Two-input two-output NDCS time-varying delay compensation and control method

Abstract

The invention provides a two-input two-output NDCS time-varying delay compensation and control method and belongs to the technical field of multi-input multi-output NDCS with limited bandwidth resources. By aiming at influences and coupling between two-input and two-output signals, decoupling processing of TITO-NDCS is required, and because of the network time delay generated by transmission of network data among nodes, stabilities of various closed-loop control circuits are affected, and stability of a whole system is affected, and then the problem of the loss of the stability of the TITO-NDCS can be even caused. The method of using the process of the actual network data transmission among all the nodes of the TITO-NDCS to replace a network time delay compensation model is provided, and two-freedom-of-degree IMC and SPC are carried out on the loop, and therefore the measurement, the estimation, or the identification of the network time delay among the nodes are eliminated, a requirement on synchronization of node clock signals is lowered, the influences of the network time-varying delay on the stability of the TITO-NDCS are reduced, and system control performance quality is improved.

Description

technical field [0001] A two-input and two-output NDCS (Networked decoupling control systems, NDCS) time-varying delay compensation and control method, related to automatic control technology, network communication technology and computer technology, especially related to multi-input multi-output network solutions with limited bandwidth resources Coupling control system technical field. Background technique [0002] With the development of network communication, computer and control technology, and the increasingly large-scale, wide-area, complex and networked development of production process control, more and more network technologies are applied to control systems. Networked control systems (NCS) refer to network-based real-time closed-loop feedback control systems. The typical structure of NCS is as follows: figure 1 shown. [0003] NCS can realize complex large-scale systems and remote control, node resource sharing, and increase system flexibility and reliability. f...

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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