Fig. 4

Controlled states and estimation errors within \(\pm 3\sigma\) bounds (a) controlled state \({x}_{1}\), (b) controlled state \({x}_{2}\), (c) estimation error of \({x}_{1}\), (d) estimation error of \({x}_{2}\).

Controlled states and estimation errors within \(\pm 3\sigma\) bounds (a) controlled state \({x}_{1}\), (b) controlled state \({x}_{2}\), (c) estimation error of \({x}_{1}\), (d) estimation error of \({x}_{2}\).