Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sliding-mode control method of buck-mode direct current converter based on unknown input observer

A DC converter, unknown input technology, applied in the field of step-down DC converter sliding mode control

Active Publication Date: 2019-06-07
ZHEJIANG UNIV OF TECH
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sliding mode control method based on an unknown input observer, which can effectively eliminate the disturbance problem caused by non-matching disturbance, so that the step-down DC converter system can output a stable power supply voltage, and solve the problem with non-matching The anti-disturbance stability problem of the step-down DC converter matching the disturbance, and effectively improving the robustness of the servo system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sliding-mode control method of buck-mode direct current converter based on unknown input observer
  • Sliding-mode control method of buck-mode direct current converter based on unknown input observer
  • Sliding-mode control method of buck-mode direct current converter based on unknown input observer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0108] The present invention will be further described below in conjunction with the accompanying drawings.

[0109] refer to figure 1 , the present invention provides a sliding mode control method with a non-matching disturbance step-down DC converter based on an unknown input observer, comprising the following steps:

[0110] Step 1. Establish a step-down DC converter system model with matching disturbance and non-matching disturbance, and initialize the system state and control parameters. The process is as follows:

[0111] 1.1, the average model of the step-down DC converter system with matching disturbance and non-matching disturbance can be expressed as the following form:

[0112]

[0113] Among them, v o is the output voltage, i L is the output inductor current, is the input voltage V in Nominal value, L 0 、C 0 , R 0 are the nominal values ​​of the inductance L, capacitance C and load resistance R respectively, u is the control input, and the non-matching ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a sliding-mode control method of a buck-mode direct current converter based on an unknown input observer. The method comprises the steps of: (1) establishing a buck-mode direct current converter system model with matching disturbance and non-matching disturbance, and initializing a system state and control parameters; (2) designing an unknown input observer used forestimating matching disturbance and non-matching disturbance included in a servo system to obtain estimated values of matching disturbance and non-matching disturbance, and verifying whether the estimated values can track an actual disturbance value or not; and (3) designing a sliding-mode controller according to the estimated values of the matching disturbance and the non-matching disturbance, and controlling the buck-mode direct current converter system t output a stable power supply voltage. The sliding-mode control method of the buck-mode direct current converter based on the unknown input observer can effectively eliminate the disturbance problem caused by non-matching disturbance, improves the robustness of the system to a certain extent, and allows the output voltage of the buck-mode direct current converter to be stabilized to a desired output voltage value.

Description

technical field [0001] The invention relates to the technical field of a step-down DC converter sliding mode control method, in particular to a step-down DC converter sliding mode control method with an unknown input observer with a non-matching disturbance. Background technique [0002] Modern electronic systems require reliable, efficient and high-quality power supplies. In order to obtain satisfactory control performance, the step-down DC converter needs to have good anti-interference ability, small steady-state error, low overshoot and fast dynamic performance. Aiming at how to effectively improve the performance of the system, a variety of control methods have been proposed at home and abroad, including adaptive control, robust control, sliding mode control, optimal control and fuzzy control. Among them, the sliding mode control has the advantages of simple algorithm, insensitivity to external disturbance and parameter perturbation, and fast response speed, so it has b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M1/00
Inventor 南余荣杨宇潘橹文陈强
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com