Fault detection method of nonlinear network control system based on event triggering mechanism

A network control system and fault detection technology, applied in general control systems, control/adjustment systems, test/monitoring control systems, etc., can solve problems such as aggravated network-induced delay, data packet loss, limited network bandwidth waste, etc., to achieve Effects of reducing conservatism, solving fault detection problems, and increasing fault sensitivity

Active Publication Date: 2018-10-16
NORTHEASTERN UNIV
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Problems solved by technology

Therefore, time triggering is easy to cause waste of limited network bandwidth, further aggravating network-induced delay and data packet loss

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  • Fault detection method of nonlinear network control system based on event triggering mechanism
  • Fault detection method of nonlinear network control system based on event triggering mechanism
  • Fault detection method of nonlinear network control system based on event triggering mechanism

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Embodiment Construction

[0052] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0053] In this embodiment, the fault detection method of the nonlinear network control system based on the event-triggered mechanism of the present invention is used to detect the fault of the nonlinear network control system.

[0054] Fault detection methods for nonlinear networked control systems based on event-triggered mechanisms, such as figure 1 shown, including the following steps:

[0055] Step 1: For a nonlinear networked control system with process faults, sensor faults and output disturbances, the Takagi-Sugeno (T-S) fuzzy model method is used for modeling and analysis, and the T-S fuzzy model of the nonlinear networked control system is established;

[0056] ...

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Abstract

The invention provides a fault detection method of a nonlinear network control system based on an event triggering mechanism, and relates to the technical field of network system fault detection. Themethod comprises the following steps: firstly, establishing a T-S fuzzy model of the nonlinear network control system, setting an event triggering condition, establishing a fuzzy fault detection filter model, establishing a fault weighting system, and then establishing a fault detection system model; selecting an appropriate residual evaluation function and a detection threshold according to the fault detection system model, and detecting whether a fault of the nonlinear network control system occurs; and finally, further designing a parameter matrix and an event triggering matrix of a fault detection filter according to the stability of the fault detection system and sufficient conditions of existence of the fault detection filter. By adoption of the fault detection method of the nonlinear network control system based on the event triggering mechanism provided by the invention, the robustness to external disturbance and communication delay is greatly improved, and the limited networkresources and computing resources can be saved by the application of the event triggering mechanism.

Description

technical field [0001] The invention relates to the technical field of network system fault detection, in particular to a fault detection method for a nonlinear network control system based on an event trigger mechanism. Background technique [0002] Due to its low cost of installation and maintenance, high security and reliability, and flexible communication structure, networked control systems have gained widespread attention in complex industrial control systems. In a networked control system, sensors, actuators, and controllers are interconnected through a shared communication network. With the increasing requirements of networked control systems for security, stability, and high performance, the problem of fault detection for networked control systems has become an important research field. [0003] Due to the introduction of the communication network and the characteristics of the network control system itself, it inevitably brings new problems and challenges to the n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24G05B23/02
CPCH04L41/0631H04L41/0695H04L41/145G05B23/0254
Inventor 王迎春郑龙飞杨东升庞萌萌谷永强王占山会国涛刘振伟
Owner NORTHEASTERN UNIV
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