Title :
Control of free length when coiling a helical spring
Author :
Readman, M.C. ; Muldoon, M.R. ; Reynolds, L. ; Morris, R. ; Bayliss, M. ; Wood, D. ; Stewart, I.
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK
fDate :
5/1/2001 12:00:00 AM
Abstract :
The problem of controlling the free-length of a helical spring while it is being manufactured on an automatic coiling machine is examined. This is a disturbance rejection problem, and the feedback system is designed to reject disturbances caused by variation of the wire properties and disturbances generated by the coiler. Fixed, self-tuning and fuzzy self-tuning control are used to reduce the variance of the coiled and free length of a helical spring. Friction feedforward is proposed to compensate for the varying coefficients of friction of different materials
Keywords :
adaptive control; capacitive sensors; compensation; feedback; feedforward; friction; fuzzy control; manufacturing processes; mechanical variables control; self-adjusting systems; spatial variables control; coefficients of friction; coiling; disturbance rejection problem; feedback system; fixed self-tuning; free length; friction feedforward; fuzzy self-tuning control; helical spring;
Journal_Title :
Control Theory and Applications, IEE Proceedings -
DOI :
10.1049/ip-cta:20010426
