Aiming to safety and power requirements for unmanned aerial vehicle(UAV) during high altitude long endurance

a simulation model was initially established for a certain aircraft piston turbocharger engine through using the MATLAB/Simulink.The model was constituted by four parts:turbocharger model

mean value engine model

intercooler model and waste gate model.The feasibility of model was verified by empirical data.Then

according to analysis safety margin of turbocharger engine level

the safety requirement for turbocharger engine was proposed

and the impact of key parameters on system safety have been researched.Finally

based on safety margins principles for waste gate was demonstrated

which made the whole turbocharger system of aircraft piston engine performed within the safety margins.The result indicates that the model-based research on turbocharger engine system can obtain safety margin of system

provide reference for further improvement of turbocharger engine system at an acceptable safety level

and ensure the safety requirement during design period.