一类短时延网络化控制系统的故障检测与容错控制

摘要

研究了一类可离散化的非线性网络化控制系统的故障检测和容错控制问题。针对一类非线性网络化控制系统，考虑系统的网络时延，利用 T-S 模糊模型建立具有不确定参数的离散的系统模型；采用输出反馈控制，设计系统的模糊状态观测器，并利用模糊观测器和控制器协同设计的方法，考虑系统可能出现传感器发生失效故障的情况，给出并证明了系统保持渐近稳定的充分条件，利用观测器系统输出误差对系统进行故障检测。最后通过实例仿真对理论的有效性进行验证。%　　Problems on fault detection and fault-tolerant control of networked control systems with discrete and nonlinear model were studied. On the basis of network control system for the nonlinear model by the T-S fuzzy model, the research considered the network delay and used the T-S fuzzy model of the system model with uncertain parameters, and then a fuzzy state observer was designed. As the sensor failure may occur, fault-tolerant control theory was used and fuzzy controller and fuzzy observer co-design methods were applied. To the effect, all these prove that the system can still maintain a sufficient condition for asymptotic stability of the sensor failure. The research also used observer system and its output error to detect the fault of the system. Simulation is used to verify the validity of the theory.