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

Abstract

The invention discloses a two-input and two-output networked decoupling control system large 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 two-freedom degree IMC and one-freedom degree are carried out on the two closed loop control 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 network time delay on the stability of the TITO-NDCS are reduced, and system control performance quality is improved.

Description

technical field [0001] An IMC (Internal Model Control, IMC) method for a large network delay in a two-input and two-output network decoupling control system, which involves the intersection of automatic control technology, network communication technology and computer technology, especially involving multiple input and multiple output with limited bandwidth resources The technical field of network decoupling control system. Background technique [0002] A closed-loop feedback control system composed of a real-time communication network is called a networked control system (Networked control systems, NCS). NCS is a distributed control system integrating communication network and control system. It also has the functions of signal processing, optimal decision-making and control operation. The typical structure of NCS is as follows: figure 1 shown. [0003] Compared with the traditional point-to-point direct control system, the biggest feature of NCS is that the sensors, cont...

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Problems solved by technology

[0011] (2) The internal structure is much more complex than SISO-NCS

[0012] (3) There may be uncertain factors in the accused

[0013] 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.

[0014] (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

[0020] (3) It is unrealistic to fully synchronize the clock signals of all nodes in different distribution locations in MIMO-NDCS

[0021] (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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