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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3. Отображено 3.
28-04-2023 дата публикации

Early fault diagnosis method for rolling bearing based on time-shifting multi-scale incremental entropy

Номер: CN116026592A
Автор: WU FENGJIAO, CHEN FEI, WANG KUN, WANG BIN, IM SUNG-MIN, SEO CHEOL-HEE, LIU TING, CHEN JIANLIN
Принадлежит:

The invention discloses a rolling bearing early fault diagnosis method based on time-shifting multi-scale incremental entropy, and relates to the technical field of mechanical fault diagnosis. Comprising the steps of collecting vibration signals of a fault object and a normal object; calculating a time-shifting multi-scale increment entropy of the vibration signal to obtain a high-dimensional feature data set of the vibration signal; performing dimension reduction processing on the high-dimensional feature data set to obtain low-dimensional feature information; and constructing a random configuration network SCN, and inputting the low-dimensional feature information into the random configuration network SCN for fault identification. The method has the advantages that the stability of fault signal recognition under different load conditions is improved through TSMICE, meanwhile, t-SNE is adopted for dimensionality reduction to effectively distinguish different fault features, and finally ...

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Номер записи: 1
25-08-2023 дата публикации

Anti-seismic waterproof flexible structure for shield tunnel segment joint

Номер: CN116641735A
Автор: BAI HONGGUO, WANG LINUAN, MENG QINGYU, WANG XU, HUO FEI, HUO YONGPENG, ZHAO DUO, WU QIANG, ZHANG CHI, ZHANG MINQING, JIA DAPENG, IM SUNG-MIN, MIAO ZHUANG, ZHAO CHENSHENG, WANG PING, LIANG WENYU, CAI LIBIN, MA LIYAO, LI BOKANG
Принадлежит:

The invention provides an anti-seismic waterproof flexible structure for a shield tunnel segment joint, which comprises a rubber contact pad and an inter-ring flexible joint which are arranged on the side walls, facing a circular seam, of two adjacent rings of shield segments, the inter-ring flexible joint comprises a rubber composite steel bolt connecting piece and a shape memory alloy bolt connecting piece which are arranged at the circular seam of two adjacent shield segments at intervals, and the rubber composite steel bolt connecting piece comprises a rubber composite steel bolt and a steel bolt sleeve matched with the rubber composite steel bolt. The rubber composite steel bolt comprises a high-performance bolt and a rubber layer wrapping the periphery of the high-performance bolt, and the shape memory alloy bolt connecting piece comprises a shape memory alloy bolt and a bolt sleeve matched with the shape memory alloy bolt. By arranging the full-ring rubber contact pad at the circular ...

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Номер записи: 2
18-07-2023 дата публикации

Early fault detection method and system for hydroelectric generating set, and storable medium

Номер: CN116451024A
Автор: WU FENGJIAO, IM SUNG-MIN, PU SHUREN, WANG BIN, JIANG XI
Принадлежит:

The invention discloses a hydroelectric generating set early fault detection method and system and a storable medium, and belongs to the technical field of mechanical fault diagnosis methods. The method comprises the following steps: collecting vibration data of the water turbine, and taking the vibration data as source data; performing blind source decomposition on the source data based on a binary decomposition method to obtain a plurality of source signals; performing alternative data processing based on fast Fourier transform on the plurality of decomposed source signals to obtain alternative data; and performing nonlinear structure damage judgment and fault propagation path drawing based on the alternative data. According to the invention, early fault discovery and maintenance are facilitated, so that the maintenance cost of the hydroelectric generating set is reduced.

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Номер записи: 3