In this paper, an online flight envelope protection system is developed and implemented on impaired aircraft with structural damage. The whole protection system is designed to be a closed loop of several subsystems, including system identification, damage classification, flight-envelope prediction, and fault-tolerant control. Based on the information given by damage classification, the flight envelopes are explicitly retrieved, processed online from the database, and fed into the fault-tolerant controller, which makes the protection system adaptive to a wide range of abnormal conditions. Simulation results show that with envelope protection, loss-of-control accidents are more likely to be prevented, since excessive commands to the controller are restricted based on the updated information of the changed flight envelopes. In this way, the fault tolerance of the impaired aircraft can be effectively enhanced.

在本文中，开发了一种在线飞行包络保护系统，并在有结构损坏的受损飞机上实施。整个保护系统被设计成几个子系统的闭环，包括系统识别，损坏分类，飞行包络预测和容错控制。根据损坏分类提供的信息，可以明确地检索飞行包线，从数据库进行在线处理，然后将其输入到容错控制器中，从而使保护系统适应各种异常情况。仿真结果表明，通过包络线保护，由于基于更改后的包络线的更新信息限制了对控制器的过多命令，因此更有可能避免失控事故。通过这种方式，