arrangement method and system. The method comprises the following steps: constructing a vibration simulating signal space and dividing the vibration simulating signal space into a parameter design signal space and a parameter test signal space; obtaining theoretical sensor measurement data through calculation, and obtaining a blade vibration equation through fitting; obtaining a correction value of the measurement sensor arrangement scheme; judging whether the difference value of the two continuous correction values meets a preseterror requirement; calculating to obtain a difference NStest between the blade vibration equation corresponding to iteration termination and the parameter test signal space; and judging whether an error between the difference value NStest and the difference value NSfinal meets a preset requirement. The method can be applied to various different blade tip timing parameter identification algorithms, and a sensor arrangement mode meeting a selected algorithm can be obtained.

Description

technical field [0001] The invention belongs to the technical field of blade tip timing measurement, and in particular relates to an arrangement method and system of self-adaptive blade tip timing sensors. Background technique [0002] The blade tip timing measurement method is a non-contact vibration measurement technology. Its basic principle is to install a blade tip timing sensor on the static shell at the top of the blade to measure the time when the blade passes the sensor. Because the blade is affected by the vibration, the arrival of the blade The time will lead or lag, and the amplitude of the blade at this moment can be obtained through the time difference, the blade speed and the radius of rotation, and then processed by different blade tip timing processing algorithms to obtain the blade vibration information. [0003] The processing of blade tip timing algorithm will directly affect the identification effect of blade vibration parameters. Different blade tip ti...

AI Technical Summary

Problems solved by technology

In actual blades, due to installation deviation, environment and other factors, the vibration parameters of the same blade are often not fixed, but constantly changing in an interval. Therefore, if the arrangement of the blade tip timing measurement sensor is only for a certain vibration parameter of the blade To achieve the optimum, it is often difficult to adapt to the changing blade vibration parameters, so that there is a large error between the blade vibration parameters obtained by parameter identification and the actual situation

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