Abstract
This paper deals with an on-line parameter estimation of continuous-time system with unknown order and input delay. The recursive running DFT (RRDFT) is employed to calculate instantaneous system gains at specified frequency points. System parameters besides input delay are recursively updated with respect both to the frequency points and their order by the proposed recursive algorithms. The input delay is easily estimated at the final procedure of the proposed estimation scheme. Two examples of the computer simulations are demonstrated to verify the proposed algorithms and estimation schemes.
