🚗💡 𝑨𝒔 𝒑𝒂𝒓𝒕 𝒐𝒇 𝒎𝒚 𝒐𝒏𝒈𝒐𝒊𝒏𝒈 𝑬𝒎𝒃𝒆𝒅𝒅𝒆𝒅 𝑺𝒚𝒔𝒕𝒆𝒎𝒔 𝑴.𝑺𝒄 𝒔𝒕𝒖𝒅𝒊𝒆𝒔 𝒂𝒕 𝑻𝑼 𝑪𝒉𝒆𝒎𝒏𝒊𝒕𝒛 𝒊 𝒉𝒂𝒗𝒆 𝒋𝒖𝒔𝒕 𝒅𝒆𝒍𝒗𝒆𝒅 𝒊𝒏𝒕𝒐 𝒂 𝒇𝒂𝒔𝒄𝒊𝒏𝒂𝒕𝒊𝒏𝒈 𝒂𝒔𝒑𝒆𝒄𝒕 𝒐𝒇 𝑨𝒅𝒗𝒂𝒏𝒄𝒆𝒅 𝑷𝒍𝒂𝒕𝒇𝒐𝒓𝒎𝒔 𝒇𝒐𝒓 𝑨𝒖𝒕𝒐𝒎𝒐𝒕𝒊𝒗𝒆 𝑺𝒚𝒔𝒕𝒆𝒎𝒔, 𝒇𝒐𝒄𝒖𝒔𝒊𝒏𝒈 𝒐𝒏 𝒕𝒉𝒆 𝒊𝒏𝒕𝒓𝒊𝒄𝒂𝒄𝒊𝒆𝒔 𝒐𝒇 𝒕𝒉𝒆 𝑪𝒐𝒏𝒕𝒓𝒐𝒍𝒍𝒆𝒓 𝑨𝒓𝒆𝒂 𝑵𝒆𝒕𝒘𝒐𝒓𝒌 (𝑪𝑨𝑵) 𝒃𝒖𝒔. 🌐📚
📚 𝐊𝐞𝐲 𝐭𝐚𝐤𝐞𝐚𝐰𝐚𝐲𝐬:
1️⃣ Controller Area Network (CAN): A serial communication bus by Bosch with high and low-speed variants in automotive applications.
2️⃣ Real-time communication: Achieved through prioritization of messages and flexibility in configuration for easy addition of new nodes.
3️⃣ Bit Coding: Non-Return-to-Zero (NRZ) coding, dominant and recessive voltage levels, and the use of "bit stuffing" strategy for most fields.
4️⃣ Bitwise Arbitration: Nodes contend for bus access based on priority, vital for applications like ESP and braking systems.
5️⃣ Principles for Analysis: Bus utilization should not exceed 100%. Worst-case scenario occurs when all messages transmit simultaneously. Longest busy period analysis to ensure no missed deadlines. Higher priority messages delay transmission if the bus is in use.
💻 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐚𝐥 𝐌𝐨𝐝𝐞𝐥:
Model transmission patterns of messages.
Define priorities, separation times, and deadlines.
Consider CAN bandwidth and overhead for feasibility.
📈 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬 𝐏𝐫𝐢𝐧𝐜𝐢𝐩𝐥𝐞𝐬:
1️⃣ Bus utilization should not exceed 100%.
2️⃣ Worst-case scenario occurs when all messages transmit simultaneously.
3️⃣ Longest busy period analysis to ensure no missed deadlines.
4️⃣ Higher priority messages delay transmission if the bus is in use.
🔍 𝐄𝐱𝐚𝐦𝐩𝐥𝐞 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬:
Computed bus utilization and longest busy period.
Employed Worst-Case Response Time (WCRT) analysis to check deadlines.
Prioritization crucial; adjustments may be needed for feasibility.
🌐 𝐂𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧:
CAN enables real-time communication in automotive systems, and careful analysis ensures message delivery within specified deadlines. Explore further analysis techniques in "Controller Area Network (CAN) Schedulability Analysis: Refuted, Revisited and Revised" by R. Davis et al.
#EmbeddedSystems #AutomotiveTechnology #CANAnalysis #RealTimeCommunication #AdvancedPlatforms #TUChemnitz #ProfessionalDevelopment 🛠️📊
Senior Product Mechanical Designer
2wWish I was less then 25 years old, no chance now.