基于VxWork的高度容错技术的应用

容错技术能够提高飞行控制系统的可靠性及安全性。主要介绍飞行控制系统的容错技术,针对嵌入式实时操作系统VxWork的特点,进行系统设计,并以高度测量为对象,探讨了一种三余度高度传感器,给出了余度配置、故障检测、任务设置等关键技术,优化及完善了Kalman故障检测。经过大量的测试及半实物仿真试验,该余度方案设计合理可行,不仅较好地完成了高度传感器的余度管理任务,而且有效提高了故障检测率,保证了控制系统的可靠性与容错能力。

Application of highly fault tolerant technology on VxWork

Fault tolerant technique can improve the reliability and safety of flight control system.This paper introduces the fault tolerant flight control system.According to the characteristics of VxWorks which is embedded real-time operating system,the system is designed on height measurement with triplex height sensors.This paper gives the key technologies of configuration,fault detection,task setting and improves the Kalman fault detection.After a lot of testing and semi physical simulation experiment,the results show that the design of the redundancy scheme is reasonable and feasible,and effectively guarantee the reliability and fault tolerant of the control system.