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In this paper, the mechanism of fault diagnosis and fault warning is set up for a class of single-input single-output (SISO) nonlinear systems with actuator faults, and based on the established fault diagnosis mechanism, an adaptive fuzzy active fault-tolerant control (FTC) strategy is proposed. The considered actuator faults are bias and gain faults. The fault warning is constructed according to...
In this paper, an active output feedback fault-tolerant control design for submarine vertical movements is proposed. An unknown input disturbance observer is given first, and then an observer is designed to diagnose all of actuator faults by decoupling external disturbance from actuator faults. Then a fault parameter tracking law is designed to estimate the fault parameters of bow and stern planes...
In this paper, an active fault-tolerant scheme with performance degradation is proposed in the presence of actuator saturation and fault. Firstly, the loss of control effectiveness fault is transformed into an virtual additive fault and then the effectiveness factors are estimated by a two-stage Kalman filter algorithm with a set of forgetting factors. In order to satisfy the output tracking performance,...
Due to the flight scale of Hypersonic Vehicle (HSV) is extremely large, the system must have strong nonlinearity, coupling, fast time-variability and also be sensitive to disturbance and fault. It is a big challenge for fault-Tolerant control. Therefore, a fault-tolerant control scheme, nonlinear generalized predictive control (NGPC) law combined with sliding mode disturbance observer (SMDO), which...
An automatic disturbance rejection control (ADRC)-based model predictive torque control (MPTC) strategy is developed for permanent magnet synchronous motors (PMSMs) fed by three-phase four-switch inverters. The model of a PMSM fed by a three-phase four-switch inverter is built firstly. Then the ADRC and MPTC are respectively designed. The resultant ADRC-based MPTC PMSM fed by an unhealthy inverter...
The problem of fault-tolerant tracking control is studied for a class of uncertain nonlinear systems with actuator failures. An adaptive neural networks (NNs) fault-tolerant tracking control strategy is proposed by combing backstepping with NNs, the implicit function theory, the mean value theorem and the dynamic surface control (DSC) technique. It is proven that it can guarantee all signals in the...
This paper is concerned with the problem of adaptive fault-tolerant H∞ directional control for an autonomous airship with rudder fault. The type of fault considered is the loss of rudder effectiveness. Based on the online estimation of an eventual fault, an H∞ adaptive fault-tolerant directional controller design method is adopted, in which a compensate control law is added to reduce the effect of...
This paper investigates the problem of collision-free coordination tracking control for multi-agent system under modeling uncertainties, actuator faults and disturbances. By syncretizing the Null-Space-based Behavioral (NSB) control and finite-time control method, a novel reference velocity signal is predesigned to achieve finite-time obstacle avoidance and coordination tracking. Then a set of finite-time...
The paper combined the unfalsified control (UC) which is a data-driven method and Youla parameterization for fault-tolerant control (FTC). The controller reconstruction of the FTC method uses the Youla parameterization for handling with faulty mode. It is a passive and model-free FTC method without know about plant models or faults model. The candidate controller structure is pre-designed by the prior...
This paper presents a novel Fault Tolerant Control (FTC) method for Electric Vehicle (EV) with wheel hub motors and by-wire steering system, in order to improve the vehicle safety and directional stability in case of steering failure. The driving force of this Four Wheel Independent Drive (FWID) EV was generated from four in-wheel motors using by-wire technology. The main objective is to track the...
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