Actuator Fault Diagnosis and Accommodation for Flight Safety

This paper presents an adaptive fault diagnosis and accommodation scheme for aerodynamic actuators. The fault-tolerant control architecture consists of three main components: an online nonlinear fault detection and isolation scheme, a controller suite, and a reconfiguration supervisor which performs controller reconfiguration and control reallocation using online diagnostic information. The proposed scheme provides a unified architecture for fault detection, isolation and accommodation of actuator failures. Simulation studies using a nonlinear ´Beaver´ aircraft model have shown the effectiveness of the proposed scheme