Fault-tolerant control for output tracking systems subject to actuator saturation and constant disturbances: an LMI approach

2011 ◽  
Author(s):  
Jinhua Fan ◽  
Zhiqiang Zheng ◽  
Youmin Zhang
Keyword(s):  
Actuator Saturation ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Tracking Systems ◽  
Lmi Approach ◽  
Output Tracking

Active fault-tolerant control for vertical tail damaged aircraft with dissimilar redundant actuation system using integral sliding mode control

2018 ◽  
Vol 233 (7) ◽  
pp. 2361-2378 ◽  
Author(s):  
Salman Ijaz ◽  
Mirza T Hamayun ◽  
Lin Yan ◽  
Cun Shi
Keyword(s):  
Actuator Saturation ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Fault Tolerant Control ◽  
Fault Estimation ◽  
Redundant Actuation ◽  
Severe Damage ◽  
Integral Sliding Mode ◽  
Actuation System ◽  
Electrohydraulic Actuator

The research about the dissimilar redundant actuation system has indicated the potential fault-tolerant capability in modern aircraft. This paper proposed a new design methodology to achieve fault-tolerant control of an aircraft equipped with dissimilar actuators and is suffered from vertical tail damage. The proposed design is based on the concept of online control allocation to redistribute the control signals among healthy actuators and integral sliding mode controller is designed to achieve the closed-loop stability in the presence of both component and actuator faults. To cope with severe damage condition, the aircraft is equipped with dissimilar actuators (hydraulic and electrohydraulic actuators). In this paper, the performance degradation due to slower dynamics of electrohydraulic actuator is taken in account. Therefore, the feed-forward compensator is designed for electrohydraulic actuator based on fractional-order control strategy. In case of failure of hydraulic actuator subject to severe damage of vertical tail, an active switching mechanism is developed based on the information of fault estimation unit. Additionally, a severe type of actuator failure so-called actuator saturation or actuator lock in place is also taken into account in this work. The proposed strategy is compared with the existing control strategies in the literature. Simulation results indicate the dominant performance of the proposed scheme. Moreover, the proposed controller is found robust with a certain level of mismatch between the actuator effectiveness level and its estimate.

scholarly journals Performance evaluation based fault tolerant control with actuator saturation avoidance

2011 ◽  
Vol 21 (3) ◽  
pp. 457-466 ◽  
Author(s):  
Boumedyen Boussaid ◽  
Christophe Aubrun ◽  
Mohamed Abdelkrim ◽  
Mohamed Gayed
Keyword(s):  
Performance Evaluation ◽  
Actuator Saturation ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Reference Trajectory ◽  
New Approach ◽  
System A ◽  
Loop Dynamics ◽  
Predictive Controller ◽  
Management Techniques

Performance evaluation based fault tolerant control with actuator saturation avoidanceIn this paper, a new approach regarding a reconfigured system is proposed to improve the performance of an active fault tolerant control system. The system performance is evaluated with an intelligent index of performance. The reconfiguration mechanism is based on a model predictive controller and reference trajectory management techniques. When an actuator fault occurs in the system, a new degraded reference trajectory is generated and the controller calculates new admissible controls. A constraint set and cost function are established to avoid actuator saturation and reduce the control energy spent in closed loop dynamics. The effectiveness of the proposed method is illustrated using a hydrothermal system subject to actuator faults and constraints on actuator dynamic ranges.

scholarly journals Robust fault tolerant control of continuous-time switched systems: An LMI approach

2021 ◽  
Vol 39 ◽  
pp. 100950
Author(s):  
Ayyoub Ait Ladel ◽  
Abdellah Benzaouia ◽  
Rachid Outbib ◽  
Mustapha Ouladsine ◽  
El Mostafa El Adel
Keyword(s):  
Continuous Time ◽  
Switched Systems ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Lmi Approach

Fault tolerant control using integral sliding modes with control allocation along the null-space

2020 ◽  
Vol 42 (11) ◽  
pp. 2011-2019
Author(s):  
Chengcheng Ma ◽  
Chunsheng Liu ◽  
Jiazhen Yao
Keyword(s):  
Actuator Saturation ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Null Space ◽  
Fault Tolerant Control ◽  
Control Allocation ◽  
Control Scheme ◽  
Small Gain ◽  
Actuator Constraints ◽  
The Stability

In this paper, a new fault tolerant control scheme with control allocation is presented. The pseudo-inverse along the null-space control allocation is applied to the fault tolerant control system to handle the actuator constraints. The stability of the overall closed-loop system is proved via the small gain theory. The null-space vector is viewed as uncertainty, and is disposed by an integral sliding mode controller and a robust controller. The simulation results show that the new method can solve both failure scenarios and actuator saturation problems well.

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