a crack depth in mm, same as x â measurement system response, 1 – R– A(x) system model for evolving crack depth x A(n) linearised system model at measurement set n B(x) measurement model giving normalised energy ratio R– as a function of crack depth x B(n) linearised measurement model at measurement set n B(R) inverse measurement model giving crack depth x as a function of normalised energy rat...

Frequency-domain modeling is an effective technique in the dynamic analysis of power electronic converters-based systems. In this paper, a unified single-input single-output (SISO) loop gain for three-phase grid-tied voltage source converters (VSCs) under both symmetric and asymmetric AC grids presented, which facilitates physical measurement stability analysis. Based on linear-time-periodic (L...