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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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Применить Всего найдено 2. Отображено 2.
08-08-2023 дата публикации

Blasting vibration signal noise reduction method based on WOA-VMD-MPE

Номер: CN116561520A
Автор: ZHANG ZHIYU, JIA HAOQI, HUANG YONGHUI, WANG KAI, ZENG HUA, LIU HAOSHAN, LI HONGCHAO
Принадлежит:

The invention discloses a blasting vibration signal noise reduction method based on WOA-VMD-MPE. A blasting vibration signal is imported into a data processing platform; performing VMD decomposition on the signal data by taking K and a as whale individual positions, and iteratively calculating the individual position with the minimum power spectrum entropy value as the K and a values of the VMD; the values of K and a are used for the VMD to decompose the signal into a plurality of modal components; calculating each modal component by using MPE to obtain an MPE value; and if the MPE value is smaller than K, reconstructing and combining the modal component to obtain a signal after blasting vibration noise reduction. According to the method, the WOA is adopted to adjust K and a values in the VMD, the most suitable K and a values can be calculated through multiple iterations at a time, the blasting vibration signals are decomposed and reconstructed through the VMD-MPE algorithm to eliminate ...

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Номер записи: 1
25-07-2023 дата публикации

SVMD and MPE-based blasting vibration signal noise reduction method

Номер: CN116484178A
Автор: ZENG QINGTIAN, ZHANG ZHIYU, FENG XINGLONG, HUANG YONGHUI, YANG CHAOYI, LI HONGCHAO, LIU MINGWU, JIA HAOQI, LI ZHENGRONG, WANG JIANGUO, LI XIANGLONG, ZENG HUA
Принадлежит:

The invention discloses a blast vibration signal noise reduction method based on SVMD and MPE. The blast vibration signal noise reduction method comprises the following steps: importing blast vibration signal data into a data processing platform; decomposing the blasting vibration signal data into a plurality of modal functions by adopting an SVMD algorithm; calculating each modal function by adopting an MPE algorithm to obtain an MPE value of each modal function; if the MPE value is not less than a preset value K, determining that the modal function is a noise function; if the MPE value is smaller than K, it is judged that the modal function is useful information, then the modal function of the useful information is reconstructed and combined, and a signal obtained after blasting vibration noise reduction is obtained. The SVMD is adopted to process the vibration signals, the endpoint aliasing effect existing in EMD is solved, the modal functions can be continuously extracted, the number ...

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Номер записи: 2