基于协方差配置的飞机阵风减缓与乘坐品质控制

为了解决大型飞机高速巡航飞行中阵风减缓和乘坐品质控制问题,提出一种基于协方差配置的主动控制设计方法,该方法运用协方差配置、区域极点配置理论,以瞬时加速度级别出现概率直接度量乘坐品质,将期望乘坐品质下飞机的垂直阵风减缓控制问题转化为飞机纵向短周期运动区域极点和法向过载约束的满意控制问题,利用线性矩阵不等式技术进行约束指标下的凸优化,设计相应的相容控制策略。仿真结果表明:大型飞机在给定3m/s阵风条件下巡航,其俯仰速率与过载响应均逐渐稳定,并满足期望极点与输出方差要求,同时,阵风产生的结构疲劳过载超出概率0.08,也在允许范围内,验证了该设计方法的可行性。

Gust alleviation and ride quality control based on covariance assignment for the aircraft

Gusts can adversely affect large transporters during high-speed cruises.An active control technology(ACT)approach was developed based on covariance assignment to control the airplane during gusts.Covariance assignment and the regional pole allocation principle can be used to transform the vertical gust alleviation problem with desired ride quality into a satisfactory control problem with desired regional poles of the aircraft's short-period motion and normal acceleration of the transporter's wing.The satisfactory control problem for these multiple indices can then be further transformed into a convex optimization problem using linear matrix inequality(LMI)technology to design a controller.Simulations of gust alleviation during transporter cruises show that the aircraft's short-period motion meets the desired poles and variance assignment requirements,and probability of structural fatigue due to normal acceleration of the wing is within desired envelop.