Simulation Of Modal Interval And Fault Detection In Quid Rocket Engine

In these days, the method is a widely used technique for the fault detection.However,It has a main disadvantage that, without faults, the simulated result is always not consistent with the real one, resulting from the uncertain parameter. By using the modal interval analysis method for modeling, it deals with the problem above.The simulation envelopes of the dynamic system by using the Classical interval analysis method always diverge. The paper has solved this problem by using modal interval analysis method. Particularly, through the application in detecting and isolating faults in a physical system constituted by Block diagram of heat exchanger, the validity of this method is confirmed.The paper deals with simulation of the dynamic system in the liquid rocket engine by The Runge-Kutta Method, improve the velocity and astringency of the computation.Finally, based on real Simulation, it makes Mathematical Model into Modal interval Model for Liquid rocket engine. The Runge-Kutta Method and The Newton Method, it carries out modal interval analysis and obtains its Envelope with no fault; and it uses the Envelope to carry out Fault detection. this paper extends this approach to detect and isolate fault in the liquid rocket engine. The results demonstrate that its effectiveness to complex dynamic systems. In sum, based on modal interval analysis, this study presents a very important way for designing liquid rocket engines and achieving the fault diagnosis data.