Robustness of Systems with Unstructured Perturbations via Integral Liapunov Functions

Investigation on methods of robusutness estimation of nominally linear dynamic systems with unstructured uncertainties was performed. The algorithm proposed involves the consideration of a associated system, choice and subequent development of Liapunov function candidate and integration of their derivatives along the solution trajectory. The examples illustrate the method; better estimates of the bounds than those from traditional approach were obtained.