| Abstract |
An approach to the dynamic emulation of
mechanical loads is presented and analyzed. It can be used for
the testing of variable speed and torque drives, where both,
linear and non-linear dynamics, can be applied. The
experimental system consists of the drive under test (drive
machine), which is mechanically connected to the active
loading system (load machine). The emulation procedure is
performed by the closed-loop calculation of the torque, applied
by the load machine, in such a manner that the input/output
behavior of the experimental system resembles the one of the
drive under test propelling the actual load. A feedback
compensation scheme is used, where the input is obtained from
the torque observer. The output (model speed) is calculated
from the numerical model of the emulated load. The method is
simple and requires no torque measurement equipment. Also
the influence of the nonlinear dynamics of the experimental
system is presented. The applied load machine (BLDC motor) is
assumed to be torque-controlled with high precision. An
induction motor is used as a drive machine. Algorithms are
developed with the use of Matlab/Simulink and experiments are
executed with the use of the dSPACE system. |
