飞机纵向控制律闭环模型，可以非常方便的获得最优纵向控制律-Closed loop model aircraft longitudinal control law can be very convenient to obtain the optimal longitudinal control law

simulate in matlab. H inf. Loop Shaping Robust Control vs. Classical PI(D) Control: A case study on the Longitudinal Dynamics of Hezarfen UAV. PI(D) Control System Design.