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Adaptive fuzzy fault-tolerant control method for a class of nonlinear systems

A nonlinear system, adaptive fuzzy technology, applied in the field of fault-tolerant control of a class of nonlinear systems

Active Publication Date: 2021-12-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

However, on the one hand, when designing controllers, existing literature assumes that the state of the system is measurable and assumes that the upper bound of the disturbance is known; on the other hand, when designing controllers, relatively few literatures consider Event triggers to reduce system transfer load
It is still a challenge to design a reliable fault-tolerant control method for nonlinear systems while maintaining stability control while reducing the amount of system information transmission.

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  • Adaptive fuzzy fault-tolerant control method for a class of nonlinear systems
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  • Adaptive fuzzy fault-tolerant control method for a class of nonlinear systems

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Embodiment Construction

[0015] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0016] Considering a class of nonlinear systems affected by actuator faults and external disturbance factors, actuator faults consider several forms of actuator failures, paranoid faults, etc., combined with fuzzy logic theory, the comprehensive control of this type of nonlinear system is obtained Model. Consider the bias fault and disturbance of the system as the total disturbance, assuming that the total disturbance ξ z (t) satisfy the following conditions, in is an unknown gain, and z(t) represents a new variable related to interference information.

[0017] The fu...

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Abstract

The invention discloses a self-adaptive fuzzy fault-tolerant control method for a class of nonlinear systems. First, a class of nonlinear system state space models with actuator faults and external disturbances are established. Secondly, the fuzzy comprehensive observer includes fuzzy state observer, fault failure factor observer and disturbance observer. The observed information is then used by an adaptive sliding mode controller to compensate for the effects of faults and disturbances on the system. In addition, the dual-channel event trigger mechanism includes two sets of event trigger conditions from the sensor to the controller and from the controller to the actuator. Finally, an event-triggered based fault-tolerant controller incorporates a controller-to-actuator trigger mechanism whose output acts on a nonlinear system. The invention can effectively solve the effective fault-tolerant control performance and trajectory tracking control of a kind of nonlinear system under the condition of actuator failure and external disturbance.

Description

technical field [0001] The invention belongs to the field of fault-tolerant control of a class of nonlinear systems with actuator faults and external disturbances, more specifically, relates to a class of nonlinear systems subject to actuator faults and external disturbances, a fuzzy comprehensive observer, and an adaptive sliding mode The controller, dual-channel event-triggered mechanism, and event-triggered-based controller are collectively referred to as a class of adaptive fuzzy fault-tolerant control methods for nonlinear systems. Background technique [0002] With the rapid development of industry, modern industrial systems contain more and more nonlinear units to achieve richer system performance. Therefore, maintaining system reliability is very important for nonlinear systems to complete predetermined tasks. However, due to the continuous increase of system components, the nonlinear unknowns of the system and the dynamics of unknown coupling factors appearing in sy...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042G05B13/0275
Inventor 郭斌陈勇李万富李猛陈章勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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