In the acceleration control of turbo-shaft engine

life-extending control was designed by the acceleration schedule optimization by taking into consideration engine performance as well as life usage. Constraints such as aerodynamic stability margins

structural strength

combustion stability and power limitation were considered

sequence quadratic program (SQP) optimization algorithm was adopted to optimize the fuel flow of the acceleration schedule. Given that the major influential factors of engine life are the maximum temperature of the turbine first stage cooled stator and the maximum temperature difference between the airfoil and the endwall

two life-extending control methodologies were studied. The first methodology was used to modify the maximum temperature limitation to reduce the temperature of the first stage stator of turbine. The second methodology was performed by an optimization between turbine inlet temperature and shaft speed

and proper trade-offs were provided between them. Simulation of dynamic load process of a kind of turbo-shaft engine showed that both optimization methodologies can drastically reduce turbine stator temperature with minimum sacrifice in performance

then the optimized acceleration schedule can effectively prolong the life of engine.