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Super-distortion control-based DC-DC converter chaotic control method and system, and medium

A DC-DC, chaotic control technology, applied in the control/regulation system, the output power conversion device, the conversion of DC power input to DC power output, etc., to achieve low voltage ripple, strong robustness, and elimination of chaotic phenomena. Effect

Active Publication Date: 2019-05-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional control theory can no longer meet the increasing control performance requirements. Therefore, on the basis of chaos theory, the corresponding nonlinear control strategy is studied, and the Boost converter in the chaotic state is stabilized in the single-period state. The performance of the device is of great significance

Method used

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  • Super-distortion control-based DC-DC converter chaotic control method and system, and medium
  • Super-distortion control-based DC-DC converter chaotic control method and system, and medium
  • Super-distortion control-based DC-DC converter chaotic control method and system, and medium

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Experimental program
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Effect test

Embodiment 1

[0094] Embodiment one, as figure 1 As shown, a DC-DC converter chaos control method based on super twist control, including the following steps:

[0095] S1: Mathematically modeling the DC-DC converter to obtain a chaotic model of the state variables of the DC-DC converter;

[0096] S2: Obtain the chaotic energy storage value in the chaotic state in the chaotic model, obtain the energy storage constant value in the steady state in the chaotic model according to the chaotic energy storage value, and obtain the energy storage constant value in the chaotic model according to the chaotic energy storage value and the The energy storage constant value determines the error variable;

[0097] S3: Based on the super twist control method, obtain an estimated error amount according to the error variable, and design an equivalent sliding mode controller according to the error variable and the estimated error amount, and obtain the equivalent sliding mode controller control signal;

[0...

Embodiment 2

[0161] Embodiment two, such as Figure 12 As shown, a DC-DC converter chaos control system based on super twist control, including modeling module, sampling module, processing module and control module;

[0162] The modeling module is used to mathematically model the DC-DC converter to obtain a chaotic model of the state variables of the DC-DC converter;

[0163] The sampling module is used to obtain the chaotic energy storage value in the chaotic state in the chaotic model;

[0164] The processing module is used to obtain the energy storage constant value in the chaotic model at steady state according to the chaotic energy storage value, and determine the error variable according to the chaotic energy storage value and the energy storage constant value. The energy storage value and the energy storage constant value determine the error variable, and are also used to obtain an estimated error amount according to the error variable based on the super twist control method, and d...

Embodiment 3

[0167] Embodiment 3. Based on Embodiment 1 and Embodiment 2, this embodiment also discloses a DC-DC converter chaos control system based on super-twist control, including a processor, a memory, and an operable A computer program on the processor, when the computer program runs, the figure 1 The following steps are shown:

[0168] S1: Mathematically modeling the DC-DC converter to obtain a chaotic model of the state variables of the DC-DC converter;

[0169] S2: Obtain the chaotic energy storage value in the chaotic state in the chaotic model, obtain the energy storage constant value in the steady state according to the chaotic energy storage value, and determine according to the chaotic energy storage value and the energy storage constant value error variable;

[0170] S3: Based on the super twist control method, obtain an estimated error amount according to the error variable, and design an equivalent sliding mode controller according to the error variable and the estimated e...

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Abstract

The invention relates to a super-distortion control-based DC-DC converter chaotic control method and system, and medium. The method comprises steps of performing mathematical modeling on a DC-DC converter, so as to obtain a chaotic model of a state variable of the DC-DC converter; acquiring a chaotic energy storage value in a chaotic state in the chaotic model, acquiring an energy storage constantvalue in a stable state in the chaotic model according to the chaotic energy storage value, and determining an error variable according to the chaotic energy storage value and the energy storage constant value; based on a super-distortion control method, acquiring an estimated error amount according to the error variable, designing an equivalent sliding mode controller according to the error variable and the estimated error amount, so as to obtain a control signal of the equivalent sliding mode controller; and controlling the DC-DC converter according to the control signal. The method can effectively control the DC-DC converter in the chaotic state to run in a 1- periodic state orbit, so that chaotic phenomenon is eliminated effectively, the DC-DC converter responds dynamically faster, has stronger robustness, and has lower voltage ripples.

Description

technical field [0001] The invention relates to the technical field of power electronics and chaos control, in particular to a method, system and medium for controlling chaos of a DC-DC converter based on super-twist control. Background technique [0002] With the continuous development of science and technology, the role of DC-DC power converters has become increasingly significant and has been widely used. In the practical application of power electronic systems, people often find some "abnormal" phenomena. For example: in the DC-DC converter, the sub-harmonic components of the control frequency appear in the voltage and current waveforms, and obviously show irregular and non-periodic motions, resulting in a decrease in the accuracy and stability of the system and accompanied by harsh electromagnetic noise. Research in the past two decades has shown that this behavior of power electronic systems cannot be simply considered to be caused by reasons such as poor circuit cont...

Claims

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Application Information

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IPC IPC(8): H02M3/00H02M3/156H02M3/157
Inventor 李自成阮梦雄王后能曾丽熊涛
Owner WUHAN INSTITUTE OF TECHNOLOGY
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