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Robustness fault-tolerant control method of networked control system based on interval type 2 T-S model

A network control system and networked control technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as numerous uncertain factors, complex structures, and data packet loss

Inactive Publication Date: 2019-07-16
HANGZHOU DIANZI UNIV
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  • Abstract
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Problems solved by technology

However, since the data needs to be transmitted in the network, there will inevitably be some problems, such as network-induced time lag, data packet loss, timing disorder, and network scheduling.
[0003] In addition, the scale of NCS is getting bigger and bigger, the structure is complex, and there are many uncertain factors. Once a certain part of the system fails, the loss caused is difficult to estimate

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  • Robustness fault-tolerant control method of networked control system based on interval type 2 T-S model
  • Robustness fault-tolerant control method of networked control system based on interval type 2 T-S model
  • Robustness fault-tolerant control method of networked control system based on interval type 2 T-S model

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, the present invention will be further described, and the present invention comprises the following steps:

[0039] (1) Use interval-type T-S fuzzy model to build a model for network control, and use IF-THEN rules to describe the network control system as follows:

[0040]

[0041] Among them, N ai is the antecedent variable θ a(x(t))(a=1,2,...,p) the fuzzy set under the ith (i=1,...,r) rule; is the system state vector; is the control input vector; is the interference vector, and ω(t)∈L 2 [0,∞); is the output vector; A i ,B 1i ,B 2i ,C i ,D i is a constant matrix with appropriate dimensions; ΔA i ,ΔB 1i is the parameter uncertainty matrix, and [ΔA i ΔB 1i ] = H i F(t)[E ai E. bi ]; H i ,E ai ,E bi is a known matrix, F(t) is an unknown matrix, and satisfies F T (t)F(t)≤I.

[0042] (2) Add membership function to the uncertain network control system, through single-point fuzzification, product re...

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Abstract

The invention discloses a robustness fault-tolerant control method of a networked control system based on an interval type 2 T-S model. Aiming a type of non-linear network control system with uncertain parameters, the method considers network induced delay. When an executor fails, a suitable fonctionelle is constructed based on the interval type 2 T-S model, so as to introduce a free weight matrixto represent relationships of all items in the formula, and a state feedback controller that enables the system to stabilize gradually and meets performance indexes is designed by using inequality scaling, matrix decomposition technique, mutual convex combination, improved Jensen's inequality and parallel distribution compensation technique. The interval type 2 T-S fuzzy model can approximate tothe global non-linear system by using any accuracy of the local linear system, makes up the type 1 fuzzy set in terms of processing of uncertain information, and makes calculation less complex compared with the type 2 fuzzy set.

Description

technical field [0001] The invention relates to the field of network control design based on fault-tolerant control, in particular to a robust fault-tolerant control method for a networked control system based on an interval-type T-S model. Background technique [0002] Network control system (NCS) is a closed-loop control system formed by connecting the controlled object, sensors, actuators and controllers through the network. figure 1 It is the structural block diagram of the networked control system. Compared with the traditional point-to-point connection control system, NCS has the advantages of low cost, few connections, and convenient system maintenance and installation. However, since data needs to be transmitted in the network, some problems cannot be avoided, such as network-induced time lag, data packet loss, timing disorder, and network scheduling. [0003] In addition, the scale of NCS is getting bigger and bigger, the structure is complex, and there are many u...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张富生李静静付世州周绍生
Owner HANGZHOU DIANZI UNIV
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