Tactile energy generation based on audio signal
Methods and systems are provided for generation of lower-frequency tactile energy (e.g., vibration) of a vehicle system based on audio signals. In one example, a method may include acquiring an audio signal from an audio system, generating a motor input command, and applying the motor input command to at least a first traction motor and a second traction motor to create a resultant vibrational force.
1. A method for creating tactile energy in a vehicle system, comprising:
acquiring an audio signal from an audio source;
responsive to acquiring the audio signal, generating a first motor input command for a first traction motor driving a wheel of the vehicle system, wherein the audio signal is processed to generate the first motor input command for the first traction motor when a decibel level of the audio signal is greater than a decibel threshold.
2. A method for creating tactile energy in a vehicle system, comprising:
acquiring an audio signal from an audio source;
responsive to acquiring the audio signal, generating a first motor input command for a first traction motor driving a wheel of the vehicle system, wherein the first motor input command is generated using a frequency content of the audio signal by further processing the audio signal such that an amplitude of the first motor input command over time corresponds to the frequency content of the audio signal.
3. The method of claim 2 , wherein changes in the amplitude of the first motor input command over time generates fluctuating torque which corresponds to the frequency content of the audio signal.
4. A method for creating tactile energy in a vehicle system, comprising:
acquiring an audio signal from an audio source;
responsive to acquiring the audio signal, generating a first motor input command for a first traction motor driving a wheel of the vehicle system, wherein the first motor input command is generated using an arbitrary and/or pre-determined frequency content by using the audio signal as a trigger to initiate generation of the first motor input command when a decibel level of the audio signal is greater than a decibel threshold, such that the first motor input command is comprised of a plurality of frequencies or a pre-determined frequency content.
5. The method of claim 4 , wherein fluctuating torque generated based on the first motor input command represents the arbitrary and/or pre-determined frequency content.
6. A method for creating tactile energy in a vehicle system, comprising:
acquiring an audio signal from an audio source;
responsive to acquiring the audio signal, generating a first motor input command for a first traction motor driving a wheel of the vehicle system, wherein the first motor input command is generated responsive to acquiring the audio signal from a user selected audio source and the first motor input command is not generated responsive to acquiring the audio signal from an unselected audio source.
7. The method of claim 1 , further comprising:
applying the first motor input command to the first traction motor; and
responsive to application of the first motor input command to the first traction motor, generating persistent torque and transferring persistent torque to a motor mount of the first traction motor, and generating fluctuating torque and transferring fluctuating torque to a drivetrain of the vehicle system to create a resultant vibrational force.
8. The method of claim 7 , wherein applying the first motor input command to the first traction motor is implemented when the vehicle system is in a park mode and the first motor input command is not applied to the first traction motor when a mu value drops below a mu threshold, and/or the vehicle system exits the park mode.
9. The method of claim 7 , further comprising:
generating a second motor input command according to the method used to generate the first motor input command;
applying the second motor input command to a second traction motor; and
responsive to application of the second motor input command to the second traction motor, generating fluctuating torque in a second direction that is opposite of a first direction of rotation of the first traction motor when the first traction motor is positioned on a first axle and the second traction motor is positioned on a second axle.
10. The method of claim 9 , wherein matching opposite torque is applied to each of the first traction motor and the second traction motor to generate a vertical translation of a sprung mass of the vehicle system when the vehicle system is configured with the first traction motor on a front axle and the second traction motor on a rear axle, different from the front axle.
11. The method of claim 9 , further comprising:
generating a third motor input command and optionally generating a fourth motor input command according to the method used to generate the first motor input command;
applying the third motor input command to a third traction motor and applying the fourth motor input command to a fourth traction motor;
responsive to application of the third motor input command to the third traction motor, generating fluctuating torque in the first direction when the first traction motor and the third traction motor are positioned on the first axle; and,
responsive to application of the fourth motor input command to the fourth traction motor, generating fluctuating torque in the second direction when the second traction motor and the fourth traction motor are positioned on the second axle.
12. A vehicle system, comprising:
at least one traction motor; and
a controller with computer readable instructions that when executed, while the vehicle system is a park mode, cause the controller to:
acquire an audio signal from an audio source;
generate at least one motor input command based on or in response to acquiring the audio signal;
use each of the at least one motor input command to command generation of persistent torque and fluctuating torque by each of the at least one traction motors to generate vibration of the vehicle system.
13. The vehicle system of claim 12 , wherein each traction motor of the at least one traction motors are coupled to a wheel of a set of wheels of the vehicle system.
14. The vehicle system of claim 12 , wherein, in response to receiving a first motor input command, a first traction motor of the at least one traction motor positioned on a first axle of the vehicle system generates fluctuating torque in a first rotational direction and in response to receiving a second motor input command, a second traction motor of the at least one traction motor positioned on a second axle of the vehicle system generates fluctuating torque in a second rotational direction, opposite the first rotational direction.
15. A method for an electric vehicle traction motor, including:
driving a motor input command of a traction motor with audio signals in an electric vehicle to provide lower-frequency tactile energy, wherein the input of the traction motor commands application of persistent torque and fluctuating torque representative of a frequency content of audio signals to the traction motor.
16. The method of claim 15 , wherein the motor input command of the traction motor is generated by processing an audio signal with a low-pass filter and/or a band-pass filter.
17. The method of claim 15 , further comprising driving the input of the traction motor when the electric vehicle is in a park mode.