Channel Characterization and EMC Assessment of a PLC System for Spacecraft DC Differential Power Buses

被引：32

作者：

Grassi, Flavia ^{[1
]}

Pignari, Sergio A. ^{[1
]}

Wolf, Johannes ^{[2
]}

机构：

[1] Politecn Milan, Dept Elect Engn, I-20133 Milan, Italy

[2] European Space Agcy, European Space Res & Technol Ctr ESTEC, Electromagnet & Space Environm Div, NL-2200 AG Noordwijk, Netherlands

来源：

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY | 2011年 / 53卷 / 03期

关键词：

Differential dc power buses; modal analysis; powerline communications; spacecraft onboard communication;

D O I：

10.1109/TEMC.2011.2125967

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper investigates the possibility of using the powerline communications (PLC) technology to transmit data along differential dc power buses employed in spacecraft. To this end, a point-to-point interconnection between the power control and distribution unit (PCDU) and a dc/dc converter is considered. The power bus is composed of a twisted-wire pair (TWP) above ground, and capacitive coupling and inductive decoupling networks are adopted. The analysis focuses on channel characterization and electromagnetic compatibility (EMC) assessment of a PLC link for low-speed interconnections with sensors. A transmission line model is adopted for the powerline (PL) involving measurement-based emission models for the power units connected to the line ends. Modal analysis is used to estimate the channel performance in terms of signal and noise transfer ratios. It is shown that use of a balanced transmission scheme assures higher performance both in terms of channel transfer function and immunity to the PL-conducted noise generated by dc/dc converters. A prototype of the PLC link, involving a specific implementation, is realized to prove feasibility and to analyze the system EMC behavior in terms of radiated emissions, conducted and radiated susceptibility.

引用

页码：664 / 675

页数：12

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