液体火箭发动机基于主要目标的减损与延寿控制方法

Research ofdamage mitigating and life extending method for liquid-propellant rocket engines based on main object

首先通过构造目标函数、提取约束条件与问题解的分析,对液体火箭发动机减损与延寿控制技术的优化问题进行了数学描述,然后以某大型液氧/煤油火箭发动机为对象,考虑其涡轮叶片为关键部件,研究了发动机起动过程减损控制律综合分析的主要目标法,并在不同的约束条件下,对实现不同意义下的减损控制进行了仿真计算.结果表明该方法可行且有效,能够有效实现系统性能与关键部件损伤间的权衡并实现预期的减损目标,结果为工程中液体火箭发动机的改进和优化设计提供了重要的参考价值.

The optimization method of damage-mitigating and life-extending control （DMI.EC） 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 DMLEC policy 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.