Introduction

The dynamic express analysis is preliminary dynamic calculation of hydraulic systems. At designing machine designer often needs to receive operatively by way of the first approach the information of qualitative character describing basic dynamic properties and characteristics of projected system of a hydraulic drive. It can be reached, using integrated, and therefore, the simplified mathematical models and methods of their analysis. Such program of the express analysis should possess, on the one hand, the certain degree of universality, i.e. to provide the analysis of a hydraulic drive of wider class, and on the other hand, to allow to receive quickly qualitative results of imitating simulation of dynamic processes. Besides presence of such device enables effectively to solve problems of parametrical optimization of a hydraulic drive (for dynamic models) by operative construction of set of possible trajectories (vectors of a condition) of the system.