This paper proposes two model reference adaptive PF (PDF) spee
d control methods for
servo drives. Following from the structure (PF-type) of model r
eference parameter adaptive control
was developed to provide constant loop gain in speed control lo
op with changing gain (moment of
inertia and/or torque factor) it makes it easier to reach overs
hootless as well as fast speed changing
compensation caused by jump in load. The algorithm even keeps i
ts stability at fast changing, jump-
like load torque. Model reference signal adaptive control is us
ed to provide constant loop gain in
speed control loop with changing parameters exposed to a signif
icant load. The approaching block
diagram of the adaptive control
can be seen as an extended vers
ion of the PF controller, so one of the
adaptation factors (which is the free parameter of the adaptive
control) is given. Both model
reference adaptive controls dra
wn up can be easily implemented
because the adaptation algorithms
do not need acceleration measuring
(thanks to the first-order m
odel). Simulation and experimental
results demonstrate that the proposed methods are promising too
ls to speed control of electrical
drives