短距起飞垂直降落飞行器飞行品质研究

Aircraft flight qualities of short take-off and vertical landing

根据短距起飞垂直降落(STOVL)飞行器的特点,结合AGARD 577飞行品质规范,从操纵效能和模态特性两方面对短距起飞垂直降落飞行器在飞行品质方面提出要求。基于短距起飞垂直降落飞行器六自由度模型仿真,对飞行器在短距起降过渡状态下的操纵效能进行评估。以等效系统拟配思想,采用遗传算法与最小二乘法的混合算法,对带L_1自适应控制器的高阶飞行器模型进行低阶等效拟配。采用该低阶模型,对飞行器在不同飞行阶段下纵向与横航向的模态特性进行评估。结果表明,该飞行器在短距起降阶段具备一级飞行品质。

Based on the characteristics of short take-off and vertical landing(STOVL)aircraft,the flight quality requirements of STOVL aircraft are proposed in light of control efficiency and modal characteristics,combined with the AGARD 577 flight quality specification.The control efficiency of the vehicle in the transition state of STOVL is evaluated based on the STOVL 6-DOF model simulation.Drawing on the concept of equivalent system matching,the hybrid algorithm of the genetic algorithm and least square method is used to carry out low order equivalent matching of high order aircraft model with L1 adaptive controller.Using this low order model,the modal characteristics of the vehicle in longitudinal and lateral directions are evaluated.The evaluation demonstrates the first-class flight quality of the aircraft in STOVL.