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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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 4. Отображено 4.
23-06-2023 дата публикации

Sowing and fertilizer spreading all-in-one machine for mustard cultivation

Номер: CN116267102A
Автор: YANG LIANYONG, SUN XINCHENG, HUANG LIN, ZHANG ZHONGWU, JIANG WAN, KANG JIE, CHEN WEIPING, PENG YUANQUN, TAN YUTING, GUO ZHIJUN, LI QI, LU FANGHUA, LAN ZHIYONG
Принадлежит:

The invention relates to the technical field of mustard cultivation, in particular to a mustard cultivation sowing and fertilizer spreading all-in-one machine which comprises a shell mechanism, the shell mechanism is provided with a shell, the mustard cultivation sowing and fertilizer spreading all-in-one machine further comprises a material spreading mechanism, the material spreading mechanism is further provided with two hoppers and a material spreading roller, the two hoppers are both arranged on the top of the shell, and the material spreading roller is arranged on the top of the shell; the inner wall of the bottom of the hopper is obliquely arranged, one side of the hopper is connected with a discharging pipe in a penetrating mode, and the discharging pipe is connected with the bottommost portion of the hopper in a penetrating mode. Mustard seeds and fertilizer are placed in the two independent hoppers respectively, and the supply quantity of the mustard seeds and the fertilizer is ...

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Номер записи: 1
22-08-2023 дата публикации

Freight train speed tracking and anti-slip control based on unscented Kalman observer

Номер: CN116620364A
Автор: YI LINGZHI, YI YU, XIE CHENG, ZHANG DAKE, LAN YONGHONG, LAN ZHIYONG
Принадлежит:

The invention provides a freight train speed tracking and anti-skid control method based on an unscented Kalman observer. On the basis of a multi-mass-point model, the stress condition and the dynamic transfer process of the freight train in the running process are deeply analyzed, and a freight train dynamic model is established. Train running indexes such as energy consumption, punctuality and tracking precision during running of the freight train are fully considered, and optimal tracking of the target running speed is achieved by means of model prediction control. In order to enhance the adaptivity of the control system, a parameter adaptive adjustment mechanism is integrated in the MPC, and adaptive adjustment is performed on the optimization weight representing each driving index in combination with the driving condition of the freight train, so that adaptive model prediction control is formed. The parameter adaptive adjustment is realized through the Elman neural network, and the ...

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Номер записи: 2
25-07-2023 дата публикации

High-precision contact network state sensing method based on data driving

Номер: CN116485226A
Автор: YI LINGZHI, DONG TENGFEI, WANG YAHUI, YU GUO, LIU JIANGYONG, LAN ZHIYONG
Принадлежит:

The invention relates to a high-precision contact network state sensing method based on data driving, and aims to solve the problems that the traditional contact network state sensing mostly adopts a single weighting method or a proportion of subjective and objective weights is artificially given when a combined weight is calculated, so that the calculated contact network index weight is not high in accuracy and is a static constant weight sensing model. When grey clustering is adopted to perceive the state of a contact network, the proportion of directly and fixedly dividing each health state in a membership function has great limitation. The ratio of the subjective weight to the objective weight is optimized by adopting a best-first search algorithm to obtain a constant weight of the index, and the constant weight is dynamically modified in real time based on a variable weight theory to obtain a variable weight more conforming to the actual situation. After each health level is divided ...

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Номер записи: 3
23-05-2023 дата публикации

PMSM position-sensorless control method based on single-phase phase-locked loop phase-shift-free synchronous rotary filter

Номер: CN116155158A
Автор: LAN ZHIYONG, DAI SHANQI
Принадлежит:

The invention provides a permanent magnet synchronous motor sensorless control method based on a single-phase phase-locked loop phase-shift-free synchronous rotation filter, and the method comprises the steps: saving a preceding-stage filter from an output value of a sliding-mode observer, and obtaining an observation counter electromotive force which comprises a fundamental component and a harmonic component; therefore, a low-pass filter and dq transformation are combined in the filter, higher harmonics are filtered out, and meanwhile, a motor observation value has the advantage of no phase shift. According to the principle of Park transformation, the frequency components of the sliding mode output quantities Zalpha and Zbeta and the rotating shaft system are consistent in direction and the same in speed, so that a direct current quantity low-pass filter in a dq-axis coordinate system is obtained, higher harmonics are filtered out, and then the direct current quantity is fed back to the ...

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Номер записи: 4