Two-input and two-output network decoupling control system non-deterministic time delay compensation method

Abstract

The invention relates to a two-input and two-output network decoupling control system non-deterministic time delay compensation method and belongs to the technical field of bandwidth resource limited MIMO-NDCSs (multi-input and multi-output network decoupling control systems). Since two-input signals and two-output signals affect and couple each other, a two-input and two-output network decoupling control system (TITO-NDCS) for decoupling processing is required; network delay of the transmission of network data between nodes not only affects the stability of respective closed-loop control loops, and but also affect the stability of the whole system, and even leads to the loss of the stability of the TITO-NDCS, and thus, a network data transmission process between all real nodes in the TITO-NDCS is adopted to substitute the compensation model of the network delay in the TITO-NDCS, and SPC (Smith Predictor Control) and IMC (Internal Model Control) are performed on the two loops, and therefore, measurement, estimation or identification of the network delay of the nodes can be eschewed, clock signal synchronization requirements can be lowered, influence on the stability of the TITO-NDCS caused by non-deterministic network delay can be reduced, and the control quality of the system can be improved.

Description

technical field [0001] The present invention relates to automatic control technology, the intersection field of network communication technology and computer technology, especially relates to the technical field of multiple-input multiple-output network decoupling control system with limited bandwidth resources. 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 the network to estimate, analyze and monitor the status of the network system...

AI Technical Summary

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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