To avoid chattering when using a spool in a hydraulic valve, it is often necessary to hold the spool in a locked position until the external force exceeds a certain threshold value. In this example, we will explore the interaction between such a force and the spool’s position in a spool with a preload.
The image shows a schematic drawing of a spool that can easily be transferred to a model using SystemModeler
and the ElastoGap elements found in the Modelica.Mechanics
In the PreLoad model in the Mechanics library, a sinusoidal force acts on a spool of a certain mass. In order for the spool to move in either direction, this force has to cross a certain threshold value where it overcomes friction. The model also contains a spring that ensures the return of the spool into a neutral position if the force is removed.
Simulation Results and custom animation
Create interactive custom animations of the simulation result to your liking using built-in Mathematica functions.