Method for Selecting Ramjet Sensors Based on Extension Theory

The ramjet has many controllable and measurable parameters.Thus,the selection and optimization of sensors are especially important.According to the established ramjet engine integrated model,the concept of object and associated function in the extension theory was used,which changed the relation of various factors in sensor selection to the associated function matrix.Then the analytic hierarchy process was applied to determine the weight values of different factors.Eventually,a comprehensive evaluation method used in ramjet of sensor selection was proposed.The method is proved to be feasible and well combined with practical project by using it in the sensor selection of subsonic combustion ramjet combustor inlet.