基于油压比控制方法技术研究及仿真验证

Research and Simulation Verification of Control Method Based on Oil Pressure Ratio

燃气轮机加减速过程通常采用核心机升转速率控制,优点是加速时间稳定,测量参数精度高。随着用户对机动性要求变高,基于升转速率的控制模型无法识别燃气轮机状态,给燃气轮机加减速过程带来风险。航空发动机依据各部件间的相互匹配关系,采用油压比进行加减速控制,具备快速加减速的能力。根据燃气轮机相似原理,提出一种基于瞬态过程的各部件之间流量平衡方法,计算燃气轮机加减速供油规律。理论分析及仿真验证表明,基于油压比的控制模式能够识别燃气轮机工作状态,控制模式与升转速率控制方法相比更优。研究成果可为燃气轮机瞬态控制规律设计提供参考。

The acceleration and deceleration process of gas turbine is usually controlled by the run-up rate model of core engine,which has advantages of stable acceleration time and high accuracy of measurement parameter.As the user’s requirements for maneuverability become stricter,there is risk in the acceleration and deceleration process of the gas turbine controlled by the run-up rate model due to its inability to identify the state of the unit.According to the matching relationship between various components in the aero engine,the acceleration and deceleration control based on oil pressure ratio has a higher speed.According to the similarity principle of gas turbine,a method based on the flow balance between components in the transient process is proposed to calculate the fuel supply regulation of gas turbine during acceleration and deceleration.Theoretical analysis and simulation verification show that the control mode based on oil pressure ratio can identify the working state of gas turbine,which is better compared with the method of run-up rate model.The research results can provide reference for the design of transient control regulation of gas turbine.