“…Robot localization is also a partially observable problem (Vidal-Calleja, Andrade-Cetto, & Sanfeliu, 2004); and even though we can control the initial input, the output is still unpredictable. Hence, this problem is more difficult in a nonlinear system than in a linear system (Censi, 2008;Jun et al, 2012;Mo & Sinopoli, 2008;Plarre & Bullo, 2009;Sinopoli et al, 2004).…”