Aviation Turboshaft Engine Mathematical Modeling And Control Law

According to the low-development of turbo-shaft aero-engine modeling technology of real-time nonlinear mathematical model in China, the component-based model (CBM) of X turbo-shaft aero-engine is studied in this paper. Several important characteristic curves of the aero-engine are gained by analyzing the simulation results of the CBM. Then, based on the gained characteristic curves, a real-time characteristic-curve model (CCM) of the turbo-shaft aero-engine is developed. The simulation results of the CCM show that the CCM using the new modeling technology based on the characteristic curves is simple, real-time and accuracy both on steady state and transient process.To start with, the turbo-shaft aero-engine modeling technology of CBM is introduced. Together with the component characteristic data of X turbo-shaft aero-engine, the CBM of X turbo-shaft aero-engine is set up. This model is validated by the simulation results. Then, by analyzing the data gathered from the test-bed of another turbo-shaft aero-engine, certain characteristic curves are obtained. Based on these curves, the CCM of this turbo-shaft aero-engine is established. The simulation results show the very similarity between the CCM and the test-bed data.To study the adaptability of the CCM modeling technology, the CBM simulation is seemed as the real engine to produce the data in this paper. Then, the characteristic curves are gained by analyzing the simulation data, thus the CCM of the CBM is set up. The simulation shows the high accordance between the CCM and CBM both on steady state and transient process. The compared-simulation also shows the better performance of the CCM on real-time. Another advantage of CCM is that the CCM doesn't base on the explicit characteristic of the component. Furthermore, the CCM is adaptable, expandable and easy used in engine control system.At the end of this paper, the control law of the turbo-shaft engine is studied. Two kinds controllers (one is hydro-mechanical and the other is digital-electronic) are analyzed. The mathematical model of the hydro-mechanical controller is established...