Abstract:Oil system models of aeroengine whole process were established by applying ANN and based on a large number of flight test data,including the models of oil supply pressure,oil differential pressure,oil supply temperature,oil return temperature in middle bearing cavity,oil return temperature in rear bearing cavity and total oil return temperature.Calculation results of the models are in good agreement with flight test results,which shows the feasibility and effectiveness of the presented modeling method.The calculation results of models were applied to the test condition monitoring of the aeroengine oil system,and the realtime tendency monitoring of oil parameters was realized.In addition,a method to determine the main influence parameters of aeroengine oil parameters was developed by using the presented modeling method.