Time-varying actuator fault reconstruction based on adaptive observer for LPV systems

2016 ◽  
Author(s):  
Radhia Houimli ◽  
Neila Bedioui ◽  
Mongi Besbes
Keyword(s):  
Adaptive Observer ◽  
Time Varying ◽  
Actuator Fault ◽  
Fault Reconstruction ◽  
Lpv Systems

Actuator fault reconstruction based on a robust adaptive observer

2018 ◽  
Vol 12 (15) ◽  
pp. 2076-2087 ◽  
Author(s):  
Zhiguo Han ◽  
Ke Zhang ◽  
Haipeng Liu
Keyword(s):  
Adaptive Observer ◽  
Actuator Fault ◽  
Fault Reconstruction ◽  
Robust Adaptive

Fault Estimation and Fault-Tolerant Control of Markovian Jump System With Mixed Mode-Dependent Time-Varying Delays Via the Adaptive Observer Approach

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Dunke Lu ◽  
Xiaohang Li ◽  
Jin Liu ◽  
Guohui Zeng
Keyword(s):  
Mixed Mode ◽  
Fault Tolerant ◽  
Adaptive Observer ◽  
Descriptor System ◽  
Fault Estimation ◽  
Simultaneous Estimation ◽  
Time Varying ◽  
Actuator Fault ◽  
Sensor Fault ◽  
Markovian Jump

In this paper, the problem on simultaneous estimation of the actuator and sensor faults is first addressed for a class of Markovian jump systems with mixed mode-dependent time-varying delays. By using a generalized system technique, the original system is first transformed into a descriptor one; its states consist of original states and sensor fault. Then, a Markovian adaptive observer is designed for the descriptor system to provide simultaneous estimations of the state, actuator fault, and sensor fault. In the light of online acquired information, a state-feedback-based fault-tolerant controller is constructed to stabilize the closed-loop system in the presence of the actuator fault. Using the Lyapunov–Krasovskii functions, sufficient and necessity conditions for the existence of designed observer and controller are derived in terms of linear matrix inequalities, which can be solved readily through efficient mathematical tools. Finally, numerical and practical examples are given to validate the effectiveness of the proposed method.

scholarly journals Actuator fault-based integrated control for vehicle chassis system

2020 ◽  
pp. 002029402097757
Author(s):  
Jinwei Sun ◽  
Jingyu Cong ◽  
Weihua Zhao ◽  
Yonghui Zhang
Keyword(s):  
Performance Enhancement ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Integrated Control ◽  
Stability Control ◽  
Actuator Fault ◽  
Roll Moment ◽  
Fault Reconstruction ◽  
Driving Conditions ◽  
Vehicle Chassis

An integrated fault tolerant controller is proposed for vehicle chassis system. Based on the coupled characteristics of vertical and lateral system, the fault tolerant controller mainly concentrates on the cooperative control of controllable suspension and lateral system with external disturbances and actuator faults. A nine-DOF coupled model is developed for fault reconstruction and accurate control. Firstly, a fault reconstruction mechanism based on sliding mode is introduced; when the sliding mode achieves, actuator fault signals can be observed exactly through selecting appropriate gain matrix and equivalent output injection term. Secondly, an active suspension controller, a roll moment controller and a stability controller is developed respectively; the integrated control strategy is applied to the system under different driving conditions: when the car is traveling straightly, the main purpose of the integrated strategy is to improve the vertical performance; the lateral controller including roll moment control and stability control will be triggered when there is a steering angle input. Simulations experiments verify the performance enhancement and stability of the proposed controller under three different driving conditions.

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