Name
Title | ||
|---|---|---|
A Servo-Clock Model for Chains of Transparent Clocks Affected by Synchronization Period Jitter |
Abstract | ||
|---|---|---|
Industrial networks for distributed monitoring, control, and automation purposes require high-accuracy clock synchronization in topologies including long chains of cascaded nodes. Unfortunately, accuracy typically degrades as the number of devices and the distance from the synchronization reference node (i.e., the master or grandmaster) grows, because of the accumulation of multiple uncertainty contributions. To mitigate this problem, the so-called transparent clocks are used in some synchronization protocols, such as the precision transparent clock protocol used in PROFINET IO isochronous real time networks and the precision time protocol version 2, standardized as IEEE 1588-2008. In this paper, an optimal servo-clock in the mean square sense is proposed. The controller relies on both a Kalman filter that estimates the clock state difference with respect to the master and a static-state feedback assuring mean square stability even under the effect of significant fluctuations of the synchronization period. Several multiparametric simulation results in a case study based on the features of PROFINET IO devices confirm that excellent performance can be achieved with the proposed approach. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TIM.2013.2286871 | Instrumentation and Measurement, IEEE Transactions |
Keywords | Field | DocType |
Kalman filters,clocks,jitter,synchronisation,IEEE 1588-2008,Kalman filter,PROFINET IO devices,PROFINET IO isochronous real time networks,clock state difference,clock synchronization,distributed monitoring,industrial networks,mean square stability,multiparametric simulation,multiple uncertainty contributions,optimal servo-clock model,precision time protocol,precision transparent clock protocol,static state feedback,synchronization period jitter,synchronization protocols,synchronization reference node,transparent clocks,Industrial control,Kalman filters (KFs),optimal control,synchronization,time measurement,uncertainty | Synchronization,Control theory,Computer science,Precision Time Protocol,Real-time computing,Electronic engineering,Kalman filter,Control engineering,Clock synchronization,Jitter,PROFINET,Self-clocking signal | Journal |
Volume | Issue | ISSN |
63 | 5 | 0018-9456 |
Citations | PageRank | References |
5 | 0.54 | 14 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Daniele Fontanelli | 1 | 342 | 43.68 |
| Macii, D. | 2 | 33 | 2.38 |
| Stefano Rinaldi | 3 | 190 | 31.39 |
| Paolo Ferrari | 4 | 392 | 59.01 |