A practical implementation of distributed system control over an asynchronous Ethernet network using time stamped data

Anand, Dhananjay; Fletcher, Jeffrey; Li-Baboud, YaShian; Moyne, James

doi:10.1109/coase.2010.5584532

Cited by 9 publications

(8 citation statements)

References 14 publications

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“…The testbed and the control design are discussed in more detail in [11] and [13]. Comparative results are also presented in [11] showing an order of magnitude improvement in the mean squared error between Φ and Ψ.…”

Section: B Reference Forecastingmentioning

confidence: 94%

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Smart clocks have a hand in the smart grid

Fletcher

Chaluvadi

Anand

et al. 2011

2011 IEEE Power and Energy Society General Meeting

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Clock synchronization is becoming an increasingly important characteristic of modern wide area monitoring and control systems such as the power grid. It provides an opportunity to coordinate control actions and measurement instants across hundreds of miles and numerous network topologies. Devices and networks have advanced to a point where synchronization across a wide area can be achieved within 1 μs of UTC (Coordinated Universal Time). Along with these advances in clock synchronization must come a shift in the way analysis is performed. Modeling techniques must incorporate the effects of a clock synchronized device, and control techniques can leverage the knowledge of "time" to achieve unique results. This paper discusses various ways in which clock synchronization affects analysis and performance of the power grid, and presents a few projects related to the technology. Preliminary work has demonstrated the ability of various commercially available devices to provide reliable 1 μs synchronization of clocks, and large variation across devices in terms of clock performance under transient events.

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Section: B Reference Forecastingmentioning

confidence: 94%

“…As a specific case consider that system Ψ needs to build an estimate of system Φ. It can be shown that standard estimation algorithms fail when used in the presence of network jitter in the scale of 5ms [11]. We therefore adopt a two step process to introduce synchronous estimates for y Φ into Ψ .…”

Section: A State Estimationmentioning

confidence: 99%

Smart clocks have a hand in the smart grid

Fletcher

Chaluvadi

Anand

et al. 2011

2011 IEEE Power and Energy Society General Meeting

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“…In Local Area Networks, the IEEE 1588 Precision Time Protocol (PTP) standard has been studied in the context of sensor and control networks that support real-time applications [6]. Similar work in industrial control applications that communicate wirelessly indicates that the most accurate synchronization can be achieved by timestamping at the lowest level in the stack [3].…”

Section: Related Workmentioning

confidence: 99%

VM clock synchronization measurements

Chauhan

Makaroff

Arkles

2011

30th IEEE International Performance Computing and Communications Conference

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Abstract-A modern twist to clock synchronization is the push towards server virtualization and cloud computing. Distributed applications now often run on geographically-distributed, virtualized servers that are isolated from the underlying hardware. Despite the fact that most applications run well in an abstracted environment without direct hardware access, tight real-time synchronized clocks are still necessary.We performed a set of experiments to quantify the additional clock error when running the NTP daemon inside a Virtual Machine. We found that the delay asymmetry is relatively small when running in a non-virtualized environment, but quite significant in a virtualized environment.

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“…However, NTP accuracy ranges from 5 to 100 ms, which is not precise enough for PAR application [17]. To get more accurate synchronization in the local area network, the IEEE 1588 Precision Time Protocol (PTP) standard [18] can provide sub-microsecond synchronization [19]. To implement PTP, the front-end chassis needs to be capable of packing or unpacking Ethernet packets, and additional dedicated hardware and software are required, which increase both the complexity and cost of the front-end subsystem.…”

Section: Backend Synchronizationmentioning

confidence: 99%

An Implementation of Real-Time Phased Array Radar Fundamental Functions on DSP-Focused, High-Performance Embedded Computing Platform

Zhang

Patel

et al. 2016

Preprint

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This paper investigates the feasibility of a backend design for real-time, multiple-channel processing digital phased array system, particularly for high-performance embedded computing platforms constructed of using general purpose digital signal processors. Frist, we obtained the labscale backend performance benchmark from simulating beamforming, pulse compression, and Doppler filtering based on MicroTCA chassis using Serial RapidIO protocol in backplane communication. Next, a field-scale demonstrator of a multifunctional phased array radar is emulated by using the similar configuration. Interestingly, the performance of a barebone design is compared to that of emerging tools that systematically take advantage of parallelism and multicore capabilities, including Open Computing Language.

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A practical implementation of distributed system control over an asynchronous Ethernet network using time stamped data

Cited by 9 publications

References 14 publications

Smart clocks have a hand in the smart grid

Smart clocks have a hand in the smart grid

VM clock synchronization measurements

An Implementation of Real-Time Phased Array Radar Fundamental Functions on DSP-Focused, High-Performance Embedded Computing Platform

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