Systems and methods for controlling a resonant device for generating vibrotactile haptic effects
First Claim
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1. A method for braking an actuator comprising:
- generating a first actuator signal having a frequency approximately resonant to the actuator, the first actuator signal configured to drive the actuator;
transmitting the first actuator signal to the actuator;
generating a second actuator signal having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal, the second actuator signal configured to cause a braking force on the actuator; and
transmitting the second actuator signal to the actuator, wherein generating the first actuator signal comprises;
generating a first rectangular wave having a frequency approximately resonant to the actuator,generating a second rectangular wave having approximately the same frequency by logically exclusive-ORing the first rectangular wave with a digital signal in a first logic state; and
generating the second actuator signal comprises;
changing the digital signal to a second logic state,generating a third rectangular wave having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal by logically exclusive-ORing the first rectangular wave with the digital signal in a second logic state.
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Abstract
Systems and methods for controlling a resonant device are described. One described method for braking an actuator includes generating a first actuator signal configured to drive the actuator, the first actuator signal having a first frequency approximately resonant to the actuator, and transmitting the first actuator signal to the actuator. The method also includes generating a second actuator signal, having a second frequency approximately 180 degrees out of phase to the first frequency, the second actuator signal configured to cause a braking force on the actuator, and transmitting the second actuator signal to the actuator.
167 Citations
18 Claims
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1. A method for braking an actuator comprising:
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generating a first actuator signal having a frequency approximately resonant to the actuator, the first actuator signal configured to drive the actuator; transmitting the first actuator signal to the actuator; generating a second actuator signal having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal, the second actuator signal configured to cause a braking force on the actuator; and transmitting the second actuator signal to the actuator, wherein generating the first actuator signal comprises; generating a first rectangular wave having a frequency approximately resonant to the actuator, generating a second rectangular wave having approximately the same frequency by logically exclusive-ORing the first rectangular wave with a digital signal in a first logic state; and generating the second actuator signal comprises; changing the digital signal to a second logic state, generating a third rectangular wave having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal by logically exclusive-ORing the first rectangular wave with the digital signal in a second logic state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for braking an actuator comprising:
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an actuator; and a signal generator in communication with the actuator, the signal generator configured to; generate a first actuator signal having a frequency approximately resonant to the actuator, the first actuator signal configured to drive the actuator, transmit the first actuator signal to the actuator, generate a second actuator signal having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal, the second actuator signal configured to cause a braking force on the actuator, and transmit the second actuator signal to the actuator, wherein the signal generator comprises; a rectangular wave generator configured to generate a first rectangular wave having a frequency approximately equal to the resonant frequency of the actuator; a signal inverter configured to; generate a second rectangular wave having approximately the same frequency as the first rectangular wave and a phase approximately 180 degrees out of phase with the first rectangular wave, and be either enabled or disabled; an amplifier configured to generate an amplified signal configured to drive the actuator a filter in communication with the signal generator, the filter configured to convert a rectangular wave to a substantially-sinusoidal wave of approximately the same frequency and phase as the first rectangular wave; and the amplifier is further configured to generate an amplified signal configured to drive the actuator based at least in part on the output of the filter. - View Dependent Claims (10, 11, 12, 13)
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14. A system for braking an actuator comprising:
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an actuator; and a signal generator in communication with the actuator, the signal generator configured to; generate a first actuator signal having a frequency approximately resonant to the actuator, the first actuator signal configured to drive the actuator, transmit the first actuator signal to the actuator, generate a second actuator signal having approximately the frequency of the first actuator signal and a phase approximately 180 degrees out of phase to the first actuator signal, the second actuator signal configured to cause a braking force on the actuator, and transmit the second actuator signal to the actuator, wherein the signal generator comprises; a rectangular wave generator configured to generate a first rectangular wave having a frequency approximately equal to the resonant frequency of the actuator; a signal inverter configured to; generate a second rectangular wave having approximately the same frequency as the first rectangular wave and a phase approximately 180 degrees out of phase with the first rectangular wave, and be either enabled or disabled; an amplifier configured to generate an amplified signal configured to drive the actuator, and wherein the first signal generator comprises a ripple counter. - View Dependent Claims (15, 16, 17, 18)
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Specification