Proportional control, 1st-order stable plant: disturbance rejection, measurement noise, theory

Antonio Sala, UPV

Difficulty: *** ,       Relevance: ,      Duration: 19:21

*Enlace a Spanish version

Summary:

This video continues the analysis, based on the example process $G(s)=2∕(2s+1)$, of the theory underlying the behaviour of proportional control on stable 1st-order processes. The previous video [Pteo1EN] discussed setpoint tracking performance (analysis of $y=GK∕(1+GK)\cdot r$) and, in this video, we discuss input disturbance rejection (analysis of $y=G∕(1+GK)\cdot d_u$), both in dynamics (settling time) and steady-state deviation (final value, DC gain); last, we discuss measurement noise amplification on the manipulated variable (frequency-response analysis of $u=K∕(1+GK)\cdot n$), mostly at high frequencies.

*Link to my [ whole collection] of videos in English. Link to larger [ Colección completa] in Spanish.