Glossary

g Level: Measured with an accelerometer, this is a measurement of the type of acceleration that is caused by mechanical contact forces between object surfaces.

Haptic Effect: The resultant feeling determined by input signal strength, shape, control method and mechanical design, as measured in g’s, that the user would feel while interacting with an HMI.

High Definition Effects: The range of effects from low frequency effects that mimic a heart beat to high frequency effects that mimic an applauding audience produced at a discernible g level.

HMI: Human Machine Interface Natural Frequency: The Natural Frequency of a system is calculated with the following equation:

The Natural Frequency of a system is calculated with the following equation:


Touch Interrupt or Event: The act of an end user touching the HMI surface. Most commonly this triggers the control algorithm that drives the haptic actuators.

Touch Surface: : The HMI surface that the end user interacts with. This could be a touch screen, a touch pad or a touch panel.