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Improving flexibility and fault-management in CAN-based 'Shared-Clock' architectures

机译：在基于CAN的“共享时钟”架构中提高灵活性和故障管理

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The Controller Area Network (CAN) protocol is widely employed in distributed control systems in a number of sectors (including automotive, industrial, medical and satellite systems). In many such sectors, predictable behavior is a key consideration: such a characteristic is usually associated with time-triggered (TT) system architectures rather than with event-triggered solutions which are more common in CAN systems. Previous studies have illustrated how TT "Shared-Clock" (S-C) algorithms can be used in conjunction with commercial-off-the-shelf (COTS) microcontrollers for creating reliable distributed control systems at Sow cost. In such studies, it has generally been assumed that S-C designs will be implemented using a bus topology on a CAN network. Such designs met cost requirements but certain flexibility/reliability issues predominantly presented by their bus topology have made their use controversial in safety-critical applications. In this paper, we demonstrate that the use of a Shared-Clock protocol with a novel CAN-based star topology synthesized from COTS components can improve the flexibility and reliability of CAN-based S-C designs without significantly increasing costs.
机译：控制器局域网（CAN）协议广泛应用于许多行业的分布式控制系统（包括汽车，工业，医疗和卫星系统）。在许多此类部门中，可预测的行为是关键考虑因素：这种特性通常与时间触发（TT）系统体系结构相关，而不是与CAN系统中更常见的事件触发解决方案相关。先前的研究已经说明了如何将TT“共享时钟”（S-C）算法与现成的商用（COTS）微控制器结合使用，从而以较低的成本创建可靠的分布式控制系统。在这样的研​​究中，通常假设S-C设计将使用CAN网络上的总线拓扑来实现。这样的设计满足了成本要求，但是主要由其总线拓扑结构引起的某些灵活性/可靠性问题使它们在安全关键型应用中的使用引起争议。在本文中，我们证明了将共享时钟协议与由COTS组件合成的新型基于CAN的星形拓扑配合使用，可以提高基于CAN的S-C设计的灵活性和可靠性，而不会显着增加成本。

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