基于小型无人飞行器的CAN总线余度技术研究

Research on redundancy technology of can bus based on small unmanned aerial vehicle

摘要:

随着航空技术和微电子技术的发展,航电系统朝着综合化、智能化、模块化、标准化和系统化的方向发展,CAN总线由于其低成本、协议开放、实现简单、速率快、挂接节点多的特点得到了广泛应用,而这又对其可靠性提出了新的要求；由于飞行器上的众多设备均作为节点挂在CAN总线上,如果总线出现故障会对飞行器的安全带来灾难性的后果。本文在对CAN总线模型进行分析的基础上提出一种双余度CAN总线模型,并给出了实现方法,经过实践验证,本方法切实可行并显著提高了系统可靠性。

Abstract:

Along with the development of the aviation technology and microelectronic technology, avionics system developed for the integrated, inteligent, modular, standardization and systematization. CAN bus has been widely applied due to its features of low cost, open, simple implementation, fast rate, more hooks node. And the new requirement for its reliability is puts forward. Many devices on the aircraft are attached to the CAN bus as nodes. If the bus goes down, A disaster would be occurred in the aircraft . Based on the analysis of CAN bus model, this paper proposes a double-redundancy CAN bus model, and gives the implementation method. Through practice verification, this method improves the reliability of the system Practically.