Using the Best Linear Approximation With Varying Excitation Signals for Nonlinear System Characterization

Block-oriented model structure detection is quite desirable since it helps to imagine the system with real physical elements. In this paper, we explore experimental methods to detect the internal structure of the system, using a black box approach. Two different strategies are compared and the best combination of these is introduced. The methods are applied on two real systems with a static nonlinear block in the feedback path. The main goal is to excite the system in a way that reduces the total distortion in the measured frequency response functions to have more precise measurements and more reliable decision about the structure of the system.

Jaar van publicatie:2016

Trefwoorden:Charge coupled devices, Correlation, Distortion, distortion measurement, Frequency measurement, Gaussian process, Linear approximation, Best linear approximation (BLA), Bussgang's theorem, NL feedback, NL systems, Central composite design (CCD), nonlinear (NL) distortion, optimal input design, structure detection

Auteurs:International