TITO-NDCS random network delay SPC and IMC method

Abstract

The invention provides a TITO-NDCS random network delay SPC and IMC method, and belongs to the technical field of bandwidth resource limited MIMO-NDCS. Aiming at the problems of loss of stability of TITO-NDCS and influencing the stability of each closed control loop and influencing the stability of the whole system due to network delay generated by transmission of network data between nodes in the TITO-NDCS in which TITO signals are mutually influenced and coupled and require to be decoupled, the method that the network data transmission process between all the real nodes in the TITO-NDCS replaces a network delay compensation model is put forward, and SPC and IMC are performed on the two loops respectively. With application of the method, measurement, estimation or identification of the network delay between the nodes can be omitted, the synchronization requirement of node clock signals can be omitted, the influence of the network delay on the stability of the TITO-NDCS can be reduced and the system control performance quality can be improved.

Description

technical field [0001] A TITO (Two-input and two-output, TITO)-NDCS (Networked decoupling control systems, NDCS) random delay SPC (Smith Predictor Control, SPC) and IMC (InternalModel Control, IMC) method, involving automatic control technology, The intersection of network communication technology and computer technology, especially the technical field of decoupling control system with multiple input and multiple output network 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 years,...

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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