运输机超低空重装空投抗侧风三维非线性控制律设计
收稿日期: 2013-10-10
修回日期: 2013-12-04
网络出版日期: 2013-12-14
基金资助
国家自然科学基金（61134004）
Design of Three Dimensional Nonlinear Controller for Transport Aircraft Airdropping Heavy Cargos at Extremely Low-altitude Under Crosswind
Received date: 2013-10-10
Revised date: 2013-12-04
Online published: 2013-12-14
Supported by
National Natural Science Foundation of China (61134004)
辛琪 , 史忠科 . 运输机超低空重装空投抗侧风三维非线性控制律设计[J]. 航空学报, 2014 , 35(7) : 1941 -1956 . DOI: 10.7527/S1000-6893.2013.0485
Large transport aircraft suffer from catastrophes and uncertainties in both longitudinal and lateral directions at the moment of airdropping heavy cargos at extremely low-altitude under a crosswind. A three dimensional nonlinear controller for transport aircraft airdropping cargos is investigated. Taking the crosswind and the ground effect into account, the airdropping dynamics including catastrophes and uncertainties is established. To ensure flight safety, a three dimensional controller is proposed by a fourth-order compound approach. The virtual commands for the position loop are given gradually to cause the errors of the position, the flight path and the attitude to propagate toward the inner loop. Subsequently, the control surface and the throttle setting are designed to eliminate the errors of both the position and air speed loops. The closed loop stability of the control system under weak uncertainties is analyzed. Simulations show that the proposed controller can ensure the flight safety for transport aircraft airdropping heavy cargos at extremely low-altitudes under a crosswind.
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