[직/편성물 염색] Applying a Fuzzy Gain-Scheduled PID Controller to Dyebath pH 출판일 : 2001.12.01 저자 : Chang-Chiun Huang, Wen-Hong Yu 서지사항 : Textile Research Journal, Volume 71, No 12(2001), 1074-1078 등록일 : 2012.11.13 I 조회수 : 93 작성자 : admin |
One of the factors critical to dyeing levelness in the textile industry is pH control, but it is a
difficult problem because of inherent nonlinearity and changing process dynamics. The
proportional integral derivative (PID) controller has been widely used in industry.
Conventional fixed gains are hard to achieve with dyebath pH control, since it is difficult to
model the process and the scheme is not adaptive to time-varying characteristics. Thus, a
fuzzy gain-scheduled PID controller is promising for dyebath pH control because of its self-
adaptation and robustness. The control scheme uses fuzzy rules and reasoning to autotune
PID gains without the need of modeling. A modification to overcome the difficulty in finding
the ranges of gains for stability is proposed. Simplified dyeing experiments demonstrate that
the proposed controller can track pH set values under the influence of temperature rise,
residual alkali, etc.
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