Title:
CONTROL METHOD FOR AUTOMATICALLY ADJUSTING INLET AND OUTLET SPEEDS OF COLD ROLLING PRODUCTION LINE
Document Type and Number:
WIPO Patent Application WO/2023/173673
Kind Code:
A1
Abstract:
A control method for automatically adjusting the inlet and outlet speeds of a cold rolling production line, comprising: first, converting a looper position into a strip steel position in a loop, then calculating in advance an acceleration fillet time compensation value and an acceleration direction change compensation value of the actual strip steel position; using a speed difference of the inlet and outlet of the loop as a positioning speed, optimizing a square root curve of the positioning speed; only monitoring a positioning starting point when the positioning speed is higher than a maximum allowable speed; calculating a set positioning speed using a positioning deviation and the positioning acceleration by means of a square root formula when the positioning deviation is in the square root curve section range; calculating the set positioning speed using the positioning deviation by means of a linearization formula when the positioning deviation is in the linearization section range; and controlling the positioning speed by means of a PI regulator when the positioning deviation is in an acceleration fillet smooth distance range. The present control method improves position control precision, ensures the smoothness and stability of inlet and outlet positioning speed, and improves production efficiency.
Inventors:
SONG JUN (CN)
Application Number:
PCT/CN2022/112407
Publication Date:
September 21, 2023
Filing Date:
August 15, 2022
Export Citation:
Assignee:
WISDRI ENGINEERING & RES INCORPORATION LIMITED (CN)
International Classes:
B21B37/00; B21B37/50
Foreign References:
| CN114749491A | 2022-07-15 | |||
| CN110743922A | 2020-02-04 | |||
| CN103350115A | 2013-10-16 | |||
| CN108188183A | 2018-06-22 | |||
| CN112077154A | 2020-12-15 | |||
| CN102553948A | 2012-07-11 | |||
| JPH0871627A | 1996-03-19 | |||
| JP2001179321A | 2001-07-03 | |||
| US5040395A | 1991-08-20 |
Attorney, Agent or Firm:
BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)
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