This paper proposes two model reference adaptive PF (PDF)
speed control methods for servo drives. Following from the
structure (PF‐type) of model reference parameter adaptive
control was developed to provide constant loop gain in
speed control loop with changing gain (moment of inertia
and/or torque factor) which makes it easier to reach
nonovershooting step response as well as fast speed
changing compensation caused by jump in load. The
algorithm even keeps its stability at fast changing, jump‐like
load torque. Model reference signal adaptive control is used
to provide constant loop gain in speed control loop with
changing parameters exposed to a significant load. The block
diagram of the adaptive control can be seen as an extended
version 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 drawn up can be
easily implemented because the adaptation algorithms do
not need acceleration measuring (thanks to the first‐order
model). Simulation and experimental results demonstrate
that the proposed methods are promising tools for speed
control of electrical drives