The Application Study Of Experimental Modeling For A Micro Turbine Engine

It is quite difficult to obtain accurate features of aero-engine components in full envelope, while it is easy to acquire the input and output data by experiments. So it is an efficient modeling method when identification experiments are feasible.The purpose of this paper is to establish the dynamic mathematical model of a micro turbine engine (or MTE) based on the rig test data, which comprises the starting procedure and the above-idle state. For the starting procedure modeling, the behavior imitation method is used to simulate the speed and temperature response when the starting motor, propane and igniter activate. The automatic starting controller which is based on the Matlab/Stateflow is designed to simulate the starting procedure and the simulation results of start-up model and the rig test data are compared. For the above-idle state dynamic mathematical modeling, the step-response method, frequency-response method, statistic correlated analysis method and the neural network recognition method are studied respectively to design the rig tests and to acquire the actual input/output data, and then the appropriate data processing is employed to get the dynamic mathematical model of MTE. Furthermore, the close-loop control of MTE with the above model is also studied.The paper demonstrates the feasibility of imitating the MTE starting behavior and experiment-based above-idle state modeling philosophy, which opens up the initial condition of the MTE controlling system research.