Event-Triggered Adaptive Fault Tolerant Control for a Class of Uncertain Nonlinear Systems

Abstract

This paper considers an adaptive fault-tolerant control problem for a class of uncertain strict feedback nonlinear systems, in which the actuator has an unknown drift fault and the loss of effectiveness fault. Based on the event-triggered theory, the adaptive backstepping technique, and Lyapunov theory, a novel fault-tolerant control strategy is presented. It is shown that an appropriate comprise between the control performance and the sensor data real-time transmission consumption is made, and the fault-tolerant tracking control problem of the strict feedback nonlinear system with uncertain and unknown control direction is solved. The adaptive backstepping method is introduced to compensate the actuator faults. Moreover, a new adjustable event-triggered rule is designed to determine the sampling state instants. The overall control strategy guarantees that the output signal tracks the reference signal, and all the signals of the closed-loop systems are convergent. Finally, the fan speed control system is constructed to demonstrate the validity of the proposed strategy and the application of the general systems.

High accuracy robust attitude tracking control application on quadrotor UAV with the prescribed performance

“…Based on (21) and (25), it is obtained that the auxiliary function L 1 is nonnegative. Based on the Lyapunov stability theory, the following Lyapunov function is designed…”

“…On the other hand, on account of the widespread disturbances including internal disturbances of control system and external random disturbances exist in the control system, the problem of robust disturbance rejection control has always been a research focus in the theory of control. [22][23][24][25] The control system of quadrotor UAV is more susceptible to disturbances due to under-actuated and special structure. For stability performance of a quadrotor UAV under different types of the disturbances, a backstepping controller based on high-order extend state observer was designed in Shi et al 26 In Castillo et al, 27 an attitude controller based on disturbance observer was presented for a quadrotor that guarantees tracking performance under aggressive attitude maneuvers and external disturbances.…”

The Antarctic Astronomical Observations Intelligent Support Equipment “Dome A” Site-Testing Observatory: Electric Power Generation and Control Systems

“…For example, if the working generator operation fails, another generator must be started up to ensure stable energy power. When the core control equipment (like central controller) malfunctions or a communication link disconnects, a spare controller or communication link must take over the work instantaneously and automatically [33].…”

A Robust Fault-Tolerant Control for Quadrotor Helicopters against Sensor Faults and External Disturbances

“…Nonetheless, fault diagnosis is a very important procedure, and it is not sufficient to ensure safe operation of the quadrotor helicopter. For safety-critical systems, the diagnosis of a particular system fault is not the ultimate goal, whereas the continuity of operation is a key feature, and the closed-loop system should be capable of maintaining its prespecified performance in terms of quality, safety, and stability despite the presence of faults [27]. is calls for the appearance of FTC systems.…”