机载网络化测试系统专用IEEE1588千兆交换机设计

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中图分类号：TB9 文献标志码：A文章编号：1674-5124（2025）07-0120-09

Abstract： To address the technical challenges in airborne networked test systems—such as interoperability barriers between IEEE1588-2002 （v1） and IEEE1588-2008 （v2） devices， implementation diffculties of v1 protocol in gigabit environments， poor vl synchronization accuracy in cascaded networks，and inefficient data filtering-a specialized gigabit switch design based onan FPGA + CPU heterogeneous architecture is proposed. Key innovations include： 1） A protocol conversion middleware to bridge v1-v2 heterogeneous networking; 2） A colaborative framework integrating low-jiter gigabit physical-layer （PHY） chips and FPGA logic to achieve precise vl timing synchronization； 3）A cascaded synchronization method leveraging transparent clock correction mechanism to mitigate multi-level synchronization errors; 4）A high-speed data filtering engine based on atermary content addressable memory （TCAM） architecture， enabling parallel matching of 512 filtering rules.Laboratory tests demonstrate that under harsh conditions （-40-70∘C） ，the switch achieves cascaded v1/v2 synchronization errors below 2O0 ns and stable data filtering latency within 8O ns.Flight tests validateitscapabilityto fulfill critical airborne requirements，including sub-microsecond clock synchronization，compatibility with hybrid protocol devices，and high-performance data filtering，thereby 收稿日期：2025-02-19；收到修改稿日期：2025-03-21 作者简介：李峰（1981-），男，陕西咸阳市人，高级工程师，硕士，研究方向为飞机机载测试技术。（剩余11277字）