Fault detection method of positive linear network control system based on robust filter

A network control system and fault detection technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve the problems of network channel quality and network traffic congestion, and achieve a wide range of applications and good anti-interference effects. Effect

Active Publication Date: 2021-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This delay may depend on variable network conditions such as network channel quality and network traffic congestion due to the limited bandwidth of the communication network

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  • Fault detection method of positive linear network control system based on robust filter
  • Fault detection method of positive linear network control system based on robust filter
  • Fault detection method of positive linear network control system based on robust filter

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[0049] In order to describe the technical solution disclosed in the present invention in detail, further elaboration will be made below in conjunction with the accompanying drawings and specific implementation methods.

[0050] A fault detection method for a positive linear network control system based on a robust filter, comprising the following steps:

[0051] The first step is to set the discrete model of the positive linear networked control system, and then design the corresponding robust filter;

[0052] In the second step, an augmented system is established by combining the discrete model and the designed filter to generate residuals;

[0053] The third step is to select an appropriate residual evaluation function and threshold, and give a fault detection scheme;

[0054] The fourth step is to use the upper and lower bound information of uncertain parameters to derive the augmented system as a positive system, which is stable and satisfies l 1 / l - Sufficient conditi...

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Abstract

The invention discloses a fault detection method for a positive linear network control system based on a robust filter. Firstly, according to the current situation of networked control system with time delay and uncertainty, a discrete model of positive linear networked control system is established, and the corresponding robust filter is designed accordingly; based on this discrete model and filter, an augmented system is established, Then, by scaling the upper and lower bounds of the uncertain parameters, the augmented system is derived as a positive system, which is stable and satisfies l 1 / l ‑ (robustness / fault sensitivity) is a sufficient condition for performance; finally, through an iterative algorithm, combined with the optimization objective, the filter parameters are solved, that is, while taking into account the robustness and fault sensitivity, the fault of the positive linear network control system can be realized. detection. Through the iterative algorithm, the invention greatly widens the application range, improves the efficiency of fault detection, and can be applied to various sensory / non-sensor fault systems with uncertain parameters.

Description

technical field [0001] The invention relates to the field of system control, in particular to a fault detection method of a positive linear network control system based on a robust filter. Background technique [0002] A network control system (NCS) refers to the connection between the controlled object and the controller through a network. Its characteristic is that information such as system input and output is exchanged between system components (sensors, controllers, and actuators) through the network. NCS is playing an increasingly important role in social infrastructure, such as smart homes, smart grids, and modern public transportation systems. In the past decade, researchers of systems and control have developed mechanism systems science and control engineering methods, such as frequency domain method, time domain method, state space method, robust control method, stochastic control method, etc., and computer science and Network researchers have achieved remarkable ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 沈俊蒋靖雯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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