基于仿真的操舵系统故障风险分析方法

Fault risk analysis method of steering system based on simulation

操舵系统的故障风险分析需求迫切,但传统基于经验的安全性分析技术在历史故障数据匮乏的情况下作用有限。为此,提出一种基于仿真的操舵系统故障风险分析方法。基于AMESim建立操舵系统的虚拟样机,并对其进行校核与验证以确保其可信性。进行典型故障模式的植入与仿真实验以获取故障仿真数据,并与Simulink进行运行场景的动力学联合仿真,根据仿真结果体现的安全风险对故障模式进行分类。以某型潜航器操舵系统为案例验证了所提出方法的有效性,该方法可为操舵系统及其他大型复杂机电液控制系统的故障风险分析提供参考。

Fault risk analysis of steering system is of great significance. However, the traditional safety analysis methods based on experience is limited in application because of the short of historic fault data. This paper proposed a fault risk analysis method based on simulation. The virtual prototyping of steering was built on AMESim, which was verified and validated afterwards. On this basis, fault injection and fault simulation was conducted on the prototyping to get the simulated fault data. Simulink was employed to conduct dynamics co-simulation of running scenario, thus fault modes could be classified based on the safety risk reflected by the simulation results. A case study of underwater vehicle steering system was studied to verify the proposed method. This method may provide an available choice for the fault risk analysis of steering system and other large-scale and complicated mechanic-electronic-hydraulic control systems.