Identification of multiple faults of the aircraft engine digital control system

A new method for multiple faults diagnosis of nonlinear systems based on fuzzy parity equation was presented.

The simultaneous emergence of multiple faults occurs commonly in practice.

An ant-path based research of multi-fault diagnosis;

In this paper, the circumstances were analyzed when multi-fault happened in fault diagnosis, and an effective method was put forward to resolve the problem of multi-fault diagnosis.

Modeling & reasoning technique of multiple failures based on polychromatic sets;

To solve the consistency problem of knowledge representation of the Bayesian diagnostic network,the mapping framework between the failure modes and the physical components are established,and a kind of hierarchical structural model of the multiple failures is proposed combined with the structural decomposition of the complex system.

As a low-probabilistic and high-risk failure, the multiple failures is necessary to take into account under a certain condition, and the occurrence probability and severity of multiple failures are varies with the change of operating mode caused by equipment maintenance.

On the basis of a three tank system, a semi-qualitative approach to diagnosis of multiple faults of a class of hybrid systems is proposed.

The operations of the ash and slag removing systems of the two 600MW subcritical units in Yimin Power Plant project phase Ⅱ were introduced,some frequently occurring faults of the main equipments were described,and the handling measures adopted were expounded.