Double-input and double-output NDCS unknown time delay hybrid control method

A dual-input, dual-output, time-delay technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as complex influence, complex internal structure, failure of control components, etc.

Inactive Publication Date: 2017-08-18
HAINAN UNIVERSITY
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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 analysi

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  • Double-input and double-output NDCS unknown time delay hybrid control method
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[0150] The following will refer to the attached Figure 6 Exemplary embodiments of the present invention are described in detail to make the above-mentioned features and advantages of the present invention more apparent to those skilled in the art.

[0151] The specific implementation steps are as follows:

[0152] For closed loop control loop 1:

[0153] Step 1: The sensor S1 node works in the time-driven mode, when the sensor S1 node is cycled for h 1 After the sampling signal of is triggered, the controlled object G 11 (s) output signal y 11 (s) and the controlled object cross-channel transfer function G 12 (s) output signal y 12 (s), and the output signal y of the A1 node of the actuator 11mb (s) Sampling and calculating the system output signal y of the closed-loop control loop 1 1 (s) and the feedback signal y 1b (s), and y 1 (s)=y 11 (s)+y 12 (s) and y 1b (s)=y 1 (s)-y 11mb (s);

[0154] Step 2: The sensor S1 node will feed back the signal y 1b (s), tran...

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Abstract

A double-input and double-output NDCS unknown time delay hybrid control method belongs to the technical field of a multiple-input and multiple-output NDCS having a limited bandwidth resource. A method using a real network data transmission process between all nodes in a TITO-NDCS to replace a network time delay compensation model between the nodes is brought forward aiming at the problems that, for the TITO-NDCS double input signals and double output signals of which are influenced and coupled with each other and which needs decoupling processing, stability of each closed-loop control circuit is influenced, stability of the whole system is influenced and that even loss of stability of the TITO-NDCS is resulted in due to network time delay of network data during transmission between the nodes. SPC and IMC are separately applied to a circuit of the TITO-NDCS. Measurement, estimation or identification of the network time delay between the nodes can be avoided, a clock signal synchronization requirement is reduced, an influence of a network uncertain time delay on TITO-NDCS stability is lowered, and the control performance quality of the system is improved.

Description

technical field [0001] A hybrid control method with unknown delay of double-input and double-output NDCS (Networked decoupling control systems, NDCS), which involves automatic control technology, network communication technology and computer technology cross-fields, especially involving multiple-input multiple-output network decoupling with limited bandwidth resources control system technology 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 injects new vitality into classic and modern control theory, and also poses new challenges to its system design: on the ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 杜锋
Owner HAINAN UNIVERSITY
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