基于模型的飞控系统安全性分析研究

针对飞控系统安全性分析问题, 提出一种基于系统拓展模型(extended system model, ESM)的安全性分析方法。首先, 运用Simulink建立系统名义模型。然后, 对名义模型进行故障注入, 得到系统扩展模型, 观察故障情况下的系统响应并对系统进行安全性分析。最后, 选取操纵舵面系统(副翼/方向舵)为例。结果表明，系统故障拓展模型使得模型保持完整性和一致性, 能够模拟系统故障多状态模式, 保证了安全性分析结果的准确性和完整性。

Research on model-based safety analysis of flight control system

Aiming at the problem of safety analysis of flight control system, a safety analysis method based on extended system model (ESM) is proposed. Firstly, the nominal model of the system is established by Simulink. Secondly, the fault is injected into the nominal model to obtain the ESM, and the system response under the fault condition is observed and the system safety is analyzed. Finally, taking a control surface system (ailerons/rudder) as an example. The results show that the system fault expansion model which keeps the integrity and consistency of the model, can simulate the system fault multi-state mode, and ensures the accuracy and integrity of the safety analysis results.