Design And Research On The Digital Control System For Micro Turbine Engine

Micro turbine engine is widely used in field of civil Model aircraft,and is receiving more and moreattention in military projects,it gradually becomes preferred power device of small tactical missile、uavsand low cost attack ammunition.Control system is the key to ensure the performance of wholepropulsion system,and emphasize outstanding feature of digitization、highly integration and lowcost.This paper mainly concerns schematic design、simulation investigation and engineering realizationof the digital control system for micro turbine engine.Firstly,application background、function and framework of the system were illuminated.In view ofits core component uints,developed the software and hardware design work,including ARM kernelembedded digital electronic control unit、embedded software based onμCOSⅡreal-time operatingsystem and BLDC motor fuel pump;Aimed at thecharacteristics of the micro turbine engine,selected the system controlparameters,also,designed adjustment plan and control strategy of open-loop and closed-loop;Completed identification of the engine nonlinear model appling equilibrium flow algorithm,at thesame time, based on analytical characteristics and data fitting technology，mathematic models of othersubsystems in the closed-loop were established.In this paper,classic PID control project was discussed torealize system’s closed-loop control.The dynamic process of whole digital control system was simulatedon computer,and PID controller was optimized.Based on the above work,completed the engineering implementation of a micro turbine engineitem,and designed upper compuer system.The system test results proved this digital control systemcould realize the function of sparking、start、cruising、protection and stop etc for micro turbine engine,and could satisfy the dynamic and static requirements.It’s characteristics of digital、miniaturization andlow cost have the practical value.