| 摘要 |
A system for generating haptic effects on a rotary knob includes an electrical coil and a core. A first level of voltage is applied to the coil to enable a first surface interface having a first coefficient of friction and to generate a first haptic effect by varying the voltage. A second level of voltage is applied to the coil to enable a second surface interface having a second coefficient of friction that is greater than the first coefficient of friction and to generate a second haptic effect by varying the voltage.
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