Generation and braking of vibrations
An actuator system configured to generate a haptic effect, the actuator system including a housing of an electronic device, the housing being configured to form a mechanical ground, a first actuator disposed between a first moving mass and the mechanical ground, the first actuator being configured to render the haptic effect, and a second actuator disposed between a second moving mass and the mechanical ground, the second actuator being configured to dampen the haptic effect.
1. An actuator system configured to generate a haptic effect, the actuator system comprising:
a housing of an electronic device, the housing being configured to form a mechanical ground;
a first actuator disposed between a first moving mass and the mechanical ground, the first actuator being configured to render the haptic effect; and
a second actuator disposed between a second moving mass and the mechanical ground, the second actuator being configured to dampen the haptic effect.
2. The actuator system according to claim 1 ,
wherein the first actuator and the second actuator are mechanically coupled to a pushable user input element and/or a rotatable user input element.
3. The actuator system according to claim 1 ,
wherein a size of the second moving mass is calibrated to dampen the haptic effect according to a resonant frequency of the first actuator.
4. The actuator system according to claim 1 ,
wherein the mechanical ground includes another component that is mechanically coupled to the housing.
5. The actuator system according to claim 1 ,
wherein the first actuator is driven by a closed-loop drive circuit or an open-loop drive circuit.
6. The actuator system according to claim 1 ,
wherein the second actuator is driven by a closed-loop drive circuit or an open-loop drive circuit.
7. The actuator system according to claim 6 ,
wherein the second actuator is configured as a sensor for the closed-loop drive circuit.
8. The actuator system according to claim 1 ,
wherein each of the first actuator and the second actuator is a piezoelectric actuator.
9. The actuator system according to claim 8 ,
wherein a motion of the second actuator is inverted to generate a braking force that is tuned to dampen the haptic effect.
10. The actuator system according to claim 1 ,
wherein the haptic effect has a duration of approximately 5 ms, and
wherein the haptic effect reaches a peak acceleration value of at least 2.5 Gpp within the duration.
11. The actuator system according to claim 1 , further comprising:
a sensor that is configured to monitor vibration after rendering the haptic effect.
12. The actuator system according to claim 11 ,
wherein the sensor is mounted on one of the first actuator, the second actuator, or the housing.
13. The actuator system according to claim 1 ,
wherein the first actuator has a first resonant frequency and the second actuator has a second resonant frequency.
14. The actuator system according to claim 13 ,
wherein the second resonant frequency is different than the first resonant frequency.
15. The actuator system according to claim 14 ,
wherein the second resonant frequency is calibrated to eliminate vibrations of the haptic effect within 5 ms.