Two-input and two-output networked decoupling control system random network time delay IMC method

Abstract

The invention discloses a two-input and two-output networked decoupling control system random network time delay IMC method, and belongs to the MIMO-NDCS technology field having 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 network data transmission among all of the actual nodes of the TITO-NDCS to replace a network time delay compensation model is provided, and IMC is carried out on the two circuits, 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 random network time delay on the stability of the TITO-NDCS are reduced, and system control performance quality is improved.

Description

technical field [0001] A random network delay IMC (Internal Model Control, IMC) method for a two-input and two-output network decoupling control system, involving automatic control technology, network communication technology and computer technology, especially involving multiple-input multiple-output networks with limited bandwidth resources Decoupling control system technical field. Background technique [0002] The closed-loop feedback control system composed of real-time communication network is called networked control system (Networked control systems, NCS). The typical structure of NCS is as follows: figure 1 shown. [0003] In NCS, due to the introduction of the network, the complexity and cost of the control system are reduced, and many remote nodes (or devices) are organically combined through the network to cooperate to complete the work that a single node (or device) cannot complete. In addition, the information from different nodes can be integrated through th...

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Problems solved by technology

[0009] (2) The internal structure is much more complex than SISO-NCS

[0010] (3) There may be uncertain factors in the accused

[0011] 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.

[0012] (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

[0018] (3) It is unrealistic to fully synchronize the clock signals of all nodes in different distribution locations in MIMO-NDCS

[0019] (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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