model Spring "Linear 1D rotational spring"
extends Modelica.Mechanics.Rotational.Interfaces.PartialCompliant;
parameter SI.RotationalSpringConstant c(final min = 0, start = 100000) "Spring constant";
parameter SI.Angle phi_rel0 = 0 "Unstretched spring angle";
equation
tau = c * (phi_rel - phi_rel0);
annotation (
Documentation(info = "<html>\n<p>\nA <strong>linear 1D rotational spring</strong>. The component can be connected either\nbetween two inertias/gears to describe the shaft elasticity, or between\na inertia/gear and the housing (component Fixed), to describe\na coupling of the element with the housing via a spring.\n</p>\n\n</html>"),
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Text(
extent = {
{-150, 80},
{150, 40}},
textString = "%name",
lineColor = {0, 0, 255}),
Text(
extent = {
{-150, -40},
{150, -80}},
textString = "c=%c"),
Line(points = {
{-100, 0},
{-58, 0},
{-43, -30},
{-13, 30},
{17, -30},
{47, 30},
{62, 0},
{100, 0}})}),
Diagram(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Line(
points = {
{-68, 0},
{-68, 65}},
color = {128, 128, 128}),
Line(
points = {
{72, 0},
{72, 65}},
color = {128, 128, 128}),
Line(
points = {
{-68, 60},
{72, 60}},
color = {128, 128, 128}),
Polygon(
points = {
{62, 63},
{72, 60},
{62, 57},
{62, 63}},
lineColor = {128, 128, 128},
fillColor = {128, 128, 128},
fillPattern = FillPattern.Solid),
Text(
extent = {
{-22, 62},
{18, 87}},
lineColor = {0, 0, 255},
textString = "phi_rel"),
Line(
points = {
{-96, 0},
{-60, 0},
{-42, -32},
{-12, 30},
{18, -30},
{48, 28},
{62, 0},
{96, 0}},
color = {0, 0, 255})}));
end Spring;