摘要
研究了某个子系统发生传感器故障时,信息分配对无故障子系统的鲁棒性影响问题。基于提高无故障子系统的抗故障污染能力考虑,从使故障影响极小化出发提出了一种鲁棒信息分配思想。对于仅由双子滤波器组成的联邦滤波结构,给出了一种基于故障检测函数的自适应信息分配方法。从概率的角度,根据这种方法可使其他无故障子滤波器具有较强的抗干扰能力。对于具有主滤波器的联邦滤波结构,给出了一种给定故障衰减系数条件下的鲁棒信息分配系数设计方法。理论分析表明,该方法可使其他无故障子滤波器对故障具有很强的抗干扰能力,从而有利于提高联邦滤波器的快速重构能力。仿真说明本文思想是可行的。
This paper surveys how the information sharing factors influence the robustness of the healthy local filter to the sensor failure in the federated filter （FF） with two local filters. By minimizing the failure＇s influence on the healthy local filter, a robust information sharing idea is theoretically developed to improve the robustness of the local filters to the failure. An information division law based on the fault detection function of the residual Chi square test is proposed for the FF only comprising double local filters. From the viewpoint of probability, this law can make the healthy local filter achieve high resistance to the contamination from the faulty local filter. Based on the assumption that each sensor is probably more healthy than another sensor, a general method to evaluated the irrformation sharing factors under a given fault attenuation coefficient constraint is proposed for the FF with a master filter and two local filters. Theoretical analysis shows by this method each local filter is robust to the sensor failure, which is highly advantageous for the reconstruction of the federated filter after fault isolation. Finally, simulation demonstrates this idea is effective.
出处
《传感技术学报》
EI
CAS
CSCD
北大核心
2006年第2期491-496,共6页
Chinese Journal of Sensors and Actuators
基金
空军工程大学博士论文创新基金
关键词
鲁棒性
信息分配
重构能力
传感器故障
残差χ^2检验法
robustness
information sharing
re-configurability
sensor failure
residual chi-square test
