Аннотации:
This paper presents a nonlinear optimal speed
controller based on a state-dependent Riccati equation (SDRE)
for permanent magnet synchronous motor (PMSM). An SDREbased
near optimal load torque observer is also proposed to
provide the load torque information for the controller. In both
designs, the stability is analytically proven and Taylor series
method is used to find an approximate solution because the
SDRE cannot be directly solved. The SDRE-based optimal
controller and observer can ensure better control performance
such as no overshoot and fast transient response in speed
tracking than the linear conventional controllers such as LQ
regulator and PI controller even under the variations of the
model parameters and load torque. The proposed SDRE-based
control strategy is implemented on a PMSM testbed using
TMS320F28335 DSP. The simulation and experimental results
are given to prove the feasibility of the proposed control scheme