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针对现代航空发动机是一个具有不确定性的强非线性系统,结合滑模变结构控制和模糊逻辑系统的优点,提出了一种模糊滑模变结构模型跟踪控制方法。采用比例积分型切换超平面设计滑模变结构控制系统,使用模糊逻辑系统自适应调节切换增益,得到某涡扇发动机的模糊滑模变结构模型跟踪控制器。数字仿真结果表明,所设计的控制器不但能使被控对象较好地跟踪参考模型,消除抖振现象,而且对系统的不确定性具有不变性,保证了被控系统在整个控制阶段都具有较强的鲁棒性。
Aiming at the problem that modern aeroengine is a strong nonlinear system with uncertainties, a fuzzy sliding mode variable structure model tracking control method is proposed based on the advantages of sliding mode variable structure control and fuzzy logic system. A sliding mode variable structure control system with proportional integral switching superplanar design is used. The fuzzy logic system is used to adaptively adjust the switching gain to obtain a fuzzy sliding mode variable structure model tracking controller for a turbofan engine. The numerical simulation results show that the designed controller can not only make the controlled object track the reference model well and eliminate the chattering phenomenon but also have the invariance to the system uncertainty and ensure that the controlled system has Strong robustness.