Control allocation based fault tolerant control of descriptor system with actuator saturation

2021 ◽  
Author(s):  
Ariful Mashuda ◽  
Manas Kumar Bera
Keyword(s):  
Actuator Saturation ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Descriptor System ◽  
Control Allocation

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.

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 Flight evaluation of a sliding mode online control allocation scheme for fault tolerant control

Automatica ◽  
2020 ◽  
Vol 114 ◽  
pp. 108829 ◽  
Author(s):  
Lejun Chen ◽  
Christopher Edwards ◽  
Halim Alwi ◽  
Masayuki Sato
Keyword(s):  
Fault Tolerant ◽  
Sliding Mode ◽  
Fault Tolerant Control ◽  
Online Control ◽  
Control Allocation ◽  
Allocation Scheme

scholarly journals PI-Based Fault Tolerant Control For Fixed-Wing UAVs Using Control Allocation

2017 ◽  
Vol 50 (2) ◽  
pp. 181-186 ◽  
Author(s):  
Jimoh O. Pedro ◽  
Thando B. Tshabalala
Keyword(s):  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Control Allocation
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