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A Robust Tracking Control Method for Networked Control Systems Based on Switching Control Theory

A network control system, tracking control technology, applied in general control systems, control/regulation systems, data exchange networks, etc., can solve problems such as system performance deterioration

Inactive Publication Date: 2017-09-05
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the time lag problem is one of the main problems faced by the network control system, and it is often an important reason for the deterioration of system performance.

Method used

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  • A Robust Tracking Control Method for Networked Control Systems Based on Switching Control Theory
  • A Robust Tracking Control Method for Networked Control Systems Based on Switching Control Theory
  • A Robust Tracking Control Method for Networked Control Systems Based on Switching Control Theory

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Embodiment 1

[0127] The implementation mode and operation process of the technical solution will be specifically described below with reference to two examples, and the superiority of the present invention will be verified. Taking a continuous second-order plant and a second-order tracking reference model as examples, the state space expressions of the two are as follows:

[0128] Accused object:

[0129]

[0130] y(t)=[1 0]x(t)

[0131] Track reference model:

[0132]

[0133] in

[0134] r(t)=5sin(0.8t)

[0135] ω(t)=0.2sin(10t) (17)

[0136] Status FeedbackH ∞ The specific design steps of the robust tracking controller are as follows:

[0137] (1) Based on the rasterization method of the present invention, the time-varying delay is discretized. Suppose the time axis is divided into 0.1ms small time, that is, l=0.1ms, the maximum allowable delay τ max =0.3ms, then the possible network-induced delay is τ 1 =0.05ms,τ 2 =0.1ms,τ 3 = 0.15ms, for simplicity, assume the maximu...

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Abstract

A robust tracking control method for networked control systems based on switching control theory, which establishes a time- and event-mixed node-driven mechanism for active variable sampling to ensure that the network-induced delay is always less than one sampling period; time and event mixing based on active variable sampling Node-driven mechanism to establish a tracking control model of an uncertain networked control system: Based on the rasterization processing method, the tracking control model of a networked control system is transformed into a switching system model with limited switching rules, and a discretization that satisfies a given disturbance suppression level is designed. The H∞ robust tracking controller of the network control system finally realizes the tracking control of the network control system under the condition of communication limitation and system uncertainty. Good inhibitory effect.

Description

technical field [0001] The present invention relates to the field of automatic control technology, in particular to a robust tracking control method for network control systems based on switching control theory, mainly aimed at transmission time lag, packet loss, system uncertainty and external disturbance factors caused by network introduction The performance degradation or even instability of the control system caused by the problem, based on the switching control system theory, the time-varying tracking control model of the uncertain network control system including tracking error is established, and the performance of the uncertain discrete network control system with time delay and packet loss is analyzed. h ∞ Output tracking performance, and gives the H that satisfies a given disturbance suppression level ∞ A method for robust tracking control. Background technique [0002] With the increasing development and cross-penetration of control science, computer technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04H04L12/26
Inventor 吴莹吴彦鹏李皎
Owner XI'AN PETROLEUM UNIVERSITY