| 优先级置顶算法在FlexRay线控转向系统中的应用研究 |
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| 引用本文： | 石志国,张凤登.优先级置顶算法在FlexRay线控转向系统中的应用研究[J].教育技术导刊,2020,19(3):145-149. |
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| 作者姓名： | 石志国 张凤登 |
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| 作者单位： | 上海理工大学 光电信息与计算机工程学院，上海 200093 |
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| 基金项目： | 上海市自然科学基金项目（15ZR1429300） |
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| 摘 要： | 为解决FlexRay线控转向系统中常见的死锁问题，采用优先级置顶算法进行多任务动态调度。首先，分析FlexRay线控转向系统多任务动态调度过程中的死锁问题|然后深入研究优先级置顶算法防止死锁问题的原理|最后搭建双通道多冗余的FlexRay线控转向系统，进行重要系统参数配置。运行结果表明，未使用优先级置顶算法的FlexRay线控转向系统出现了死锁现象，使用优先级置顶算法进行动态任务调度之后，系统可正常运行，证明了算法有效性。
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| 关 键 词： | 优先级置顶算法 死锁 FlexRay 线控转向 任务调度 |
| 收稿时间： | 2019-12-05 |
Application Research of Priority Ceiling Algorithm in FlexRay Steer-by-wire System |
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| SHI Zhi-guo,ZHANG Feng-deng.Application Research of Priority Ceiling Algorithm in FlexRay Steer-by-wire System[J].Introduction of Educational Technology,2020,19(3):145-149. |
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| Authors: | SHI Zhi-guo ZHANG Feng-deng |
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| Institution: | School of Optical-Electrical and Computer Engineering， University of Shanghai for Science and Technology， Shanghai 200093， China |
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| Abstract: | In order to solve the common deadlock problem in FlexRay Steer-by-wire System， this paper adopts the priority ceiling algorithm for multi-task dynamic scheduling. Firstly， the deadlock problem in the multi-task dynamic scheduling process of FlexRay steer-by-wire system is analyzed. Then， the principle of the priority ceiling algorithm to prevent the deadlock problem is studied in depth. Finally， a dual-channel and multi-redundant FlexRay steer-by-wire system is built， and the important parameters of the system were configured. The running results show that the FlexRay steer-by-wire system without the priority ceiling algorithm has a deadlock phenomenon and the system can run normally after the priority ceiling algorithm is used， which proves the effectiveness of the proposed algorithm. |
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| Keywords: | priority ceiling algorithm deadlock FlexRay steer-by-wire task scheduling |
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