Made available in DSpace on 2018-12-11T16:41:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-08-01; This work concerns the application of certain non-linear phenomena - jump frequencies in a base-excited Duffing oscillator - to the estimation of the parameters of the system. First, approximate analytical expressions are derived for the relationships between the jump-up and jump-down frequencies, the d...