Study On Simulation And Evaluation Of Helicopters' Flying Performance And Reliability

Today helicopters are of much importance in military affairs and national economy fields. The simulation of the helicopter's flying performance is first introduced here, and then some descriptions of reliability are discussed, at last some methods used to deal with the reliability data and their applications in the helicopter's maintenance are analyzed. All the works having been involved above are carried out being circled with the maintenance of helicopters.First, the characters of the helicopter's flying performance and the process characters of the turboshaft are discussed. A stabilization and non-real-state math model of the work process of the turboshaft is established. The solution of the model and its implementations are explained briefly.Secondly, a simplifying work of the model above based on the calculate program of the engine's test performance is brought up, and a thermodynamic math model is set up in the end. The characters of the engine and the flying performance of the helicopter are calculated based on the thermodynamic math model. A compare between the simulation data and the standard data presented by the manufacturer is taken to evaluate the helicopter's current performance and predict the developing trend of the performance.Thirdly, a discussion of the reliability data types and their treatments is presented. The applications of these analyzed results in the maintenance of helicopters are given out.Finally, the software of the Simulation and Evaluation System of Flying Performance and Reliability for Helicopters (S&EFPRfH) is introduced shortly, and the result of a helicopter on the S&EFPRfH is presented.