Abstract: |
The flight height control of fixed wing UAV is researched in this paper.The error based first order linear active disturbance rejection control (LADRC) is applied to design the outer loop control law of flight height, in which the height control error is used as the input of linear extended state observer and the total disturbance in the flight height control is estimated and dynamic compensated, to accurately control the UAV flight height.Simulation of the flight height control law with height step command and vertical gust disturbance is carried out.The results show that the error based first order LADRC has more stable response to height step command and better wind disturbance resistance performance than the output based first order LADRC. |