diff --git a/chapters/dae.tex b/chapters/dae.tex index 1a770b80b..2a3606cb8 100644 --- a/chapters/dae.tex +++ b/chapters/dae.tex @@ -104,7 +104,7 @@ \chapter{Modelica DAE Representation}\label{modelica-dae-representation} The generated set of equations is used for simulation and other analysis activities. Simulation proceeds as follows. First, initialization takes place, during which initial values for the states $x$ are found, \cref{initialization-initial-equation-and-initial-algorithm}. -Given those initial values the equations are simulated forward in time; this is called the transient analysis. +Given those initial values the equations are simulated forward in time; this is the transient analysis. The equations define a DAE\index{DAE} (Differential Algebraic Equations) which may have discontinuities, a variable structure and/or which are controlled by a discrete-event system. Such types of systems are called \firstuse[hybrid DAE]{hybrid DAEs}. After initialization, simulation proceeds with transient analysis in the following way: