Designing and Modeling for Power Integrity / Swaminathan M.; Chung D.; Grivet-Talocia S.; Bharath K.; Laddha V.; Xie J.Abstract-After providing an overview of the state-of-the-art in power distribution design and modeling, this paper focuses on return path discontinuities (RPDs) for I/O signaling. After briefly describing their importance in the context of simultaneous switching noise, a specific case of RPD based on via discontinuities is discussed in detail in the context of both the frequency-and timedomain waveforms using a test vehicle. The modeling of RPD in practical packages and printed circuit boards is addressed along with substrate coupling due to nonideal reference planes. Finally, a high-impedance power distribution scheme for I/O signaling is presented that can potentially solve a number of RPD-related problems, followed by future challenges.Index Terms-Macro-modeling, passivity, power distribution, power integrity, return path discontinuity, signal integrity.

This study proposes a virtual monitoring method for hydraulic supports based on digital twin theory. This method includes an information model, which monitors the attitudes of the hydraulic supports using an information fusion algorithm. This is combined with a virtual digital model that simulates the actual hydraulic support. Important technological aspects of the monitoring system were achieved at the real-virtual interface, which digitizes and modularizes the management and connection processes of the hydraulic supports over its entire life cycle. Finally, experiments were conducted and the real-time virtual images were synchronized with the actual motion of the support within one second, and the error range between the virtual and actual support postures did not exceed 1%. This study demonstrates the potential of this novel combined approach to make it possible to effectively monitor and make decisions regarding the safe and efficient operation of mechanized mine equipment that employ hydraulic supports.

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