Discrete-Time PID ControllerSnapshot of the front panel of the simulator:
Description of the simulated systemTypically, commercial PID controllers of today are implemented as an algorithm running on a computer. The PID algorithm is executed once per time step (sampling interval), Ts. A typical value of Ts is 0.1 sec. The tasks below deomonstrates effects of the discrete-time nature of such computer implemented controllers. TasksAssuming the following parametrers of the process to be controlled (these values are default values of the simulator): Ku=1, Kv=1, T1=2, T2=1, tau=0.5. Controller tuning using the Ziegler-Nichols' ultimate gain tuning method yields Kp=3.6, Ti=2.0 og Td=0.5 You can apply the above parameter values in the following task. Start the simulator.
Updated 18. January 2008. Developed by Finn Haugen. E-mail: finn@techteach.no. |