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以太网发展至今已有30多年的历史,具有结构简单、成本低廉、带宽易于扩展及其兼容性好等诸多优点。但作为传统上面向商业用途的局域网络,以太网由于存在不确定性和实时性能欠佳等问题,仍受到来自自动控制领域的多方质疑。为此本文对这些关键性的技术进行阐述。
Ethernet has been in development for over 30 years and has many advantages such as simple structure, low cost, easy bandwidth expansion and good compatibility. However, as a traditionally used commercial local area network, Ethernet is still subject to multiple questions from the field of automatic control because of its uncertainties and poor real-time performance. To this end, this article describes these key technologies.