IMC and PSC method of random time delay of TITO (Two-input and Two-output) NDCS

Abstract

An IMC and PSC method of random time delay of TITO NDCS belongs to the technical field of multiple-input and multiple-output NDCS with limited bandwidth resources. Mutual influence and coupling between TITO signals needs to be decoupled by the TITO-NDCS; network time delay generated in the network data transmission process between the nodes influences the stability of closed-loop control circuits and the stability of the whole system and even causes that the TITO-NDCS loses stability; the method in which a real network data transmission process among all the nodes of the TITO-NDCS replaces a network time delay compensation model is provided to implement IMC and SPC on the loops; and measurement, estimation and identification of network time delay among the nodes can be omitted, the requirement for clock signal synchronization is lowered, influence of the random network time delay on the stability of the TITO-NDCS is reduced, and the control performance of the system is improved.

Description

technical field [0001] A method of IMC (Internal Model Control, IMC) and SPC (Smith Predictor Control, SPC) with random time delay of NDCS (Networked decoupling control systems, NDCS) with dual input and output, involving automatic control technology, network communication technology and computer technology cross field , especially relates to the technical field of multiple-input multiple-output network decoupling control systems with limited bandwidth resources. Background technique [0002] In a distributed control system, a closed-loop feedback control system composed of a real-time communication network between sensors and controllers, controllers and actuators is called Networked control systems (NCS). The typical structure of NCS is as follows: figure 1 shown. [0003] Compared with the traditional point-to-point structure control system, NCS has the advantages of low cost, easy information sharing, easy expansion and maintenance, and great flexibility. In recent year...

AI Technical Summary

Problems solved by technology

[0010] (2) The internal structure is much more complex than SISO-NCS

[0011] (3) There may be uncertain factors in the accused

[0012] In MIMO-NDCS, there are many parameters involved, and there are many connections between control loops, and the influence of parameter changes on the overall control effect will become very complicated.

[0013] (4) Failure of control components

Time delay leads to system performance degradation and even system instability, and also brings difficulties to the analysis and design of the control system

[0019] (3) It is unrealistic to fully synchronize the clock signals of all nodes in different distribution locations in MIMO-NDCS

[0020] (4) Since in MIMO-NCS, the input and output influence each other and there is a coupling effect, the internal structure of MIMO-NDCS is more complicated than that of MIMO-NCS and SISO-NCS, and there may be more uncertain factors. It is much more difficult to implement delay compensation and control than MIMO-NCS and SISO-NCS

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