Friday 20 May 2011 Project Description
Subject: Viscosity control in polymer extrusion
Date and Location: 20 May 2011 10:00 - 11:30, 7th floor Conference Room, Ashby
Attendees: Kang Li, Minrui Fei, Xueqin Liu (Amy), Jing Deng, Chamil, Wanqing Zhao (Horace), Long Zhang (Will).
Message: None
Kang
- Chamil did some work on fuzzy control
- We will develop practical control package
- The problem in system identification of viscosity: limited measurement
- The main concentration is control
- reduce setting up time
- controller with less data
- Viscosity equation:
- $\eta = k \frac{\Delta P}{Q}$
- where $\eta$ denotes the viscosity,
- $\Delta P$ is the pressure drop at the die,
- and $Q$ is the through put.
- The challenge here includes
- How to measure $\Delta P$ and $Q$
- What's the relationship between $\Delta P$ and $Q$
- How to design experiment to collect data? and how many data points required for modelling or control?
- Fault diagnosis is used to monitor the control performance, and help to choose proper control strategy while the process condition changes.
- The plant is linear while the control output is nonlinear
- Have a look at wiener model (prof Bia's paper) and Hammerstein model
page revision: 2, last edited: 01 Jun 2011 10:12