Abstract
In this paper, He's Variational Iteration Method (HVIM) is used to study the nonlinear time- invariant and time-varying singular systems. The results obtained using He's Variational Iteration Method and the methods taken from the literature (18) were compared with the exact solutions of the nonlinear time- invariant and time-varying singular systems. It is found that the solution obtained using the He's Variational Iteration Method is closer to the exact solutions of the nonlinear time-invariant and time-varying singular systems. Error Calculations for discrete and exact solutions are presented in a table form to highlight the efficiency of this method.
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