UM PHEUMATIC SYSTEMS | PAVIATH INTEGRATED SOLUTION

UM Pneumatic Systems

Simulation of multibody systems with pneumatic elements

Simulation of multibody systems with pneumatic elements

Program package Universal Mechanism includes a specialized module UM Pneumatic Systems, which contains tools for simulation of models with pneumatic elements. The following elements are available in the current version of the module:

Air springs
Rigid chambers
Pneumatic lines
Orifices

Air springs (AS)

The following AS models are available:
Tabular model: the description of force element includes tabular experimental data on force and volume
Nishimura model
Berg model
Thermodynamic model

Manufacturers often supply information about AS properties in the form of a static data charts, which include load/height and volume/height diagrams. An example of such charts for 1T15-M0 is shown in the figure. Such data allow development of rather exact mathematical models of AS.

Stationary pipeline models

Three mass flow rate versus pressure drop models for pneumatic lines are implemented:

"Atlas"
Fluid mechanics
Fluid mechanic

Pneumatic lines

Time domain pipeline model

The dynamic model of a pipeline is described by a system of differential equations. The model allows taking into account transient processes and inertial properties of long pipelines.

Verification of dynamic pipeline model

Orifice models

Similar to a pipeline, an orifice (nozzle, valve) is a connection between two nodes of pneumatic system. The mathematical model of an orifice includes a dependence of the mass flow rate on the pressure drop. The following orifice models are available in UM:

Nozzle
ISO 6358

Pneumatic systems

A pneumatic system in UM is considered as a graph, which nodes are connected by edges. Each node of a graph corresponds to one of the pneumatic elements: