Improved disturbance-observer-based fault-tolerant control for the linear system subject to unknown actuator faults and multiple disturbances

2020 ◽  
pp. 1-11
Author(s):  
Xue Lin ◽  
Xiuming Yao
Keyword(s):  
Linear System ◽  
Disturbance Observer ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Actuator Faults ◽  
Multiple Disturbances

scholarly journals Robust Fault Tolerant Control for a Class of Time-Delay Systems with Multiple Disturbances

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Songyin Cao ◽  
Jianzhong Qiao
Keyword(s):  
Time Delay ◽  
Flight Control ◽  
Disturbance Rejection ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Delay Systems ◽  
Actuator Faults ◽  
Flight Control System ◽  
Multiple Disturbances ◽  
Fault Accommodation

A robust fault tolerant control (FTC) approach is addressed for a class of nonlinear systems with time delay, actuator faults, and multiple disturbances. The first part of the multiple disturbances is supposed to be an uncertain modeled disturbance and the second one represents a norm-bounded variable. First, a composite observer is designed to estimate the uncertain modeled disturbance and actuator fault simultaneously. Then, an FTC strategy consisting of disturbance observer based control (DOBC), fault accommodation, and a mixedH2/H∞controller is constructed to reconfigure the considered systems with disturbance rejection and attenuation performance. Finally, simulations for a flight control system are given to show the efficiency of the proposed approach.

A general fault tolerant control and management for a linear system with actuator faults

Automatica ◽  
2012 ◽  
Vol 48 (8) ◽  
pp. 1676-1682 ◽  
Author(s):  
Lijun Liu ◽  
Yi Shen ◽  
Earl H. Dowell ◽  
Chunhui Zhu
Keyword(s):  
Linear System ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Actuator Faults ◽  
Control And Management

Composite fault-tolerant control with disturbance observer for stochastic systems with multiple disturbances

2018 ◽  
Vol 355 (12) ◽  
pp. 4897-4915 ◽  
Author(s):  
Shixiang Sun ◽  
Xinjiang Wei ◽  
Huifeng Zhang ◽  
Hamid Reza Karimi ◽  
Jian Han
Keyword(s):  
Disturbance Observer ◽  
Stochastic Systems ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Multiple Disturbances

scholarly journals Memory Augmented Neural Network-Based Intelligent Adaptive Fault Tolerant Control for a Class of Launch Vehicles Using Second-Order Disturbance Observer

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Haipeng Chen ◽  
Kang Chen ◽  
Wenxing Fu
Keyword(s):  
Disturbance Observer ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Second Order ◽  
Launch Vehicles ◽  
Actuator Faults ◽  
Closed Loop System ◽  
Adaptive Laws ◽  
Attitude Dynamic ◽  
Adverse Influence

This paper focuses on the MANN-based intelligent adaptive fault tolerant control for a class of launch vehicles. Firstly, the attitude dynamic model of the launch vehicles suffering from the actuator faults and disturbances has been formulated. Secondly, the second-order disturbance observer has been designed for the launch vehicle to achieve the exact estimation and compensation of the time-varying disturbances. Meanwhile, the MANN has been introduced as online approximator, suppressing the adverse influence of the unknown nonlinearities. Moreover, several adaptive laws have been proposed to achieve the quick response to the actuator faults and the update of the MANN weights. As a result, the MANN-based intelligent adaptive fault tolerant control structure has been constructed for the launch vehicles. It has been proven that all the signals in the closed-loop system are bounded. Simulation results demonstrate the desired performance and the advantages of the proposed control algorithm.

Active fault tolerant control of turbofan engines with actuator faults under disturbances

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yan-Hua Ma ◽  
Xian Du ◽  
Lin-Feng Gou ◽  
Si-Xin Wen
Keyword(s):  
Active Fault ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Feedback Controller ◽  
Actuator Faults ◽  
Error Feedback ◽  
Turbofan Engine ◽  
Turbofan Engines ◽  
Interval Observer ◽  
State Error

AbstractIn this paper, an active fault-tolerant control (FTC) scheme for turbofan engines subject to simultaneous multiplicative and additive actuator faults under disturbances is proposed. First, a state error feedback controller is designed based on interval observer as the nominal controller in order to achieve the model reference rotary speed tracking control for the fault-free turbofan engine under disturbances. Subsequently, a virtual actuator based reconfiguration block is developed aiming at preserving the consistent performance in spite of the occurrence of the simultaneous multiplicative and additive actuator faults. Moreover, to improve the performance of the FTC system, the interval observer is slightly modified without reconstruction of the state error feedback controller. And a theoretical sufficiency criterion is provided to ensure the stability of the proposed active FTC system. Simulation results on a turbofan engine indicate that the proposed active FCT scheme is effective despite of the existence of actuator faults and disturbances.

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