航空发动机全程滑态模型跟踪控制研究

Aero Engine Global Variable Structure Model Following Control Sys tem

将全程滑态变结构模型跟踪控制首次应用于航空发动机系统 ,设计出了航空发动机全程滑态模型跟踪控制器。采用二次状态反馈法规划的参考模型不仅满足性能指标要求和完全跟踪的模型匹配条件 ,同时也实现了完全解耦。由于全程滑态变结构控制消除了能达阶段 ,故能克服定常滑态变结构控制系统在此阶段对扰动的敏感性 ,并且其控制律的设计可以改善系统的瞬态性能 ,克服扰动和未知参数摄动的影响。结果表明 :所设计的系统能取得令人满意的控制效果 ,能有效地抑制干扰和参数摄动的影响 。

Global Variable Structure Model Following Control(GVSMFC) Theory, a new variable structure control approach, is introduced to aero engine control systems. This approach can efficiently shorten the time during which system initial states rea ch the sliding model, overcome the sensitivity of Constant Variable Structure Co ntrol(CVSC) to uncertainties during this period, and thus enhance the robustness of the system. Furthermore, The design of its control principle also improves t ransient performance of the system. Based on this theory, an aero engine GVSMFC system is designed and studied. The reference model designed via the state feedb ack method meets the performance targets and theory matching requirements in ad dition to complete uncoupling. It is shown that the control system has good foll owing performance, and possesses strong ability of anti disturbance and anti variation of model parameters.