Method for improving contour machining precision by using zero phase error tracking controller and disturbance observer

A zero-phase error and interference observation technology, applied in digital control, electrical program control, etc., can solve problems such as system non-modeling characteristics, system oscillation, and gain limitation

Inactive Publication Date: 2006-10-11
SHENYANG POLYTECHNIC UNIV
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional following control algorithm widens the frequency response bandwidth by increasing the gain, but it may lead to non-modeled characteristics of the excited system, and even system oscillation, so the increase in gain is limited

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
  • Method for improving contour machining precision by using zero phase error tracking controller and disturbance observer
  • Method for improving contour machining precision by using zero phase error tracking controller and disturbance observer
  • Method for improving contour machining precision by using zero phase error tracking controller and disturbance observer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0144] The present invention processes figure 2 Take the arc track shown as an example, set the system nominal object P n (s)=5 / (0.1s+1).

[0145] 1. Design of DOB

[0146] According to the set system nominal object, that is, the speed loop transfer function, the bandwidth of the third-order low-pass filter is continuously changed, as follows:

[0147] Q ( s ) = 3 τs + 1 ( τs ) 3 + 3 ( τs ) 2 + 3 τs + 1

[0148] Reasonably choose the value of τ, here, choose τ=1 / 260, the sampling...

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 relates to a method for improving the profile processing accuracy by zero phase error track control and disturb-detection. It comprises: a ZPETC, PD position controller, a DOB, and a controlled object. Wherein, the ZPETC is used to eliminate the error generated by the phase delay of close-loop system; the PD controller is used to improve the response character of position loop; DOB is used to eliminate the disturbance of system and make the transmit function of speed loop into reference mode; the controlled object is formed by a motor, a speed ring, and a current ring; the input signal of ZPETC is a position reference instruction; the output position signal processed by ZPETC is compared with the feedback position signal to be fed to PD position feedback controller; the input of PD controller is the speed preset signal; after comparing the speed preset signal and the output signal of DOB, the error is fed into controlled object; the output of controlled object is the actual output speed signal, via integrator, to be actual position signal.

Description

technical field [0001] The invention belongs to the field of numerical control machining technology and control, and in particular relates to a control method for improving contour machining accuracy by combining zero-phase error tracking control and disturbance observer. Background technique [0002] With the development of high-tech and aerospace engineering, computer equipment, and high-precision products of optical engineering, the precision of parts is getting higher and higher. At present, the precision of ultra-precision machining is moving from sub-micron to nano-level. At the same time, the use of high-efficiency processing methods has become an urgent requirement of today's manufacturing industry. With the cooperation of cutting tools and other related technologies, cutting machine tools for high-speed and high-precision processing have emerged, mainly various types of machining centers and various CNC machine tools. Today's so-called high-speed and high-precision ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
Inventor 赵希梅郭庆鼎
Owner SHENYANG POLYTECHNIC UNIV
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