基于双向优化策略的航空发动机多变量加速控制规律优化研究  

Optimization of multivariable acceleration control law of aero-engine based on bidirectional optimization strategy

作　　者：姜威 尹金星[2] 郑前钢 张海波 JIANG Wei;YIN Jinxing;ZHENG Qiangang;ZHANG Haibo(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AVIC Chengdu Aircraft Design Institute,Chengdu 610091,China)

机构地区：[1]南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室,江苏南京210016 [2]航空工业成都飞机设计研究所,四川成都610091

出　　处：《推进技术》2024年第6期258-269,共12页Journal of Propulsion Technology

基　　金：国家科技重大专项(J2019-II-0009-0053,J2019-I-0020-0019,2019-III-0014-0058);先进航空动力创新工作站项目(HKCX2022-01-026-03,HKCX2022-01-026-03,HKCX2020-02-027);南京航空航天大学前瞻布局科研专项(ILA220341A22,LA220371A22)。

摘　　要：针对航空发动机传统加速优化采用并行优化方法,未能有效利用燃油与几何变量的配合作用,提出了一种基于双向优化策略的加速控制规律优化方法。并行单向优化方法中的目标函数集中在发动机当前性能上,燃油的主导作用限制了紧贴约束边界优化过程几何变量的调节范围;而几何变量是通过增加空气流量、提高旋转部件效率等措施改善燃油流量的变化速率来间接提高发动机加速性能。因此,双向优化策略根据控制量在提高加速性作用方式的不同,将多变量并行优化分解为燃油单变量和几何多变量优化,并分别采用不同的目标函数,通过确定的加速燃油控制规律正向优化几何加速调节规律,然后根据几何调节规律反向求解加速燃油控制规律。仿真结果表明:在正向优化过程中,喘振裕度不再紧贴约束限制线,优化后的加速时间从4.44 s缩短至3.32 s,双向优化策略的加速时间优于传统并行方法,且优化出的多变量控制规律更平稳,更便于线性化。In view of the traditional parallel optimization method for aero-engine acceleration optimization,which can not effectively use the cooperation of fuel and geometric variables,an acceleration control law optimization method based on bidirectional optimization strategy is proposed.The objective function of the parallel unidirectional optimization method focuses on the current performance of the engine,and the dominant role of fuel limits the adjustment range of geometric variables in the process of optimization close to the constraint boundary.The geometric variable indirectly improves the acceleration performance of the engine by increasing the air flow rate and improving the efficiency of rotating parts.Therefore,the bidirectional optimization strategy decomposes the multivariable parallel optimization into fuel univariate optimization and geometric multivariable optimization according to the different ways in which the control variable plays a role in improving the acceleration,and uses different objective functions respectively.The geometric acceleration regulation law is optimized by the determined acceleration fuel control law,and then the acceleration fuel control law is solved in reverse according to the geometric regulation law.The simulation results show that in the forward optimization process,the surge margin is no longer close to the constraint limit line,and the acceleration time after optimization is shortened from 4.44 s to 3.32 s.The acceleration time of the bidirectional optimization strategy is shorter than that of the traditional parallel method,and the optimized multivariable control law is more stable and more convenient for linearization.

关 键 词：航空发动机 涡扇发动机 加速优化 双向优化策略 几何调节规律 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]