飞行传感器的故障检测与识别

 飞行传感器是飞行控制和导航系统中的薄弱环节,它们的故障率一般是比较高的。为了提高系统的可靠性,对传感器的故障应能实时地检测和识别,并重构传感器所测量的信号(修正)。为此,在系统中常采用传感器的硬件余度和解析余度。本文介绍了飞行传感器硬件余度和解析余度的原理以及几种实用的余度方案,对解析余度中的统计决策原理和故障检测的鲁棒性问题也作了简单介绍。

FAILURE DETECTION AND IDENTIFICATION FOR AIRCRAFT SENSORS

Aircraft sensors are less reliable components in flight control and navigation systems, In order to improve the system reliability, it is desired to detect and identify the faulty sensor and reconstruct the signal measured by the sensor in real time. Hardware and analytieal redundancy are adopted for this purpose. In this paper, a comprehensive survey is given to the analytical redundancy technology. Numerous schemes of analytical redundancy for aircraft sensors are introduced. The principle of statistical decision making for analytical redundancy and the robustness of failure detection and identification algorithms are discussed briefly.