航空发动机全包线鲁棒变增益LPV控制律设计

Robust Gain Scheduling LPV Control Design for Aeroengine in Full Envelope

提出了一种结合多胞形鲁棒变增益控制综合技术和基于系统广义距离的调度策略的航空发动机全包线控制方法。利用雅克比线性化方法获得包线内多点的发动机线化模型,将这些点作为多胞形模型的顶点,并利用多胞形鲁棒变增益控制综合技术设计顶点控制器。引入能够反映系统广义距离的间隙度量来计算包线内其他点的凸分解系数,结合顶点控制器实现全包线内发动机中间状态高压转速控制。全包线内的仿真结果表明,采用该控制方法能够满足航空发动机中间状态控制要求,具有较好的鲁棒性和跟踪性能,同时保证了控制器在全包线范围的稳定性。

A control method combining robust gain scheduling control with the scheduling strategy based on system generalized distance is proposed for aeroengine control in full flight envelope. The Jacobian linearization technique is used to obtain linear model of aeroengine, and then some linear models are set as vertices of polytope model. Using robust gain scheduling control based polytope model, the controller of these vertices are obtained. The convex decomposition coefficients of other points in the envelope are calculated by gap metric, which is supposed as system generalized distance. With the convex decomposi- tion coefficients and vertex controllers, the LPV controller is built and used for the intermediate state control of compressor. Simulation results show that the controller satisfies the performance demand of aeroengine control in full envelope. The stability and robustness are also verified by the simulation.