Title:Mixed time-frequency domain simulation of a hydraulic inductance pipe with a check valveAuthor(s):Rudolf Scheidl, Bernhard Manhartsgruber, Helmut KoglerAbstract:This paper deals with the efficient computation of hydraulic switching systems with a check valve by a mixed time-frequency domain method; frequency domain modelling concerns wave propagation in a pipe, time domain modelling is applied to the switching valve and the check valve. The dual property of the check valve makes the complete problem to have variational inequality properties. A solution method is presented which replaces the pressure and the flow rate of the check valve as a function of one new variable. The resulting system of nonlinear algebraic equations is solved by a Newton method in combination with a smoothing of the non smooth properties of the check valve. The method is applied to a parameter study of a hydraulic buck converter.Journal:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering S.ISSN:2041-2983Page Reference:page 2413-2421, 9 page(s)Publishing:10/2011Volume:225Number:10