The optimization method of damage-mitigating and life-extending control(DMLEC) for liquid-propellant rocket engines was presented mathematically in this paper by constructing the object function

acquiring the constraints and analyzing the solutions.Then

the main object method of DMLECpolicy analysis and synthesis was developed for a certain LOX/kerosene rocket engine with turbine blade selected as the critical component.Simulated results under diverse situations show that

the method proposed is feasible and effective

since it can not only achieve the expected goal of damage-mitigating by implementing the tradeoff between the system performance and the damage of critical components

but also provide valuable reference for improving and optimizing the design of engines being developed.