Fault estimation and fault tolerance control for spacecraft formation systems with actuator fault and saturation

2021 ◽  
Author(s):  
Zhifeng Gao ◽  
Sen Wang
Keyword(s):  
Fault Tolerance ◽  
Fault Estimation ◽  
Actuator Fault ◽  
Spacecraft Formation ◽  
Tolerance Control ◽  
Formation Systems

Parameter-dependent actuator fault estimation for vehicle active suspension systems based on RBFNN

2021 ◽  
pp. 095440702199301
Author(s):  
Wenping Xue ◽  
Pan Jin ◽  
Kangji Li
Keyword(s):  
Fault Tolerant ◽  
External Disturbance ◽  
Active Suspension ◽  
Fault Estimation ◽  
Linear Matrix ◽  
Actuator Fault ◽  
Mass Variation ◽  
Fe Method ◽  
Comparison Results ◽  
Parameter Dependent

The actuator fault estimation (FE) problem is addressed in this study for the quarter-car active suspension system (ASS) with consideration of the sprung mass variation. Firstly, the ASS is modeled as a parameter-dependent system with actuator fault and external disturbance input. Then, a parameter-dependent FE observer is designed by using the radial basis function neural network (RBFNN) to approximate the actuator fault. In addition, the design conditions are turned into a linear matrix inequality (LMI) problem which can be easily solved with the aid of LMI toolbox. Finally, simulation and comparison results are given to show the accuracy and rapidity of the proposed FE method, as well as good adaptability against the sprung mass variation. Moreover, a simple FE-based active fault-tolerant control (AFTC) strategy is provided to further demonstrate the effectiveness and applicability of the proposed FE method.

scholarly journals Fixed-Time Sliding-Mode Fault-Tolerant Control of Waste Heat Power Generator Systems

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Zhi Wang ◽  
Yateng Bai ◽  
Jin Xie ◽  
Zhijie Li ◽  
Caoyuan Ma ◽  
...  
Keyword(s):  
Fault Tolerant ◽  
Waste Heat ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Tracking Error ◽  
Fixed Time ◽  
Fault Estimation ◽  
Actuator Fault ◽  
Heat Power ◽  
Time Control

In order to overcome disturbances such as the instability of internal parameters or the actuator fault, the time-varying proportional-integral sliding-mode surface is defined for coordinated control of the excitation generator and the steam valve of waste heat power generation units, and a controller based on sliding-mode function is designed which makes the system stable for a limited time and gives it good performance. Based on this, a corresponding fault estimation law is designed for specific faults of systems, and a sliding-mode fault-tolerant controller is constructed based on the fixed-time control theory so that the systems can still operate stably when an actuator fault occurs and have acceptable performance. The simulation results show that the tracking error asymptotically tends to be zero, and the fixed-time sliding-mode fault-tolerant controller can obviously improve the dynamic performance of the system.

scholarly journals Actuator fault tolerance evaluation approach of nonlinear model predictive control systems using viability theory

2018 ◽  
Vol 71 ◽  
pp. 35-45 ◽  
Author(s):  
Majid Ghaniee Zarch ◽  
Vicenç Puig ◽  
Javad Poshtan ◽  
Mahdi Aliyari Shoorehdeli
Keyword(s):  
Fault Tolerance ◽  
Model Predictive Control ◽  
Control Systems ◽  
Predictive Control ◽  
Nonlinear Model ◽  
Nonlinear Model Predictive Control ◽  
Actuator Fault ◽  
Viability Theory ◽  
Evaluation Approach

Actuator fault estimation based on adaptive H∞ observer technique

2009 ◽  
Author(s):  
Fei Zhang ◽  
Guangjun Liu ◽  
Lijin Fang
Keyword(s):  
Fault Estimation ◽  
Actuator Fault

Actuator Fault Estimation Based On Adaptive Iterative Learning Algorithm For Nonlinear Periodic Systems

2021 ◽  
Author(s):  
Ya-qi Liu ◽  
Yi-ming Fang ◽  
Le Liu ◽  
Xing-da Li
Keyword(s):  
Learning Algorithm ◽  
Iterative Learning ◽  
Periodic Systems ◽  
Fault Estimation ◽  
Actuator Fault

Active fault tolerance control system of fuel cell hybrid city bus

2010 ◽  
Vol 35 (22) ◽  
pp. 12510-12520 ◽  
Author(s):  
Liangfei Xu ◽  
Jianqiu Li ◽  
Minggao Ouyang ◽  
Jianfeng Hua ◽  
Xiangjun Li
Keyword(s):  
Control System ◽  
Fuel Cell ◽  
Fault Tolerance ◽  
Cell Hybrid ◽  
Active Fault ◽  
City Bus ◽  
Tolerance Control ◽  
Fuel Cell Hybrid
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