| 摘要 |
The systems and methods for health monitoring of complex systems include receiving a plurality of signals indicative of observation states of a plurality of operating variables of the complex system, performing a combined probability analysis of the plurality of signals using a diagnostic model of the monitored system to provide a health prognosis of the monitored system, and providing an indication of the health prognosis of the monitored system. Preferably the combined probability analysis is carried out using a layered Bayesian network. In some embodiments, the monitored system may be an onboard system of an aircraft, such as an engine bleed pre-cooler of an environmental control system. In this case failure of the pre-cooler is determined based on a change in at least one of an average deviation in fuel flow, an average deviation in exhaust gas temperature and an average deviation in air supply and control system temperature. |
