Experimental physical parameter estimation of a thyristor driven DC-motor using the HMF-method

Abstract

This paper deals with the physical parameter estimation of the nonlinear continuous-time dynamics of a thyristor-driven dc-motor experimental set-up using the Hartley modulating functions (HMF) method. The approach applies a frequency-weighted leastsquares formulation to estimate the nonlinear continuous-time system parameters based on input-output data records over a finite time interval. The laboratory experimental set-up of the plant is facilitated by a computer-aided control system design software system, CADACS. The method has given satisfactory experimental results, and demonstrates its feasibility for use in parameter estimation of physically-based continuous-time systems. Due to its encouraging results, further studies will continue, in order to implement the methodology in the form of batch scheme recursive estimation for nonlinear continuous-time dynamics.