“…The UKF is more accurate than the EKF when applied to nonlinear systems (Canelon et al, 2007; Grewal and Andrews, 2011; Houshangi and Azizi, 2005), however, in systems with high dimensions, due to the increase of the computation complexity, the filter convergence would be extremely slow. Moreover, to achieve a proper estimation, the tuning parameters of the UKF should be accurately adjusted.…”