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Non-fragile dissipative filtering method of nonlinear networked control system

A networked control, non-linear technology, applied in signal pattern recognition, instrument, character and pattern recognition, etc., can solve the problem of packet loss, not considering filters, etc.

Active Publication Date: 2017-03-22
毛国全
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  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of the communication network has led to the following problems in the system: 1) Network delay: When data is transmitted in the communication network due to network congestion or external interference, there is a problem of network delay in the networked control system; 2) Packet loss : In the process of data transmission, due to network congestion and resource competition, the problem of data packet loss will be caused
The above research on dissipative filtering only considers delay or packet loss, and does not consider that the parameters of the filter itself will change due to external interference. However, in actual situations, delay and packet loss exist at the same time. And the parameters of the filter itself will also be affected by interference changes, so it is very important to use non-fragile filtering, which can make the system quickly stable, the level of disturbance suppression is better, and the filter estimation effect is better

Method used

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[0228] Using a non-fragile dissipation filtering method for a networked control system proposed by the present invention, the networked filtering error system is stochastically stable when there is no external disturbance, that is, when w(k)=0. When there is external disturbance, the system is also stochastically stable and has certain anti-interference ability. The specific implementation method is as follows:

[0229] Step 1: Consider the following networked control system:

[0230]

[0231] y(k)=[2 -3 5]x(k)+2w(k)

[0232] z(k)=[-0.1 0.3 -0.2]x(k)

[0233] Consider the following given parameters:

[0234]

[0235]

[0236] h 3 =[1 0 0],E 2 =0.02

[0237]

[0238] Take here When there is a parameter perturbation F 1 (k)=F 2 (k)=F 3 (k)=F 4 When (k)=I, it is assumed that the system disturbance input w(k)=1 / k 2 , consider the dissipative filtering problem of the system when Q, S, R select different values, where H ∞ Filtering can be seen as a special ...

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Abstract

The present invention discloses a non-fragile dissipative filtering method of a nonlinear networked control system. The method comprises the steps of firstly establishing a nonlinear networked filtering error system model on the conditions of considering the time delay and the packet loss of the nonlinear networked control system and the perturbation of the filter parameters, then constructing a Lyapunov function, and then utilizing a Lyapunov stability theory and a linear matrix inequality analysis method to obtain the sufficient conditions of the mean square exponential stability of a nonlinear networked filtering error system and the existence of a non-fragile dissipative filter, utilizing a Matlab LMI tool kit to solve, and definding a non-fragile dissipative filter parameter matrix. The method of the present invention considers the random time delay and the pocket loss situations between the sensors and the filters, is suitable for the general dissipative filtering including the H-infinite filtering, and enables the conservatism of the non-fragile dissipative filter design to be reduced. Moreover, a non-modeling state of the system is considered when a full-order filter is designed, thereby being able to reduce the calculation burdens and the design cost.

Description

technical field [0001] The invention relates to a nonlinear networked control system and dissipation filtering, in particular to a non-fragile dissipation filtering method of a nonlinear networked control system with time delay and packet loss. Background technique [0002] The closed-loop control system formed through the communication network is called networked control system (networked control system, abbreviated as NCSs). NCSs has the advantages of convenient installation and maintenance, high flexibility and easy reconfiguration. However, the introduction of the communication network has led to the following problems in the system: 1) Network delay: when data is transmitted in the communication network due to network congestion or external interference, there is a problem of network delay in the networked control system; 2) Packet loss : In the process of data transmission, due to network congestion and resource competition, the problem of data packet loss will be caus...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06F2218/02
Inventor 潘丰王剑峰
Owner 毛国全
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