Abstract:

A method of identifying the gradual deterioration in the components of aero-engines is presented. Firstly, a sensitivity analysis of the target performance parameters is calculated. The performance parameters are selected due to the largest deviation of measurement parameters. The performance deterioration model of aero-engines based on the clone selection algorithm is proposed. The main feature of the method is that it gives the possibility to identify performance deviations, and the number of measured parameters is smaller than that of performance parameters. This is achieved by the immune clone selection algorithm optimizing a cost function with various constraints. The deterioration process of components performance is derived so that the true assessment of engine components health performance is received. The test results show that the method is feasible and can be used to constitute the criterion of performance deterioration for engine health monitoring.