Editing System dynamics (section)

=== Example: Piston motion ===
# Objective: study of a crank-connecting rod system.<br /> We want to model a crank-connecting rod system through a system dynamic model. Two different full descriptions of the physical system with related systems of equations can be found  [[Piston motion equations#Position|here]] {{in lang|en}} and [[:fr:Système bielle-manivelle#Équations horaires|here]] {{in lang|fr}}; they give the same results. In this example, the crank, with variable radius and angular frequency, will drive a piston with a variable connecting rod length.
# System dynamic modeling: the system is now modeled, according to a stock and flow system dynamic logic.<br /> The figure below shows the stock and flow diagram [[Image:TRUE Piston SFD.png|centre|Stock and flow diagram for crank-connecting rod system|frame]]
# Simulation: the behavior of the crank-connecting rod dynamic system can then be simulated.<br /> The next figure is a 3D simulation created using [[procedural animation]]. Variables of the model animate all parts of this animation: crank, radius, angular frequency, rod length, and piston position.
[[Image:TRUE Procedural Animation.gif|centre|3D [[procedural animation]] of the crank-connecting rod system modeled in 2|frame]]