Fault Estimation and Fault-Tolerant Control of Nonlinear Systems with Polynomial Faults

In this paper, the issue of fault estimation and fault tolerant control(FTC) of non-linear systems on the basis of event-triggered strategies is studied. The fault dynamics is designed as a case of a known polynomial function that can be represented as a function of time. The use of an event-triggered communication mechanism allows the sampled output to be transported across the network only when the given trigger condition is satisfied, thus greatly saving network communication resources. A fault estimation observer is devised to simultaneously evaluate the system state and fault signals without considering time-varying network communication delays, providing a basis for designing fault-tolerant controllers. Build a fault-tolerant controller based on estimated signals of state and fault from observers to maintain the stability and performance of the system under fault conditions. Finally, the feasibility of the presented approach is illustrated by a simulation experiment.