Automation
Control
Technology

Continuous Automatic
Control
(CAC)

Lessons
Testing
Questions
P control of a P type process [Code: CAC 01]
P control of 1st, 2nd, 3rd and 4th order processes [Code: CAC 02]
I control of 2nd order and I type processes [Code: CAC 03]
P, PD, PI and PID control of a high order process: stability and optimization [Code: CAC 04]
P, PD, PI and PID control of a high order process: presetting of the parameters according to Ziegler-Nichols (dynamic method) [Code: CAC 05]
P, PD, PI and PID control of a high order process: presetting of the parameters according to Chien-Hrones-Reswick (static method) [Code: CAC 06]
P, PD, PI and PID control of a high order process: series and parallel configuration [Code: CAC 07]

 

  

After the experimental chapters where the characteristics and the typical behaviours of processes and controllers have been deeply analyzed, we open here a new chapter where processes and controllers are suitably combined to simulate and to study the most common problems related to the Continuous Automatic Control.

The analysis of the interactions between controllers and processes is complicated by the possible presence of noise; sometimes, the latter can trigger a series of oscillations with consequences, potentially serious, for the process.

In this chapter, in addition to the analysis of the interactions between controllers and processes, we will show the causes of the above mentioned instabilities, in order to study possible solutions.