Distributed Modelling for Simulation of Pneumatic Systems
Petter Krus · Proceedings of the JFPS International Symposium on Fluid Power · 1999
Efficient modelling of systems with gas filled lines is of great importance for modelling of complex pneumatic systems. Other application areas, which are of importance, are ventilation systems with heat exchangers, coolers, air conditioning or heat pumps. The basic physical relationships in pneumatics are well known. The contribution of this paper is to present models that can be used for efficient simulation of large-scale systems. This is achieved by using distributed modelling technique (or transmission line modelling). The benefits of distributed modelling regarding numerical properties are well known. The most important property is that it allows the system to be partitioned by the time delays present in transmission lines. In this way it is possible to solve the equations of a subsystem/components independently from other subsystems/components in each time step. As a by-product, long transmission lines, including inertance effects, can also be easily modelled.