Bi He

RF-LSTM-Based Motion State Prediction for Unmanned Surface Vehicles Under Variable Operating Conditions

Pengpeng Wan, Liming Wang, Yexin Song, Bi He et autres

As a core piece of equipment for marine monitoring, search and rescue missions, and other applications, the motion state prediction accuracy of Unmanned Surface Vehicles (USVs) directly determines mission reliability and safety. However, existing methods fail to fully consider the motion characteristic …

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Research on Seamless Switching Technology and Strategy of Microgrid in Master-Slave Control Mode

Ling Fang, Bi He, Huichao Zuo, Haokai Zhao et autres

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Research on Current Limiting Protection of AC Solid State Power Controller

Huichao Zuo, Bi He, Ling Fang, Jiaming Zheng et autres

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A hybrid forecasting method for geomagnetic field temporal variation by using wavelet packet decomposition and deep neural networks

Libo Zhu, Hui Li, Bo Zhu, Weiwei Li et autres

Abstract Accurate and reliable prediction of geomagnetic data is essential for its management and application. To improve the accuracy of geomagnetic data prediction and overcome the limitations of traditional machine learning algorithms in network structure and prediction time, a hybrid prediction model …

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Construction of a Marine Diesel Engine Fault Sample Database and Deep Learning–Based Diagnostic Framework

Yonghui Zhao, C S Li, Liyong Ma, Peng Yuan et autres

Marine diesel engines often operate under long-term high-load conditions, where hidden and weakly expressed faults are difficult to identify due to the scarcity of labeled fault data and the lack of high-quality samples for intelligent diagnostic models. To address this problem, this …

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Robust motion control of four-vector-thruster AUV “Aurora” under disturbances: optimized ESO-FAISMC control with thrust allocation optimization

Yipin Tong, Bing Huang, Yang Wang, Liming Wang et autres

Against challenges from internal model inaccuracies and external environmental disturbances affecting vector Autonomous Underwater Vehicles (AUVs) tracking, this paper focuses on the team-developed 4-vector AUV Aurora, establishing its kinematic/dynamic models. It proposes an optimized thrust allocation strategy and a control framework combining …

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Research on Commutation Control Strategy of DC Microgrid Bidirectional Converter

Bi He, Junting Bai, Yunpeng Wang, Peng Wan

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The research of space vector modulation in matrix converter with perspective of three-level

Wei Cai, Bi He, Sun Junzhong, LI Dan-ni

Traditional space vector modulation of the matrix converter is an evolution of the two-level inverter, whose vectors are represented by the input phase abc. This paper presents a new modulation strategy with perspective of three-level, which divides the input voltage into 6 …

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Improved two-steps voltage-commutation strategy under non-1 input power factor in matrix converter

Wei Cai, Bi He, Xiaofeng Zhang, Mingzhong Qiao

Matrix converter is a new power electronic topology with many advantages, such as high power density and adjustable input power factor. But in its industrial application, short-circuit is prone to happen due to the faulty commutation method. Even the phenomenon is worse …

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Synchronous machine real-time simulation model based on Hypersim

Chao Zhang, Guo-shun Xu, Bi He

Through the linear prediction of rotational potential, it derived the real-time simulation model of synchronous machine based on Hypersim using UCM. The compare between the waveforms obtained in Hypersim by this model and waveforms acquired in EMTP by the EMTP equipped model …

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Influence of commutation delay and tube voltage drop on waveform distortion and its compensation in matrix converter

Wei Cai, Xiaofeng Zhang, Mingzhong Qiao, Bi He

The output waveform distorts seriously at low modulation ratio, and there are not a paper analyze it overall yet. This paper gives a research on the problem from some facts, the narrow pulse, the commutation delay and tube voltage drop. The time …

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Novel Control Method for Matrix Converter to Reduce Switching Loss

Wei Cai, Xiaofeng Zhang, Mingzhong Qiao, Bi He

The high differential voltage in commutation under transitional space vector modulation strategy is the cause which results in large switching loss of matrix converter. This paper presents a novel method which rearranges the switching sequence according to the magnitude of input voltages, …

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