Method and system for detecting and controlling network control system

Abstract

The invention belongs to the field of control, and provides a method and system for detecting and controlling a network control system. Based on a continuous time system model of a controlled object, a controller acquires output signals collected through a sensor and passing through an analog-digital converter and the sampling time delay of network transmission, and the controller and a fault detector are designed. The fault detector detects fault detection signals, and meanwhile the controller outputs control signals to achieve closed-loop control over the controlled object. Therefore, the method and system for detecting and controlling the network control system avoids the model error brought by discretization modeling, fault information is taken into consideration with the design of an initiative fault-tolerant controller, and the needs of detecting faults accurately of the fault detector are further taken into consideration. Preferably, a cone complementarity linearization technology is called in the integral design process of the fault detector and the controller depending on a time-lag network control system, the solution of designing the controller is translated into a nonconvex optimization problem under a linear matrix inequality, and conservative properties are reduced greatly compared with lag irrelevance. Therefore, the method and system for detecting and controlling the network control system achieves fault detection and fault tolerance control.

Description

technical field [0001] The invention belongs to the field of control, in particular to a detection and control method and system for a network control system. Background technique [0002] With the continuous improvement of system performance, product quality, production capacity, low cost, and low consumption, modern engineering technology systems are developing in the direction of large-scale, complex, networked, and decentralized. The more complex and larger the system, the higher the probability of failure. When the failure of the system cannot be detected and eliminated in time, once a failure occurs, it will cause huge losses of personnel and property. For example, on July 23, 2011, in the "Yongwen Line" super high-speed rear-end collision accident, 40 people were killed and more than 200 people were injured because of failures in the signal and dispatching system that were not detected, eliminated and dealt with in time. Under a similar background, fault diagnosis a...

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Problems solved by technology

At present, the research on fault detection and fault-tolerant control of Networked Control System (NCS) with random and uncertain network time delay, data packet loss, and data disorder is mainly based on the discrete system model of NCS. , which is called the indirect method; however, the complexity and flexibi

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