The Simulation Of The Degradation Of Aero Engine And Health Assessment

Aero engine is the core parts of an aircraft, in order to coping with the safety, reliability, economic issues, American and western countries proposed fault prediction and health management of aero engine. Health state evaluation is one of the key technologies. Aero engine is a kind of complex equipment with high reliability, historical degradation data shortage, degradation experiment input enormous funds is a big difficulty for engine’s health management, so it is important to reduce the cost of researching. Computer simulation has a huge advantage in this aspect, not only can reduce the experiment cost greatly but also can reduce workload and shorten the development cycle. Computer simulation can also reduce the experiment risk, solve the issues in optimization, and reduce the cost in the design process. Therefore, the establishment of aero engine simulation platform is of great significance. Researching on the law of degradation of aero engine’s gas path components and finding the way to establish the model of aero engine would be discussed in this paper. Then access the health status of aero engine’s components and predicted the residual life of aero engine. The main content of this paper is as follows:(1) Researching on the method of the simulation of aero engine’s gas path components with no degradation. Choose the method based on the characteristic curve of each component. Due to lacking of experimental data, unseeing the characteristic curve obtained from experiment of other aero engines and taking advantage of the coupling coefficient to fit the characteristic curve that needed in this paper. Determining the process parameters needed in the model for the simulation of aero engine and studying the principle and mathematical model of the components of aero engine. After complete modeling, to establish the verification module and link the entire model.(2) Establishing the simulation model of aero engine’s gas path components with degraded performance. Studying on the principle of aero engine’s gas path degradation and establishing the degradation model for the aero engine based on the degradation of the components’ characteristic curve. Forwarding the way of simulate the degradation process by using the method of translational coupling coefficient. Realizing simulate the degradation process based on the translational coupling coefficient. Analyzing the influence of the gas path component’s degradation for aero engine.(3) Coinciding the aspects of security, reliability and economy bring by the deterioration process of aero engine, it is important to evaluate the health condition of aero engine. Analyzing the characteristics of aero engine’s degradation process and using the hidden Markov model to evaluate the health condition of aero engine. Due to lacking of historical data of the aero engine’s degradation process, using the data generated by the simulation model to confirm the training process of hidden Markov model. At last, taking advantage of hidden Markov model to evaluate the condition of aero engine based on real historical data.