航空发动机旋转失速和喘振的动态面控制

Dynamic surface control for rotating stall and surge of aeroengines

针对航空发动机的旋转失速与喘振问题,设计了一种动态面控制方法。新方法控制算法简单,克服了Backstepping方法算法复杂的缺点,并且保留了传统反馈线性化方法中被抵消的有用非线性项;控制器结构单一,当失速情况存在时,控制器的结构与不考虑失速情况时完全一样,仅需更改的是控制器参数的大小;需要的模型信息较少,仅需知道压气机特性包线和Greitzer稳定参数的上界,而无需对失速振幅信号进行测量;基于Lya-punov稳定性理论和数值仿真结果表明了闭环系统的稳定性。

A dynamic surface controller is proposed for the control of rotating stall and surge of aeroengines.The new control law is simpler than the Backstepping method which suffers from the problem of ＂explosion of terms＂ and the useful nonlinearities which would be cancelled in a feedback linearizing design are retained.With or without measuring rotating stall,the same controller structure could be used and the signal of rotating stall amplitude need not be obtained.The design process based on Lyapunov tools and the simulations show that the boundedness of all signals of closed-loop systems can be guaranteed by using the proposed scheme.