Active noise control using a single sensor input
AssigneeSiemens VDO Automotive Corporation
InventorManish Vaishya
Life of this patent
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Abstract
An active noise control system (20) includes a controller (34) that receives a signal from a single pressure sensor (36). The controller (34) estimates an engine speed of an engine (30) and a throttle position of a throttle valve associated with an air intake manifold (32). The controller (34) generates a noise control signal that drives a speaker (38), which responsively generates a noise attenuation signal. The disclosed embodiment may be used in an after-market product as it requires minimal interfacing with other vehicle electronics.
Claims14
An active noise control system, comprising:
- a speaker for generating a noise attenuation signal;
- and
- a controller that controls the speaker with a control signal corresponding to the noise attenuation signal, the controller using a single air pressure signal to determine an estimated engine speed and an estimated throttle position and generating the control signal based upon the estimated engine speed and the estimated throttle position.
A method of controlling an active noise control system, comprising:
- estimating an engine speed from an air flow signal;
- estimating a throttle position from the same air flow signal;
- and
- generating a noise control signal using the estimated engine speed and the estimated throttle position.
Dependencies are inferred from the claim text.