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Network control system controller design method based on hidden semi-markov model

A technology of a network control system and a design method is applied in the field of network control system controller design based on a hidden semi-Markov model, and achieves the effects of low computation time, short operation time, and fast training process.

Inactive Publication Date: 2014-09-17
王岩 +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is these random factors that lead to different degrees of randomness in network delay and packet loss

Method used

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  • Network control system controller design method based on hidden semi-markov model
  • Network control system controller design method based on hidden semi-markov model
  • Network control system controller design method based on hidden semi-markov model

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Embodiment Construction

[0174] The design goal of the present invention includes two aspects: one, to realize the estimation of the network load state and the recognition of its transition probability; The networked control system satisfies robust stochastic stability. The specific index of the second goal is that the disturbance suppression level γ of the system is less than the set value of 1.5. In the specific implementation, the estimation of the network load state and the recognition of its transition probability, as well as the simulation and verification of the closed-loop control system are realized by means of Matlab.

[0175] Step 1: Parameter Identification

[0176] Divide the network load into four modes: low (L), medium (M), high (H), and congestion (C), use the Baum-Welch algorithm to train, and obtain the model parameters (that is, the state transition probability) as follows:

[0177] P = 0.6598 ...

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Abstract

Disclosed is a network control system controller design method based on a hidden semi-markov model. The method uses the hidden semi-markov model to describe a network load state and then carries out modeling on a network control system in which time delay and packet loss exist and according to a robust control theory, a semi-markov jump linear system theory and a Lyapunov theory, the method uses interval expression of a state self-transfer probability to offer sufficient conditions for existence of an easily solvable state feedback robustness H <infinity> controller of the network control system and offer a design method for a control law so that multimode switching control of the network control system is realized.

Description

(1) Technical field [0001] The invention relates to a design method of a robust H∞ controller for a network control system based on a hidden semi-Markov model, which is aimed at a network control system with time delay and packet loss, using a hidden semi-Markov model to describe and Modeling, and then using the semi-Markovian jump linear system theory and the interval expression of the state self-transition probability, a sufficient condition for the existence of a state-feedback robust H∞ controller for the networked control system that is easy to solve is given, and the control The design method of the law, and then realize the multi-mode switching control of the network control system, belong to the field of automatic control technology. (2) Background technology [0002] The basic structure diagram of the network control system is as follows: figure 1 As shown, in a networked control system, sensors, controllers, and actuators exchange information through a shared comm...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 王岩李超闫影
Owner 王岩
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