Time Synchronization Mechanisms for the Industrial Marketplace

Mazur, David C.; Entzminger, Rob A.; Kay, John; Morell, Pete A.

doi:10.1109/tia.2016.2603464

Cited by 24 publications

(5 citation statements)

References 9 publications

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“…Figure 2 f plots the cumulative distribution function of the switching duration Δ s over 120 independent switching events, defined as the time interval between the switch at one endpoint and the switch at the other. Independent switching requires a median value of Δ s = 230 ms, as the switch may happen at slightly different time instants in the two endpoints, which only rely on NTP for a loose synchronization 39 . The coordinated approach takes <42 ms in the worst case (median 30.11 ms), as the switch is triggered by a centralized controller for both endpoints.…”

Section: Resultsmentioning

confidence: 99%

Dynamic spectrum sharing between active and passive users above 100 GHz

et al. 2022

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Sixth-generation wireless networks will aggregate higher-than-ever mobile traffic into ultra-high capacity backhaul links, which could be deployed on the largely untapped spectrum above 100 GHz. Current regulations however prevent the allocation of large contiguous bands for communications at these frequencies, since several narrow bands are reserved to protect passive sensing services. These include radio astronomy and Earth exploration satellites using sensors that suffer from harmful interference from active transmitters. Here we show that active and passive spectrum sharing above 100 GHz is feasible by introducing and experimentally evaluating a real-time, dual-band backhaul prototype that tracks the presence of passive users (in this case the NASA satellite Aura) and avoids interference by automatically switching bands (123.5–140 GHz and 210–225 GHz). Our system enables wide-band transmissions in the above-100-GHz spectrum, while avoiding harmful interference to satellite systems, paving the way for innovative spectrum policy and technologies in these crucial bands.

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Section: Resultsmentioning

confidence: 99%

Dynamic spectrum sharing between active and passive users above 100 GHz

et al. 2022

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“…However, renewable output tends to be uncertain and intermittent, which puts forward higher requirements for the time synchronization precision of PV-grid connection and regulation [4][5]. Traditional methods leverage wireless communication or optical fibers for time synchronization, both of which possess high costs and low coverage in the distribution network [6][7]. Therefore, it is urgent to investigate a power line communication (PLC) wide coverage-appropriated time synchronization technology to satisfy the rigid requirements for renewable energy services such as PV-grid connection.…”

Section: Introductionmentioning

confidence: 99%

Group consensus protocol-based power line communication wide coverage time synchronization

Shi

Yang

et al. 2023

International Conference on Optoelectronic Information and Functional Materials (OIFM 2023)

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High-precision time synchronization of each node in the distribution network is a critical technology supporting for distributed photovoltaic (PV) services. However, traditional time synchronization method has high costs and low coverage applying in the distribution network, which hinders the implementation of distributed PV services. Aiming at the above problems, we propose a group consensus protocol-based power line communication (PLC) wide coverage time synchronization method. First, the PLC wide coverage clock synchronization architecture is illustrated. Then, a group consensus protocol-based clock synchronization algorithm is proposed to achieve fast convergence and high precision time synchronization. Finally, the effectiveness of the proposed algorithm is verified by simulation.

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“…How to control mechatronic systems in an accurate way is a crucial issue in industry, the problem appearing in traditional conveyer and rolling-mill drives, paper machines, robot arm drives, CNC machines, or MEMS (micro-electromechanical systems), etc. [1][2][3][4][5][6][7][8][9][10]. When designing an advanced drive system, one should take into consideration all factors that can potentially affect the performance of the control, including the mechanical characteristics of the drive, especially the finite stiffness of the shaft.…”

Section: Introductionmentioning

confidence: 99%

“…A factor which may have negative impact on the performances of a mechatronic drive is the variation of the plant parameters. In order to compensate the mentioned factors, a suitable control algorithm has to be introduced [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

A Fuzzy Unscented Kalman Filter in the Adaptive Control System of a Drive System with a Flexible Joint

Szabat

Wróbel

Dróżdż³

et al. 2020

Energies

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This paper presents an application of an Unscented- and a Fuzzy Unscented- Kalman Filter (UKF and FUKF) to the estimation of mechanical state variables and parameters in a drive system with an elastic connection. The cascade control structure incorporating an IP controller supported by two additional feedbacks and suitable adaptation mechanism is investigated in this study. The coefficients of the control structure are retuned on the basis of the value of mechanical parameters estimated by filter. The effectiveness of the proposed approaches (classical and fuzzy) is researched through simulation and experimental tests.

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Time Synchronization Mechanisms for the Industrial Marketplace

Cited by 24 publications

References 9 publications

Dynamic spectrum sharing between active and passive users above 100 GHz

Dynamic spectrum sharing between active and passive users above 100 GHz

Group consensus protocol-based power line communication wide coverage time synchronization

A Fuzzy Unscented Kalman Filter in the Adaptive Control System of a Drive System with a Flexible Joint

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