novtexmechМехатроника, автоматизация, управлениеMekhatronika, Avtomatizatsiya, Upravlenie1684-64272619-1253Commercial Publisher «New Technologies»10.17587/mau.26.268-276novtexmech-1753Research ArticleРОБОТЫ, МЕХАТРОНИКА И РОБОТОТЕХНИЧЕСКИЕ СИСТЕМЫROBOT, MECHATRONICS AND ROBOTIC SYSTEMSОб одной частной задаче идентификации лопаток в процессе контроля состояния проточной части газо турбинного двигателяOn One Special Problem of Blades Identifi cation in Monitoring the Technical State of Gas Turbine Engine Air-Gas ChannelБелопуховВ. Н.BelopukhovV. N.

канд. техн. наук, ст. научн. сотр.

г. Самара

Samara, 443020

bvnsam50@gmail.comБоровикС. Ю.BorovikS. Y.

д-р техн. наук, вед. научн. сотр.

г. Самара

Samara, 443020

borovik@iccs.ruПодлипновП. Е.PodlipnovP. E.

научн. сотр.

г. Самара

Samara, 443020

pepodlypnov@yandex.ruСекисовЮ. Н.SekisovY. N.

д-р техн. наук, гл. научн. сотр.

г. Самара

Samara, 443020

sekisov@iccs.ruСамарский федеральный исследовательский центр РАН, Институт проблем управления сложными системами РАНРоссияSamara Federal Research Scientifi c Center RAS, Institute for the Control of Complex Systems RAS (ICCS RAS)Russian Federation202507052025265268276Copyright © Commercial Publisher «New Technologies», 20252025Commercial Publisher «New Technologies»Commercial Publisher «New Technologies»https://mech.novtex.ru/jour/about/submissions#copyrightNoticehttps://mech.novtex.ru/jour/article/view/1753

Рассматривается задача "адресной" привязки результатов измерений пространственного положения торцов рабочих лопаток компрессора или турбины газотурбинного двигателя (ГТД) к конкретному конструктивному элементу силовой установки (лопатке) в процессе контроля состояния проточной части двигателя в условиях ограниченного применения технических средств диагностики и, в частности, невозможности установки датчиков углового положения вала, обеспечивающих синхронизацию опроса первичных преобразователей с периодом вращения ротора турбомашины. Типовыми примерами задач, требующих идентификации с последующей привязкой результатов измерений к каждой отдельной лопатке на контролируемом колесе ротора, являются диагностика срывных и помпажных явлений в компрессоре ГТД, детектирование попадания посторонних предметов в газовоздушный тракт двигателя, определение усталостного разрушения лопаток и т. п. Предлагаемое в статье решение основано на анализе уникального набора значений радиальных зазоров для полного ансамбля лопаток рабочего колеса ротора и сопоставлении текущего и предварительно снятого на этапе сборки "эталонного" образов контролируемого колеса турбокомпрессора. Рассматриваются два алгоритма определения условных порядковых номеров лопаток, не требующие отдельного канала синхронизации и использующие в качестве критериев для идентификации лопаток минимальное евклидово расстояние и максимальное значение функции взаимной корреляции между элементами образцового и текущего массивов кодов. Приводятся результаты проверки работоспособности обоих алгоритмов на лабораторном стенде с реальным колесом компрессора и показывается, что критерий на основе вычислений взаимокорреляционных функций обладает более высокой помехоустойчивостью, а потому является наиболее предпочтительным для практической реализации в реальных системах измерения. С учетом невысокой вычислительной сложности критерия его реализация возможна на нижнем (микропроцессорном) уровне системы измерения, что позволяет сократить аппаратурную избыточность технических средств систем контроля состояния газовоздушного тракта. 

This article is devoted to the problem of "targeted" fixing of the measurement results of spatial position of the blades’ tips of compressor or turbine of gas turbine engine (GTE) to a specific struct ural element of the power plant (blade) in monitoring the state of engine’s gas-air channel under limitations on use of diagnostic equipment and, in particular, the impossibility of installing the shaft’s angular position sensor, that ensures the synchronization of primary converters polling with the rotation period of the turbomachine rotor. The diagnosis of disruptive and surging phenomena in GTE compressor, detection of foreign objects entering the gas-air path of the engine, determination of fatigue failure of the blades are the typical examples of the tasks that require binding of the measurement results to each individual blade on a rotor wheel. The proposed solution is based on the analysis of a unique set of radial clearance values for the complete ensemble of rotor blades with the comparison of the current and previously obtained "reference" images of the turbo compressor’s bladed wheel. Two algorithms for blades’ number determining are considered. The algorithms do not require a separate channel for synchronization and use the minimum Euclidean distance and the maximum value of the cross-correlation function between the elements of the "reference" and current arrays of codes as criteria for blades’ identifying. The results of the performance test of both algorithms on a laboratory bench with a real compressor wheel are presented. It is shown that the criterion based on cross-correlation function calculation has higher noise immunity, and therefore it is the most preferable for practical implementation in actual practice measurement systems. Low computational complexity of the criterion allows to use it at the microprocessor level and to reduce the measuring system hardware. 

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The authors declare that there are no conflicts of interest present.