Active noise control device and vehicle
AssigneeHonda Motor Co., Ltd.
InventorKosuke Sakamoto
Life of this patent
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Abstract
An active noise control device includes a basic signal generating unit configured to generate a basic signal corresponding to a resonance frequency of a vibration sensor, a first adaptive filter configured to generate a sensor resonance simulation signal simulating a signal acquired while the vibration sensor is resonating by performing a filtering process on the basic signal, a computation unit configured to calculate a second reference signal that is a difference between a first reference signal acquired by the vibration sensor and the sensor resonance simulation signal, and a second adaptive filter configured to generate a control signal by performing a filtering process on the second reference signal.
Claims6
An active noise control device that causes an actuator to output a canceling sound based on a control signal in order to reduce noise in a vehicle compartment of a vehicle, the active noise control device comprising one or more processors that execute computer-executable instructions stored in a memory, wherein the one or more processors execute the computer-executable instructions to cause the active noise control device to:
- generate a basic signal corresponding to a resonance frequency of a vibration sensor provided at the vehicle;
- generate a sensor resonance simulation signal simulating a signal acquired while the vibration sensor is resonating by performing a filtering process on the basic signal, with a first adaptive filter;
- calculate a second reference signal that is a difference between a first reference signal acquired by the vibration sensor and the sensor resonance simulation signal;
- and
- generate the control signal by performing a filtering process on the second reference signal with a second adaptive filter, the filtering process performed with the second adaptive filter being different from the filtering process performed with the first adaptive filter,
- wherein the one or more processors cause the active noise control device to:
- identify the resonance frequency of the vibration sensor by performing frequency analysis on the first reference signal, and
- generate the basic signal corresponding to the identified resonance frequency.
A vehicle comprising an active noise control device that causes an actuator to output a canceling sound based on a control signal in order to reduce noise in a vehicle compartment of the vehicle, the active noise control device including one or more processors that execute computer-executable instructions stored in a memory, wherein the one or more processors execute the computer-executable instructions to cause the active noise control device to:
- generate a basic signal corresponding to a resonance frequency of a vibration sensor provided at the vehicle;
- generate a sensor resonance simulation signal simulating a signal acquired while the vibration sensor is resonating by performing a filtering process on the basic signal, with a first adaptive filter;
- calculate a second reference signal that is a difference between a first reference signal acquired by the vibration sensor and the sensor resonance simulation signal;
- and
- generate the control signal by performing a filtering process on the second reference signal with a second adaptive filter, the filtering process performed with the second adaptive filter being different from the filtering process performed with the first adaptive filter,
- wherein the one or more processors cause the active noise control device to:
- identify the resonance frequency of the vibration sensor by performing frequency analysis on the first reference signal, and
- generate the basic signal corresponding to the identified resonance frequency.
Dependencies are inferred from the claim text.