RT Journal Article
A1 D.W. Clarke

PB
T1 PI auto-tuning during a single transient
JN IEE Proceedings - Control Theory and Applications
VO 153
IS 6
SP 671
OP 683
AB A certain adaptive PI tuner operates by injecting variable-frequency sinewaves at the PI's set-point. Its initialisation requires: (a) a stable preliminary controller, (b) reasonable values (correct within a factor of about 3) of the first probing frequency ω0 and of the plant's gain |Gp(jω0)|, and (c) an effective choice of the adaptive gain Ka for rapid tuning. The challenge is to prime the parameters of both the PI and the adaptive algorithm during an open-loop starting transient, using data obtained before the output attains its set-point, and then to complete the tuning for a short period while under closed-loop control. A relevant parameter is Tm, the time for the plant's impulse response to attain its maximum (or equivalently the time for a maximum slope of the step-response s(t)), and a simple estimator of Tm is described. One of three generic plant models is adopted according to the relative position of Tm within the primary experimental time [T1...T2], and it is shown how initialisation depends on the chosen model. The described approach is shown to be effective for a range of plants.
K1 closed-loop control
K1 open-loop starting transient
K1 single transient
K1 adaptive PI tuner
K1 PI auto-tuning
K1 variable-frequency sinewaves
DO https://doi.org/10.1049/ip-cta:20050179
UL https://digital-library.theiet.org/;jsessionid=257icpcuoub9j.x-iet-live-01content/journals/10.1049/ip-cta_20050179
LA English
SN 1350-2379
YR 2006
OL EN