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Modeling and control of a feed drive with multiple mechanically coupled ball screws
Author(s) -
Hsieh MinFu,
Yao WuSung,
Hsu ChunHao
Publication year - 2012
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.400
Subject(s) - ball screw , synchronization (alternating current) , control engineering , thrust , engineering , control system , injection molding machine , control theory (sociology) , ball (mathematics) , feed forward , machine tool , coupling (piping) , computer science , mechanical engineering , control (management) , topology (electrical circuits) , materials science , mathematics , mold , mathematical analysis , electrical engineering , artificial intelligence , nut , composite material
This paper presents the modeling and control of a single‐axis feed drive that is jointly driven by three ball screw/motor units. These ball screws are bridged by a mechanical coupling, via which a joint thrust can be produced from the three drive units for high‐power output ( e.g. , injection molding machines). Synchronous positioning of these drive units can also be applied to the handling of large workpieces. For such a coupled system, a mathematical model is first derived and constructed using a system identification technique developed in this paper. A control scheme based on the master–slave control is then designed to improve the system performance with the mechanical coupling. To ensure synchronization of the three drive units, a synchronous compensator is also designed using the genetic algorithm. Finally, the performance of the entire control system is experimentally verified. Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society