运载火箭多表冗余捷联惯组的故障诊断与决策

Fault Diagnosis and Decision-making for Launch Vehicle SIMU with Meters Redundancy

摘要:

为了提高运载火箭惯导系统的可靠性,介绍了一种多表冗余捷联惯性测量组合的故障诊断和冗余信息重构技术,除了对陀螺仪和加速度计信息进行常零值判别、极大值判别之外,还要采取三取二的冗余诊断的管理策略,将故障定位到具体惯组的某个敏感轴,对故障惯组隔离后进行冗余信息重构,既可实现惯组系统级冗余,又能够搭配使用非整套惯组陀螺仪和加速度计信息,实现惯组故障情况下的导航信息的正常输出,增强了运载火箭对惯组故障的适应能力。

Abstract:

To improve the reliability of launch vehicle inertial navigation system,a kind of failure diagnosis and redundancy information reconstruction technology based on strapdown inertial measurement units with meters redundancy is introduced. The method can judge usual zero value or maximum value information of gyro and accelerometer and also diagnose failure by using redundancy and diagnosis management strategy. The failure can be targeted to the specific sensitive axis of meter. After SIMU with failures insulated,the redundancy information is reconstructed. The method not only achieves system redundancy and also uses information of gyro and accelerometer from different SIMU. It realizes SIMU normal output in condition of failure,and enhances the adaptability of launch vehicle for SIMUs failures.