基于故障程度的自适应优化容错控制

Adaptive Optimal Fault-Tolerant Control Based on Fault Degree

为了解决故障严重程度等级划分缺乏依据、传统经验直接划分可靠度不高局限明显等问题,提出一种结合间隙度量方法的故障程度等级度量标准。引入间隙度量的相关方法定义一种新的故障等级划分方法,通过这种故障等级划分方法可以直观便捷地确定故障的严重程度。根据不同的故障情况,结合预设的最优容错控制措施对故障系统进行容错控制,有效地提升了系统的鲁棒性和稳健性。设计了两种不同形式的基于故障程度的自适应优化容错控制器,并对容错控制的效果进行了对比分析,仿真实验验证了该方法的有效性,与常规容错方法相比更加灵活高效。

In order to solve the problems such as the lack of basis for the classification of fault severity and the obvious limitation of the direct classification of reliability by traditional experience,a fault severity metric standard combined with gap metric method is proposed.Firstly,a new fault classification method is defined by introducing the method of gap metric,through which the fault severity can be determined intuitively and conveniently.Then,according to different fault conditions,the fault-tolerant control of the fault-tolerant system is combined with the preset optimal fault tolerant control measures,so as to effectively improve the robustness of the system.Finally,two kinds of adaptive optimal fault-tolerant controllers based on fault degree are designed,and the effect of fault-tolerant control is compared and analyzed.Simulation results show that the proposed method is more flexible and efficient than conventional fault-tolerant methods.