방적

On-line control of the ratch setting on a drawframe

  • 출판일1997.02
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 170
A drawframe with an automatically controlled ratch setting was constructed which responded to variations in fibre length. The machine reacted to step changes in fibre length and settled into positions close to those recommended by the machine manufacturer for the particular fibres. An expert-system type of control was used. It involved integration of fast Fourier transforms over limited band widths and the use of progressive perturbations of the ratch with decisions being made using logic elements at each control cycle. The control cycles were reasonably rapid. The middle and back rolls were driven by setpping motors with electronic controls replacing the traditional gearing.
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