A Library for Synchronous Control Systems in Modelica
Martin Otter, Bernhard hiele, Hilding Elmqvist · Linköping electronic conference proceedings · 2012
Based on the synchronous language elements introduced in Modelica 3.3, a library is described to utilize the new features in a convenient way for graphical model definition of sampled data systems.The library has elements to define periodic clocks and event clocks that trigger elements to sample, subsample or super-sample partitions synchronously.Optionally, quantization effects, computational delay or noise can be simulated.Continuous-time equations can be automatically discretized and utilized in a sampled data system.This is demonstrated by using the inverse of a nonlinear plant model in the feed forward path of a discrete controller of a mixing unit.