Mathematical simulation of various modern technical systems of the certain class (mechanical, hydraulic, electric, etc.) is connected with construction of the models providing the formalized description of any such system of arbitrary structure.
For construction of formal dynamic model of a hydro mechanical drive as a whole the method based on representation of system in the form of final
As such base elements in hydro mechanical drives can be:
Then the structure of any arbitrary transfer can be described by means of identification of elements, numbering of nodes (points of connection of elements in the scheme by a principle an
Feature of simulation of such transfers is presence of two basic modes of movement:
1) the
2) the
For each of these modes of movement the moment realized by clutch, is defined differently, and in the time moment of blocking a jump of acceleration takes place and clutch blocking conditions depend on the scheme structure, distribution of external moments and reduced moments of inertia, and also a mode of rotation of others clutches rigid connected with given clutch. All this in a whole represents the certain difficulties for analysis of similar transfers as constant checking of blocking conditions during their simulation is required with respective alteration of the realized by clutches. Thus, for simulation of dynamic processes in mechanical and hydro mechanical transfers of arbitrary structure the following instruments are necessary: – an algorithm of the structural description of the drive arbitrary schemes; – a library of base elements and their mathematical models; – an ordering of input data, and a way of their forming and preparation; – an algorithm of automatic forming of the system of equations describing mechanical or hydro mechanical drive of arbitrary structure as a whole; – a method of solution of the generated system of equations; – a program realization of dynamic calculation for arbitrary schemes; – a way of representation and analysis of received results. The program analyzes the input information and depending on set of elements and structures of investigated transfer chooses from library of base elements and their mathematical models the necessary equations, forming the general mathematical model of system and solving it at the given external influences. |

Contents
>> Engineering Mathematics
>> Hydro Mechanical Drives and Transmissions
>> Dynamic Analysis
>> Introduction