航空发动机多模型预测滑模控制

针对航空发动机是一个不确定性的强非线性系统,借鉴多模型方法和预测控制思想,提出了航空发动机多模型预测滑模控制。对航空发动机飞行包线进行划分,建立了航空发动机状态空间多模型;对每个模型分别设计了预测滑模控制器,以滑模轨迹为预测模型,进行滚动优化、反馈校正求取控制量,并根据前几时刻与发动机的匹配程度选择当前时刻的控制器;推导出了其稳定性的条件。仿真结果表明,所设计的控制器控制效果令人满意,能有效抑制参数摄动和干扰的影响。

Multi-Model Predictive Sliding Mode Control for Aero-Engine

A method of multi-model predictive sliding mode control was put forward for aero-engine with uncertainty and strong nonlinearity.The method drew lessons from the ideology of multi-model and predictive control.Firstly,the flight envelope of a certain aero-engine was plotted,and the state space multi-models were established.Secondly,predictive sliding mode controller was separately designed for each model.The algorithm predicted future sliding mode values and made rolling optimization and feed-back correction to get the control value.The current controller was chosen based on the match degree of outputs between the models and the aero-engine.Lastly,the stability condition was deduced.Simulation results show that the devised controller has good effect and restrains the influence of parameters perturbation and interfere.