On-line physical parameter estimation by using model reference adaptive control method based on the modified delta form

This paper concerns about system identification. The conventional identification algorithm based on the shift operator or the z-transform lacks a physical meaning. Thus, we propose the method that estimates directly physical parameters by unifying the model reference adaptive control with the delta form. This proposed method exchanges the model and the actual plant in the conventional model reference adaptive control and adopts the normalized delta form for introducing design parameters. The effectiveness of the proposed method is also shown. Since the proposed method is simple and the amount of the calculation is low, physical parameter estimating is performed in real-time.