航空发动机多变量模糊滑模变结构模型跟踪控制

Multiple variable fuzzy sliding mode variable structure model tracking control for aeroengine

关键词:  航空发动机  多变量控制系统+  模糊控制+  滑模变结构控制+  模型

Key words:  Aircraft engine  Multiple variable control system+  Fuzzy control+  Sliding mode variable structure control+  Model

摘要:

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。

Abstract:

A method of fuzzy sliding mode variable structure model tracking control was put forward for aeroengine with uncertainty and strong nonlinearity.The method integrated fuzzy logic system into sliding mode variable structure control.By designing sliding mode variable structure control system with proportion-integral switch hyperplane and adjusting switch gain with fuzzy logic system,the fuzzy sliding mode variable structure model tracking controller for some turbofan engine was obtained.Through digital simulation,the results show that designed controller can not only bring the output of plant to track the output of reference model,and eliminate chattering phenomena,but also overcome system uncertainty,and ensure that plant has strong robustness in the whole control process.