A method and system for arranging adaptive blade tip timing sensors
A blade tip timing and sensor technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as difficulty in adapting to blade vibration parameters, blade vibration parameter errors, etc.
Active Publication Date: 2021-11-19
XI AN JIAOTONG UNIV
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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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[0060] In order to make the purpose, technical effects and technical solutions of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments It is a part of the embodiment of the present invention. Based on the disclosed embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall all fall within the protection scope of the present invention.
[0061] see figure 1 with figure 2 , a method for arranging adaptive blade tip timing sensors according to an embodiment of the present invention, specifically includes the following steps:
[0062] Step 1, in order to better simulate the vibration fluctuation of the real blade, a signal space with multiple vibration equation...
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The invention discloses a method and system for arranging adaptive blade tip timing sensors. The method includes: constructing a signal space for simulating vibration and dividing it into a parameter design signal space and a parameter test signal space; calculating and obtaining theoretical sensor measurement data, Fitting to obtain the blade vibration equation; obtain the correction value of the measurement sensor arrangement scheme; judge whether the difference between two consecutive correction values meets the preset error requirements; calculate and obtain the difference between the blade vibration equation corresponding to the iteration termination and the parameter test signal space Value NS test ; Judgment difference NS test and difference NS final Whether the error meets the preset requirements. The present invention is applicable to various identification algorithms of blade tip timing parameters, and can obtain a sensor arrangement mode satisfying the selected algorithm.
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...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 张荻朱光亚郭鼎谢永慧
Owner XI AN JIAOTONG UNIV