Operator-based fault tolerant control for uncertain nonlinear systems

2016 ◽  
Author(s):  
Shuhui Bi ◽  
Lei Wang ◽  
Ming Zhang ◽  
Mingcong Deng
Keyword(s):  
Nonlinear Systems ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Uncertain Nonlinear Systems

scholarly journals Adaptive Robust Actuator Fault Accommodation for a Class of Uncertain Nonlinear Systems with Unknown Control Gains

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
Yuefei Wu ◽  
Dawei Ma ◽  
Jianyong Yao ◽  
Guigao Le ◽  
Zhenxing Mu ◽  
...  
Keyword(s):  
Nonlinear Systems ◽  
Fault Tolerant ◽  
Small Neighborhood ◽  
Fault Tolerant Control ◽  
Switching Function ◽  
Uncertain Nonlinear Systems ◽  
Control Approach ◽  
Fault Accommodation ◽  
Recursive Design ◽  
Unknown Control

An adaptive robust fault tolerant control approach is proposed for a class of uncertain nonlinear systems with unknown signs of high-frequency gain and unmeasured states. In the recursive design, neural networks are employed to approximate the unknown nonlinear functions, K-filters are designed to estimate the unmeasured states, and a dynamical signal and Nussbaum gain functions are introduced to handle the unknown sign of the virtual control direction. By incorporating the switching functionσalgorithm, the adaptive backstepping scheme developed in this paper does not require the real value of the actuator failure. It is mathematically proved that the proposed adaptive robust fault tolerant control approach can guarantee that all the signals of the closed-loop system are bounded, and the output converges to a small neighborhood of the origin. The effectiveness of the proposed approach is illustrated by the simulation examples.

Sign in / Sign up

Export Citation Format

Share Document