The influence of parameters and structure of PI-type fuzzy-logic controller on DC drive system dynamics
The paper presents an analysis of the dynamical properties of the DC drive system with a fuzzy-logic speed controller in the presence of a wide-range changes of the drive system inertia. The influence of PI-type fuzzy controller parameters (scaling factors) and structure (membership functions location and shape) on the dynamics of speed control loop was tested in the presence of disturbances caused by the inertia load torque changes. The possibilities of this disturbance compensation using the on-line tuning of a chosen controller scaling factor or the modification of its membership function's shape were analysed. Drive system responses for both proposed strategies were illustrated by simulation results. These approaches have ensured the desired dynamics of the drive system operation for the wide range of disturbances caused by the drive system inertia changes. (C) 2002 Elsevier Science B.V. All rights reserved.
dc drive system speed controller fuzzy control scaling factor membership functions motion control