Non-fragile dissipation control method of non-linear networked control system

Abstract

The invention discloses a non-fragile dissipation control method of a non-linear networked control system. Considering the uncertainties of sector-bounded nonlinearity, random packet loss and model parameters of the networked control system and the gain perturbations of a controller, the method includes the following steps: firstly establishing a closed-ring non-linear networked control system model, constructing a proper Lyapunov function, using the Lyapunov stability theory and the linear matrix inequality analysis method, obtaining mean square index stability of the non-linear networked control system and the sufficient condition for the existence of a non-fragile dissipation controller, using a Matlab LMI tool kit to obtain a solution, providing a gain matrix of the non-fragile dissipation controller as (as shown in the specification). According to the invention, the method fully considers packet loss of sensor-controller and controller-sensor. The occurrence probability of packet loss meets Bernoulli distribution and is more significant, is suitable to common dissipation control, includes H infinite control, and reduces the conservative property of non-linear controllers.

Description

technical field [0001] The invention relates to a networked control system and dissipation control, in particular to a non-fragile dissipation control method of a nonlinear networked control system with packet loss. Background technique [0002] Networked control systems (NCSs for short) refer to closed-loop feedback control systems formed through the network. This network-based control system has the advantages of convenient installation and maintenance, high flexibility and easy reconfiguration. However, the intervention of the network has caused the following problems in the system: 1) Packet loss: During data transmission, due to network congestion and resource competition, the problem of data packet loss will be caused; 2) Network delay: When data is transmitted in the communication network due to Due to network congestion or external interference, there is a problem of network delay in the networked control system; 3) Uncertainty of system parameters: In order to desig...

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Problems solved by technology

However, the intervention of the network has caused the following problems in the system: 1) Packet loss: During data transmission, due to network congestion and resource competition, the problem of data packet loss will be caused; 2) Network delay: When data is transmitted in the communication network due to Due to network congestion or external interference, there is a problem of network delay in the networked control system; 3) Uncertainty of system parameters: In order to design an effective control system, a complex system must be described by a relatively simple model , and the lack of sufficient understanding of certain characteristics or links of the system lead to certain uncertainties in the used mathematical models; 4) Uncertainty in controller gain: Industrial instruments and control components are affected by their own physical characteristics and environmental factors Influenced by the controller, there is a certain error or change in the controller parameters, and the slight perturbation of the controller parameters may lead to the performance degradation of the closed-loop system, and even the stability is destroyed.

However, the existing research results do not consider the influence of physical characteristics and environmental factors on the controller gain, which has certain limitations, and a small perturbation of the controller parameters may lead to a decrease in the performance of the closed-loop system, and even damage the stability

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