航空发动机多模型预测滑模控制

Multi-Model Predictive Sliding Mode Control for Aero-Engine

关键词:  航空发动机  多模型  滑模控制  预测控制  飞行包线

Key words:  Aero-engine  Multi-model  Sliding mode control  Predictive control  Flight envelope

摘要:

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。

Abstract:

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.