基于多目标优化的液体火箭发动机减损与延寿控制  

The Damage-mitigating and Life-extending Control for Liquid-propellant Rocket Engine Based on Multiobjective Optimization

作　　者：魏鹏飞[1] 吴建军[1] 刘洪刚[1] 陈启智[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2005年第6期9-13,共5页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(50276068)

摘　　要：着重分析了减损与延寿控制律的综合过程,提出其基于多目标优化方法的理论基础。在建立某型液体火箭发动机系统动力学模型、关键部件之涡轮叶片的结构分析模型及其材料损伤模型的基础上,分析了应用非线性规划法求解减损与延寿控制律的过程。对发动机起动过程实施减损与延寿控制,结果表明在系统性能略微损失的情况下,可以较大幅度地减小涡轮叶片的损伤,从而达到延长发动机工作寿命的目的。The damage-mitigating and life-extending control （DMLEC） based on multiobjective optimization （MOO） is presented by DMLEC policy analysis and synthesis. The progress of solving DMLEC policy by using nonlinear programming is analysed which combines with the dynamics modelling, the structural analysis of turbine blade and the damage modelling of a certain liquid-propellant rocket engine. Then, the start-up process of the LRE under the control of DMLEC is simulated. The result indicates that the damage of blade is mitigated and the service life of LRE is extended considerably while the system performance is only debased a little.

关 键 词：液体推进剂火箭发动机 减损与延寿控制 多目标优化 非线性规划 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]