Tunable resonance haptic device
Rendering of a haptic effect at a target frequency or frequency range by providing a moveable mass configured to be driven at a resonance frequency of a primary spring coupled to the moveable mass. Then, an auxiliary spring is temporarily engaged with the moveable mass to tune the resonance frequency to the target frequency or frequency range.
1. A haptic output device, comprising:
a moveable mass configured to render a haptic effect;
a primary spring coupled to the moveable mass, wherein the moveable mass is driven at a resonance frequency of the primary spring; and
at least one auxiliary spring configured to temporarily engage with the moveable mass to tune the resonance frequency to a target frequency or frequency range at which the haptic effect is rendered.
2. The haptic output device of claim 1 , wherein a stiffness of the at least one auxiliary spring is adjustable in order to further tune the resonance frequency to the target frequency or frequency range.
3. The haptic output device of claim 1 , wherein the at least one auxiliary spring includes a first auxiliary spring and a second auxiliary spring configured to temporarily engage with opposing sides of the moveable mass.
4. The haptic output device of claim 3 , wherein
the first auxiliary spring is configured to temporarily engage with the moveable mass at a first time, and
the second auxiliary spring is configured to temporarily engage with the moveable mass at a second time, the second time at least partially overlapping with the first time.
5. The haptic output device of claim 1 , wherein
the at least one auxiliary spring is coupled to an electroadhesive pad, and
the at least one auxiliary spring is temporarily engaged with the moveable mass via the electroadhesive pad.
6. The haptic output device of claim 5 , wherein
the at least one auxiliary spring is temporarily engaged with the moveable mass via a locking mechanism.
7. The haptic output device of claim 1 , wherein the moveable mass is an electromagnetic-driven moveable mass.
8. The haptic output device of claim 1 being a linear resonance actuator.
9. The haptic output device of claim 1 , further comprising:
a damper configured to temporarily engage with the moveable mass to further tune the resonance frequency to the target frequency or frequency range.
10. A method of rendering of a haptic effect at a target frequency or frequency range, comprising:
providing a moveable mass configured to be driven at a resonance frequency of a primary spring coupled to the moveable mass; and
rendering the haptic effect at the target frequency by temporarily engaging at least one auxiliary spring with the moveable mass to tune the resonance frequency to the target frequency or frequency range.
11. The method of claim 10 , further comprising:
adjusting a stiffness of at least one auxiliary spring engaged with the moveable mass to further tune the resonance frequency to the target frequency or frequency range.
12. The method of claim 11 , wherein the adjusting of the stiffness of at least one auxiliary spring causes a frequency range of the resonance frequency to increase or decrease.
13. The method of claim 10 , wherein
the at least one auxiliary spring includes a first auxiliary spring and a second auxiliary spring coupled to opposing sides of the moveable mass, and
the rendering of the haptic effect at the target frequency or frequency range includes temporarily engaging the first auxiliary spring with the moveable mass, and temporarily engaging the second auxiliary spring with the moveable mass.
14. The method of claim 13 , wherein the first auxiliary spring and the second auxiliary spring are temporarily engaged with the moveable mass at a same time.
15. The method of claim 13 , wherein the first auxiliary spring is temporarily engaged with the moveable mass at a first time and the second auxiliary spring is temporarily engaged with the moveable mass at a second time, the second time at least partially overlapping with the first time.
16. The method of claim of 10 , wherein
the at least one auxiliary spring is coupled to an electroadhesive pad, and
the temporarily engaging of the at least one auxiliary spring with the moveable mass includes coupling the electroadhesive pad to the moveable mass.
17. The method of claim 10 , wherein
the moveable mass, the primary spring and the at least one auxiliary spring are within an actuator, and
the rendering of the haptic effect at the target frequency or frequency range includes driving the moveable mass using an electromagnetic field generated by applying a current across leads of the actuator.
18. The method of claim 17 , wherein the actuator is a linear resonance actuator.
19. The method of claim 10 , further comprising:
coupling a damper to the moveable mass to further tune the resonance frequency to the target frequency or frequency range.
20. A non-transitory computer readable medium having instructions thereon that, when executed by a processor, cause the processor to perform operations comprising:
driving a moveable mass at a resonance frequency of a primary spring coupled to the moveable mass; and
rendering a haptic effect at a target frequency or frequency range by temporarily engaging at least one auxiliary spring with the moveable mass to tune the resonance frequency to the target frequency or frequency range.