Voice coil motor driven Lorenz force type fast tool servo (FTS) repeated sliding mode composite control method

A Lorentz force type, voice coil motor technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of lack of tracking, inability to completely determine the mathematical model, slow change of characteristic parameters, etc. Achieve high-precision tracking and suppression

Active Publication Date: 2019-07-23
SHENYANG POLYTECHNIC UNIV
View PDF31 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adaptive control, its algorithm can reduce or eliminate the slow change of characteristic parameters brought by the controlled object and the influence of external disturbance on the servo system, but adaptive control is very dependent on the controlled object, there are many unknown and uncertain factors, cannot Fully determine its mathematical model
Repeated control can solve the internal stability of the system, but it has output delay, poor dynamic response performance, and no good tracking
Sliding mode control has strong robustness, but chattering phenomenon will occur in the control process

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
  • Voice coil motor driven Lorenz force type fast tool servo (FTS) repeated sliding mode composite control method
  • Voice coil motor driven Lorenz force type fast tool servo (FTS) repeated sliding mode composite control method
  • Voice coil motor driven Lorenz force type fast tool servo (FTS) repeated sliding mode composite control method

Examples

Experimental program
Comparison scheme
Effect test

example

[0531] The selected motor is a voice coil linear motor, and the specific parameters are: magnetic induction intensity B=484.40T, total coil length l=266mm, resistance R=3.6Ω, total mass of the voice coil linear motor mover m=280g, damping coefficient c= 0.045N·s·m -1 , spring constant k 1 =5720 N / m.

[0532] Agent-based sliding mode control parameters: k p =50,k i =0.03,k d =0.0019, V=1, β=0.00001.

[0533] Improved repetition control parameter: ω q =99rad / s, T=0.001,τ b =0.00093,k p1 =200,k d1 = 0.1.

[0534] The sampling time of this patent is 1ms, and the limit value of the saturation function is S L =±0.5.

[0535] When the input is given as x i =0.001sin(300πt)m, the input and output curves are as follows Figure 21 As shown, the curve in the figure reflects that the control algorithm involved above has good tracking performance, and the system output can well realize high-precision tracking of a given input signal. When the system runs to 0.03s, adding 5N...

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 provides a voice coil motor driven Lorenz force type fast tool servo (FTS) repeated sliding mode composite control method. The voice coil motor driven Lorenz force type FTS repeated sliding mode composite control method comprises the following steps that (1) an agency travel sliding mode control law is designed by utilizing the relationship among the input position, the agency travelposition and the output position; (2) a PID controller is designed through the relationship between the agency travel position and the output position, and thus PID controller output of virtual connection is obtained; (3) according to the agency motion trajectory, an algebraic relation between the 'agency travel sliding mode control law' in the step (1) and the 'PID controller output of virtual connection' in the step (2) is obtained, and then sliding mode controller output based on an agency is obtained; and repeat control is improved, specifically, the error between a system input given position signal and the output position is utilized as an input signal of a repetitive controller, and the input signal is embedded into a system to realize high-precision tracking and suppression of periodic signals and interference. According to the voice coil motor driven Lorenz force type FTS repeated sliding mode composite control method, the steady-state tracking precision of the system can beimproved.

Description

[0001] ·Technical field [0002] The invention belongs to the technical field of numerical control processing, and in particular relates to the research on the control strategy based on the combination of repeated sliding modes of the Lorentz force type fast tool servo system. Background technique [0003] In recent years, in the fields of power electronics, aerospace, military and other fields, the requirements for machining accuracy of parts are getting higher and higher, especially for non-axisymmetric and non-rotating optical free-form surface parts. The efficiency of traditional lathe processing is low, and the processing accuracy is difficult to meet the requirements of the product. In order to solve this problem, diamond ultra-precision turning is introduced. Its core technology lies in the fast tool servo system, which is a processing method to achieve high precision and high efficiency on the surface of the microstructure of the part, and also to compensate for the mo...

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): G05B13/04
CPCG05B13/042
Inventor 刘春芳徐燕孙宜标
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