One-fourth period repetitive controller based on attractive rule

A repetitive controller and law of attraction technology, applied in adaptive control, general control system, control/regulation system, etc., can solve problems such as ineffective processing of symmetric signals, large memory usage, etc.

Active Publication Date: 2014-02-26
南京万枫电子科技有限公司
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the shortcomings of the existing full-cycle repetitive controllers and half-cycle repetitive controllers that cannot effectively process more complex symmetrical signals and consume a large amount

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
  • One-fourth period repetitive controller based on attractive rule
  • One-fourth period repetitive controller based on attractive rule
  • One-fourth period repetitive controller based on attractive rule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0188] A repetitive controller design with a sinusoidal reference signal, according to Figure 3aAs shown, the 1 / 4 cycle symmetry characteristic of the sinusoidal signal is formula (3), according to the symmetry characteristic of this signal, the repetitive controller can be designed as formula (6).

[0189] This embodiment controls the output waveform of the inverter. The inverter system used includes a given signal part, a 1 / 4 cycle repetition controller, a PWM modulation part, an inverter main circuit (including the LC filter circuit of the subsequent stage, etc.) and a detection circuit. Among them, the three parts of given signal, repeating controller and PWM modulation module are realized by DSP, and the rest are realized by hardware circuit. The entire system is given the expected signal to be output by DSP, which is equivalent to the input signal of the entire closed-loop system. After PWM modulation, it becomes a high and low pulse signal that can drive the switch t...

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 invention discloses a one-fourth period repetitive controller based on the attractive rule. The one-fourth period repetitive controller comprises a giving link, a one-fourth period feedback link, an e/v signal transformation module and a subtraction/addition ring. The giving link generates a reference signal provided with one-fourth period symmetry; the one-fourth period feedback link is constructed; the e/v signal transformation module is constructed in dependence on the attractive rule, an output signal of the e/v signal transformation module is applied to the correction of the repetitive controller; then an output signal of the repetitive controller is worked out and taken as an input of a controlled object. A specific controller parameter setting operation can be carried out according to indexes of convergence performance of a representation system, and a monotone decreasing area, an absolute attraction layer and a steady-state error band boundary of a representation trace error convergence process are provided. A closed-loop system can completely eliminate one-fourth period symmetric interference signals, and the accurate control of the closed-loop system is achieved. By means of the time domain design of the one-fourth period repetitive controller, symmetric signal interference is effectively restrained, the control precision is improved, and the occupied space of a memory is remarkably reduced.

Description

technical field [0001] The invention relates to repetitive control technology, in particular to a quarter-cycle repetitive controller suitable for inverters, and also suitable for periodic operation in industrial occasions. Background technique [0002] To design a repetitive controller according to the principle of internal model, it is necessary to put the generation polynomial of the periodic signal into the closed loop of the system to form a periodic delay feedback link. Regardless of the waveform of the input signal, as long as it repeats in the fundamental cycle, the output of the controller will accumulate the input signal cycle by cycle to completely suppress the periodic interference. Current repetitive control techniques focus on frequency domain design based on internal model principles. In order to achieve complete tracking / suppression with respect to the entire cycle of an external periodic signal, the internal model principle requires that the system contains...

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): G05B13/04
Inventor 孙明轩胡轶张杰邬玲伟毕宏博管海娃
Owner 南京万枫电子科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap