Deminars

Greg McMillan Recorded Deminars

Deminar#1 – PID Enhancement for Sampled Measurements
Date: April 7, 2010
Session Length: 65 minutes
Topic: How to Eliminate Oscillations from Analyzers and Wireless Measurements with a PID Enhancement
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Demo of Base Case
  • Demo of Sample Time Effect
  • Demo of Sensitivity Effect

 

 

Deminar#2 – PID Control of Valve Sticktion and Backlash
Date: April 21, 2010
Session Length: 74 minutes
Topic: How to Eliminate Continual Oscillations with the “Integral Deadband” PID option
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show access to cascade loop lab setup and how to make load upsets to see PID response
  • Compare base case to scenario with 5% stick-slip on response of secondary PID in AUTO mode
  • Compare slow versus fast tuning effect on Secondary PID AUTO Mode Response to 5% Stick-Slip
  • See the effect of secondary PID I-deadband on limit cycle in PID AUTO mode for 5% stick-slip
  • See the effect of secondary PID I-deadband on limit cycle in PID CAS mode for 5% stick-slip
  • See effect of I-deadband in both primary and secondary on PID CAS mode for 5% stick-slip
  • See effect of valve deadband on CAS Mode with no I-deadband in either PID for 5% valve deadband
  • See effect of valve deadband on AUTO Mode Response with no I-deadband in either PID
  • See effect of valve deadband on AUTO Mode response of high gain PID for an Integrating process
  • See effect of valve deadband on AUTO Mode response of low gain PID for an integrating process

 

 

Deminar#3 – PID Control of Slow Valves and Secondary Loops
Date: May 12, 2010
Session Length: 90 minutes
Topic: How to Eliminate Bursts of Oscillations with the “Dynamic Reset Limit” PID option
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show access to cascade loop lab setup and how to make load upsets to see response for fast valve
  • Show response of secondary PID to slow valve for small and large upsets
  • Show response of secondary PID with Dynamic Reset Limit to slow valve
  • Show response of self-regulating primary PID to slow secondary loop for small and large upsets
  • Show response of self-regulating primary PID with Dynamic Reset Limit to slow secondary loop
  • Show response of integrating primary PID to fast secondary loop for small and large upsets
  • Show response of integrating primary PID to slow secondary loop for small and large upsets
  • Show response of integrating primary PID with Dynamic Reset Limit to slow secondary loop

 

 

Deminar#4 – Online Process Control Lab – Access and Use
Date: May 27, 2010
Session Length: 60 minutes
Topic: How to Use Free Online Process Control Labs for Fun and Profit and Become Famous by Friday or at Least Saturday
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show access to ProcessControlLab.com web site and virtual plant

 

 

Deminar#5 – PID Tuning for Self-Regulating Processes
Date: June 9, 2010
Session Length: 1 hour
Topic: How to Compensate for Nonlinearities in Flow and Liquid Pressure Loops
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show adaptive control of fast nonlinear self-regulating processes (Liquid Flow and Liquid Pressure)

 

 

Deminar#6 – PID Tuning for Near-Integrating Processes
Date: June 23, 2010
Session Length: 53 minutes
Topic: How to Reduce the Tuning Time for Column and Vessel Temperature and Pressure Loops by 90%
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show how to reduce tuning time for near integrating processes for single slow self-regulating loop

 

 

Deminar#7 – PID Control of True Integrating Processes
Date: August 11, 2010
Session Length: 62 minutes
Topic: How to Reduce the Batch Cycle Time for Temperature and pH Loops by 25%
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show slow setpoint response from just integral action
  • Show faster setpoint response from addition of kick from proportional mode and bump derivative mode
  • Show how to reduce batch cycle time by use of setpoint feedforward
  • Show how to reduce batch and startup time by a full throttle setpoint response (bang-bang control)

 

 

Deminar#8 – PID Control of Runaway Processes
Date: August 25, 2010
Session Length: 65 minutes
Topic: How to Improve the Performance of Exothermic Reactor Temperature Loops
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show how runaway response initially looks like an integrating but then accelerates
  • Show performance of modified short cut method for runaway and start ultimate oscillation
  • Show how Ziegler-Nichols tuning settings are modified for runaway
  • Show increase in ultimate period due to fouling of heat transfer surface
  • See extreme effect on secondary lag on ultimate period of runaway process
  • Show effect of controller gain below low gain limit

 

 

Deminar#9 – Process Control Improvement Primer
Date: September 8, 2010
Session Length: 63 minutes
Topic: The “WHAT” and “WHY” needed to improve 90% of the loops. This seminar attempts to provide a unified approach to understanding the impact of the PID, final control element, process, disturbance, and measurement on loop performance
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Impact of Fast and Slow Disturbances

 

 

Deminar#10 – PID Deadtime Compensation
Date: October 13, 2010
Session Length: 65 minutes
Topic: Deadtime Compensation Myth Buster
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show improvement in loop performance by deadtime compensation and sensitivity to deadtime estimate for loop dominated by process lag
  • Show improvement in loop performance by deadtime compensation and sensitivity to deadtime estimate for loop dominated by process delay

 

 

Deminar#11 – Feedforward Control
Date: January 5, 2011
Session Length: 63 minutes
Topic: How to Setup and Adjust the Dynamic Compensation of Feedforward Signals
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show the upset without feedforward
  • Show effect of a feedforward correction arriving right on time
  • Show effect of a feedforward correction arriving too late
  • Show effect of a feedforward correction arriving too early
  • Show effect of a feedforward correction arriving too early with wireless measurement and traditional PID
  • Show effect of a feedforward correction arriving too early with wireless measurement and enhanced PID (PIDPlus)

 

 

Deminar#12 – Split Range Control
Date: March 9, 2011
Session Length: 60 minutes
Topic: Major PID split range applications, problems, and innovative solutions including the use of PIDPlus
Access: Recorded Event, Slides, Greg’s Summary Review
Process Control Lab Exercises:

  • Show effect of the standard split range point
  • Show effect of the smart split range point
  • Show effect of standard PID for stiction at split range point

 

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