CENG 443

Fall 2000

PART I: PROCESS REACTION CURVE

• Download the process reaction curve test data from the web site. Using this PRC, develop a first order plus time delay model for the 3 stirred tank process.
  
  
• Draw the block diagram for the feedback control system and place in each block the appropriate transfer functions.
  
  
• Compute the ultimate gain and ultimate period for this control system.
  
  
• Use the process model to design:
  • A feedback controller based on the Direct Synthesis method;
  • A feedback controller based on the IMC method;
  • PI and PID controllers based on ITAE performance index for load and setpoint changes;
  • PI and PID controllers based on the Ziegler-Nichols tuning relations;
  • PID controllers based on the modified Z-N settings with some overshoot and no overshoot.
    
    
• Write a SIMULINK program to compare the performance of these controllers for setpoint changes from 1.0 to 2.0 g/l using the IAE, ISE and ITAE indices.
  
  
• Find the controller design that minimizes the amount of off-spec product after a setpoint change.
  
  

Reminder on Honor Code Policy: "The students may talk to each other, the labbies or the instructor about any assignment in the course that is not specifically designated as pledged. This assistance is limited to the discussion of the problem. Consulting another student's solution (even from a previous class on the same subject) is prohibited, and submitted solutions may not be copied from any source."