In-line viscosity control in an extrusion process with a fuzzy gain scheduled PID controller
✍ Scribed by Shih-Hsuan Chiu; Sheng-Hong Pong
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 357 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
In the extrusion process, rapidly tracking the set point of quality factor and eliminating its variation to reduce the off-specification product is important. In this study, the fuzzy gain-scheduled proportional-integral-derivative (PID) controller is used to control the melt viscosity during extrusion processing. A second-order model related to the viscosity and the extruder screw speed is developed empirically to approximate the extrusion system. It is concluded that, in comparison to the wellknown Zeigler-Nichols PID tuning control scheme, the performances of the proposed control strategy is preferable both in simulation and implementation.