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Fault Tolerant Control Systems for Uncertain Systems with Actuator Failures

A fault-tolerant control and control system technology, applied in the field of communications, can solve problems such as time delay and sequence disorder, limited network bandwidth, and reduced system performance.

Active Publication Date: 2020-12-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The network control system is a closed-loop control system composed of sensors, controllers, actuators, and the network between them. However, due to problems such as limited network bandwidth and network congestion, network control systems inevitably experience delays, packet loss, and timing disorder. And other problems, to a certain extent, reduce the system performance and even make the system unstable

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  • Fault Tolerant Control Systems for Uncertain Systems with Actuator Failures
  • Fault Tolerant Control Systems for Uncertain Systems with Actuator Failures
  • Fault Tolerant Control Systems for Uncertain Systems with Actuator Failures

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Embodiment Construction

[0049] Such as figure 1 It is a block diagram of the system structure of the present invention. The sensors, controllers and actuators all adopt a time-driven method, and the sampling time is synchronized. Considering the possible packet loss phenomenon in the network transmission process, the sensor and the controller, the controller and the actuator Adding switches to model packet loss.

[0050] Controlled objects of the network control system:

[0051]x(k+1)=Ax(k)+Bu(k) (1)

[0052] x(k) is the state input of the control system, u(k) is the control input, and A and B are constant matrices with certain dimensions.

[0053] In the actual control system, due to the interference of the external environment, the change of system parameters and the disturbance of unknown factors, there are uncertainties in the control system, and it is difficult to obtain an ideal system model. Considering the uncertainty, the controlled object model is:

[0054] x(k+1)=(A+ΔA)x(k)+(B+ΔB)u(k) (...

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Abstract

The invention discloses a fault tolerance control system of an uncertain system with a performer fault. A sensor, a controller and a performer in the network all uses a time driven manner, sampling time are synchronized, possible packet loss in the network transmission process is taken into consideration, switches are added between the sensor and the controller and the controller and the performerrespectively to model data packet loss, a model of a controlled object is established, and whether the performer works normally is determined according to a performer fault matrix. The fault tolerance control system has the advantages of being stable, and capable of carrying out fault tolerance control effectively.

Description

technical field [0001] The invention belongs to the technical field of communication and relates to a communication fault-tolerant control system. Background technique [0002] With the rapid development of computer technology, control technology and communication technology, network control system has attracted great attention in modern industry because of its advantages of resource sharing, less wiring, low cost and convenient control. The network control system is a closed-loop control system composed of sensors, controllers, actuators, and the network between them. However, due to problems such as limited network bandwidth and network congestion, network control systems inevitably experience delays, packet loss, and timing disorder. And other problems, to a certain extent, reduce the system performance and even make the system unstable. In recent years, researchers have paid more attention to the safety performance of the system, and fault-tolerant control has become a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0243G05B2219/24065
Inventor 赵景波沈汉文王众薛秉鑫廖鹏浩
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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