Figure 3

Estimation of master and slave system parameters: (a) \(\xi _{11} (t)\), \(\xi _{12} (t)\), \(\xi _{13} (t)\), \(\xi _{21} (t)\), \(\xi _{22} (t)\), \(\xi _{23} (t)\) and (b) \(\xi _{11} (t)\), \(\xi _{12} (t)\), \(\xi _{13} (t)\), \(\xi _{31} (t)\), \(\xi _{32} (t)\), \(\xi _{33} (t)\)