近年来,航空业发展迅猛,国内各家航空公司都在不断引进新飞机,退役老飞机,保持机龄年轻化,同时不断扩大机队规模.据数据统计截至2016年3月31日中国大陆地区各航空公司在役飞机总数为2814架,中国大陆地区各航空公司在役飞机和订购总数为4...近年来,航空业发展迅猛,国内各家航空公司都在不断引进新飞机,退役老飞机,保持机龄年轻化,同时不断扩大机队规模.据数据统计截至2016年3月31日中国大陆地区各航空公司在役飞机总数为2814架,中国大陆地区各航空公司在役飞机和订购总数为4146架.预计未来20年中国民航需要6000架以上的飞机,价值近万亿美元.伴随着新机型的引进、新航线的开拓,对航空器维修的要求也是日益提高,航空器运营的时效性直接影响到航空公司的收益和品牌.随着B777、B787、A350、A380等新型长航程飞机的引入,飞机因故停场在国外的概率日益提升,本文以某航空公司B777飞机发动机故障需外站AOG(Aircraft On Ground)换发为例,系统性讲述航空公司机务维修各个部门之间如何履行职责、相互配合,最终高效完成任务,保证飞机持续适航参入机队运营.展开更多
This article proposes an integral-based event-triggered attack-resilient control method for the aircraft-on-ground(AoG) synergistic turning system with uncertain tire cornering stiffness under stochastic deception att...This article proposes an integral-based event-triggered attack-resilient control method for the aircraft-on-ground(AoG) synergistic turning system with uncertain tire cornering stiffness under stochastic deception attacks. First, a novel AoG synergistic turning model is established with synergistic reverse steering of the front and main wheels to decrease the steering angle of the AoG fuselage, thus reducing the steady-state error when it follows a path with some large curvature. Considering that the tire cornering stiffness of the front and main wheels vary during steering, a dynamical observer is designed to adaptively identify them and estimate the system state at the same time.Then, an integral-based event-triggered mechanism(I-ETM) is synthesized to reduce the transmission frequency at the observerto-controller end, where stochastic deception attacks may occur at any time with a stochastic probability. Moreover, an attackresilient controller is designed to guarantee that the closed-loop system is robust L2-stable under stochastic attacks and external disturbances. A co-design method is provided to get feasible solutions for the observer, controller, and I-ETM simultaneously. An optimization program is further presented to make a tradeoff between the robustness of the control scheme and the saving of communication resources. Finally, the low-and high-probability stochastic deception attacks are considered in the simulations. The results have illustrated that the AoG synergistic turning system with the proposed control method follows a path with some large curvature well under stochastic deception attacks. Furthermore,compared with the static event-triggered mechanisms, the proposed I-ETM has demonstrated its superiority in saving communication resources.展开更多
文摘近年来,航空业发展迅猛,国内各家航空公司都在不断引进新飞机,退役老飞机,保持机龄年轻化,同时不断扩大机队规模.据数据统计截至2016年3月31日中国大陆地区各航空公司在役飞机总数为2814架,中国大陆地区各航空公司在役飞机和订购总数为4146架.预计未来20年中国民航需要6000架以上的飞机,价值近万亿美元.伴随着新机型的引进、新航线的开拓,对航空器维修的要求也是日益提高,航空器运营的时效性直接影响到航空公司的收益和品牌.随着B777、B787、A350、A380等新型长航程飞机的引入,飞机因故停场在国外的概率日益提升,本文以某航空公司B777飞机发动机故障需外站AOG(Aircraft On Ground)换发为例,系统性讲述航空公司机务维修各个部门之间如何履行职责、相互配合,最终高效完成任务,保证飞机持续适航参入机队运营.
基金supported in part by the National Science Fund for Excellent Young Scholars of China (62222317)the National Natural Science Foundation of China (61973319)+4 种基金the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (61860206014)111 Project of China (B17048)Science and Technology Innovation Program of Hunan Province (2022WZ1001)the Natural Science Foundation of Changsha (kq2208287)the Postdoctoral Fund of Central South University (22022136)。
文摘This article proposes an integral-based event-triggered attack-resilient control method for the aircraft-on-ground(AoG) synergistic turning system with uncertain tire cornering stiffness under stochastic deception attacks. First, a novel AoG synergistic turning model is established with synergistic reverse steering of the front and main wheels to decrease the steering angle of the AoG fuselage, thus reducing the steady-state error when it follows a path with some large curvature. Considering that the tire cornering stiffness of the front and main wheels vary during steering, a dynamical observer is designed to adaptively identify them and estimate the system state at the same time.Then, an integral-based event-triggered mechanism(I-ETM) is synthesized to reduce the transmission frequency at the observerto-controller end, where stochastic deception attacks may occur at any time with a stochastic probability. Moreover, an attackresilient controller is designed to guarantee that the closed-loop system is robust L2-stable under stochastic attacks and external disturbances. A co-design method is provided to get feasible solutions for the observer, controller, and I-ETM simultaneously. An optimization program is further presented to make a tradeoff between the robustness of the control scheme and the saving of communication resources. Finally, the low-and high-probability stochastic deception attacks are considered in the simulations. The results have illustrated that the AoG synergistic turning system with the proposed control method follows a path with some large curvature well under stochastic deception attacks. Furthermore,compared with the static event-triggered mechanisms, the proposed I-ETM has demonstrated its superiority in saving communication resources.
