某型涡喷发动机模型预测控制研究

【作者】 苗浩洁； 王曦；

【机构】 北京航空航天大学能源与动力工程学院； 先进航空发动机协同创新中心；

【摘要】 针对某型双转子涡喷发动机,研究和设计了受限模型预测控制器。先采用发动机期望输出与预测输出之差为性能指标,进行无约束模型预测控制推导;为确保航空发动机工作安全性,给输入和输出以限制约束,设计了在限制条件下的转速调节控制,研究了有约束条件的预测控制;此后通过改变加权因子、进行了将燃油流量作为优化目标的预测控制研究。对无约束、有输入输出约束及有约束且以燃油流量为优化目标这三种情况进行该型发动机的计算仿真,结果表明无约束下系统输出有超调和震荡等现象,有约束的情况下系统输出则明显改善,且选取合理的加权因子能够达到优化燃油消耗量的目标。更多还原

【Abstract】 The constrained model predictive controller for dual-rotor turbojet engine is studied and designed. First, taking the difference between the expected output and predicted output as the performance index, unconstrained model predictive control(MPC) is deduced. By restricting input and output to ensure working safety of aeroengine, the speed regulation controller is designed and the constrained MPC is studied. Then, by changing the weighting factor, constrained MPC that takes fuel flow as the optimization goal is studied. The results of turbojet engine simulation under three conditions of unconstrained, constrained and constrained with fuel flow as the optimization goal show that the system output has overshoots and oscillations under unconstrained conditions, that the output is significantly improved under constrained conditions and that selecting the weighting factor reasonably can achieve the goal of optimizing fuel consumption.更多还原