The Rotational Elasto Backlash (or Elasto Backlash) component consists of a backlash element connected in series with spring and damper elements which are connected in parallel. The spring constant must be positive.

In the backlash region $\left(-\frac{b}{2}\le {\mathrm{\phi }}_b-{\mathrm{\phi }}_a-{\mathrm{\phi }}_{\mathrm{rel0}}\le \frac{b}{2}\right)$ no torque is exerted. Outside of this region, contact is present and the contact torque is basically computed with a linear spring/damper characteristic.

If the backlash parameter $b$ is smaller than $b_{\mathrm{\epsilon }}$, the backlash is ignored and the component reduces to a spring/damper element in parallel.

During initialization, the backlash characteristic is replaced by a continuous approximation in the backlash region.

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.