失速告警系统应用异构双核处理器的安全性分析研究  

Research on Safety Analysis of Stall Warning System Using Heterogeneous Dual Core Processor

作　　者：宣晓刚[1] 魏璐达 贾少龙 杨飞[1] 张美仙[1] XUAN Xiaogang;WEI Luda;JIA Shaolong;YANG Fei;ZHANG Meixian(AVIC Taiyuan Aero-instruments Co.,Ltd.,Taiyuan 030006,China)

机构地区：[1]太原航空仪表有限公司,太原030006

出　　处：《计算机测量与控制》2023年第6期137-142,共6页Computer Measurement &Control

基　　金：山西省关键核心技术和共性技术研发攻关专项项目(2020XXX019)。

摘　　要：飞机失速会影响飞机的飞行安全,失速告警计算机作为失速告警系统的核心控制部件,在失速发生前通过灯光告警、语音告警、振杆器抖动等方式为飞行员提供告警,提醒驾驶员进行操作,避免飞机进入失速状态;按照SAE ARP4754A中研制保证等级的分类,将失速告警计算机某些功能确定为灾难级,确定其研制保证等级定级为A类;采用异构双核处理器进行失速告警计算机的设计,由于ARP4761中的分析方法对相似性设计有着复杂性和难以模拟仿真的问题,故文章设计参照了IEC 61508参考标准,对采用异构双核处理器的失速告警计算机的安全性能进行了梳理和分析;分析研究结果表明,相比于采用传统的单核处理器或同构双核处理器设计的失速告警计算机,选择异构双核处理器进行失速告警计算机的设计有其独有的优势,其优势在于异构双核处理器所具备的“1oo2D”结构,通过计算分析满足失速告警计算机对于高安全性、高可靠性的要求;依照IEC 61508相关标准,结合失速告警计算机的高性能要求,选择正确的分析设计路径,可以确保失速告警计算机的功能安全完整性等级有效达成,为其他航空产品的设计开发提供参考。Aircraft stall will affect the flight safety of aircraft,as the core control component of a stall warning system,a stall warning computer provides a warning to pilot by means of light alerts,aural alerts and stick shaker before stall occurs,and it reminds pilots to operate and avoid stall.According to the classification of development assurance level in SAE ARP4754A,the functions of the stall warning computer are determined as catastrophic level,and its development assurance level is determined as Class A.A heterogeneous dual-core processor is used to design the stall warning computer.Due to the complexity and difficult simulation of similarity design in ARP4761,this design also refers to the IEC61508 reference standard,the safety performance of stall warning computer using the heterogeneous dual-core processor is combed and analyzed.The analysis results show that,compared with traditional single-core processor or homogeneous dual-core processor,the stall warning computer with heterogeneous dual-core processor has its unique advantages.The advantage lies in the“1oo2 D”structure of the heterogeneous dual-core processor,which can meet the requirements of high safety and high reliability for the stall warning computer for through calculation and analysis.In accordance with relevant IEC 61508 standard,and combined with the high performance requirements of the stall warning computer,the correct analysis and design path can ensure that the functional safety integrity level of the stall warning computer can be effectively achieved,which provides a reference for the design and development of other aviation products.

关 键 词：飞机失速 失速告警系统 失速告警计算机 异构双核处理器 IEC 61508 ARP 4761 安全性分析 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]