STOVL飞机发动机多变量控制方法

短距起飞/垂直降落（STOVL）飞机发动机已采用多变量控制方法。基于鲁棒稳定性和条件数分析、块相对增益矩阵分析，对STOVL飞机发动机不同工作模式下的三变量控制系统输出选择和控制结构设计进行了研究。对常规工作模式，提出了基于多目标优化的三变量分块解耦控制方法，通过定义最优指标实现动态跟踪和分块间的耦合抑制。对常规工作模式和垂直起降工作模式间的切换，提出基于升力风扇功率前馈的复合控制方法，以消除负载变化对系统性能的影响。仿真结果表明:提出的控制方法能够保证常规工作模式下良好的解耦控制效果，能够实现不同工作模式间的平稳过渡，验证了控制方法的可行性。 

STOVL aircraft engine multi-variable control method

The multi-variable control method was already used in the short take off/vertical landing (STOVL) aircraft engine.The research on outputs selection and control structure design for STOVL aircraft engine's three-variable control system was carried out in different operating modes based on the analysis of robust stability,condition number and block relative gain array.As for normal operating mode,a three-variable block decoupling control method based on multi-ojective optimum was proposed.The dynamic tracking and coupling suppression properties were achieved through index definition.As for the transition control between normal operating mode and vertical landing operating mode,a compound controller with lift fan power feedforward was proposed to suppress the influence of the varying load.The simulation results show that the decoupling control effect can be ensured in normal operating mode,and the smooth transition between different operating modes also can be achieved by proposed methods,presenting the effectiveness of the control methods.