自适应循环发动机模式转换过渡态控制规律设计方法研究

Design Method Research of Mode Switch Transient Control Schedule on Adaptive Cycle Engine

关键词:  自适应循环发动机  过渡态  模式转换  控制规律  性能模型

Key words:  Adaptive cycle engine  Transition state  Mode switch  Control schedule  Performance model

摘要:

作为航空动力宽适应性与多变量控制技术交叉融合的构型，自适应循环发动机可工作于不同模式而获得推力或者耗油率的性能受益，也带来典型任务剖面下发动机工作模式转换过渡过程控制规律设计问题。基于自适应循环发动机过渡态性能仿真模型，针对模式转换过渡过程控制规律设计方法问题开展了相关研究，提出了“中间状态”分阶段模式转换控制规律设计方法及“模式转换转速”等可调变量调整策略。结果显示，模式转换前后低压转速上升0.38%，推力下降0.06%，表明该方法可保证典型工况下模式转换过程推力和发动机转速等参数连续变化。

Abstract:

As an evolutional variable cycle engine concept of wide adaptability and multivariable control techniques， the adaptive cycle engine can switch different operating modes in typical working conditions for thrust or specific fuel consumption performance gains. These operating modes lead to the mode switch transient state problems under typical mission profiles. Based on the adaptive cycle engine mode switch transient state performance model， relevant research on the design method of mode switch transient control schedule was carried out. The "intermediate state" mode switch control schedule design method by stages and the adjustable variable adjustment strategy such as "mode switch speed" were proposed. Results show that the low-pressure speed increases by 0.38% and the thrust decreases by 0.06% during mode switch， indicating that the method can guarantee continuous changes in thrust and other parameters including the engine speed during mode switch under typical working conditions.