Control System Having Active Noise and Vibration Centralized Control Through Digital Network

• US 20160300559A1
• Filed: 04/08/2015
• Published: 10/13/2016
• Est. Priority Date: 04/08/2015
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Krishnaswami, Ramasunder, Lee, Ming-Ran, Cheng, Ming-te
• Granted Patent: US 9,779,720 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G10K 11/17823 Reference signals, e.g. ambient acoustic environment
• CPC Class Codes: G10K 11/1785 Methods, e.g. algorithms; Devices G10K11/1781, G10K11/1783 take precedence
• CPC Class Codes: G10K 11/17883 the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
• CPC Class Codes: G10K 11/17885 additionally using a desired external signal, e.g. pass-through audio such as music or speech
• CPC Class Codes: G10K 2210/1282 Automobiles
• CPC Class Codes: G10K 2210/129 Vibration, e.g. instead of, or in addition to, acoustic noise
• CPC Class Codes: G10K 2210/3214 Architectures, e.g. special constructional features or arrangements of features

Abstract

A control system provides centralized active noise control (ANC) and active vibration control (AVC) through a digital network. The control system includes a controller, an audio sub-system, and a vibration sub-system. The audio-sub system includes at least one sound monitoring component and at least one sound outputting component. The vibration sub-system includes at least one vibration monitoring component and at least one vibration actuating component. The controller and the sub-systems are interconnected through the digital network. The controller controls the sub-systems through the digital network to perform the ANC and AVC functions in a holistic approach.

Claims

1. A system comprising:

a controller;

an audio sub-system;

a vibration sub-system; and

a digital network interconnecting the controller and the sub-systems;

wherein through the digital network the controller controls the sub-systems to perform active noise control (ANC) and active vibration control (AVC) functions.

2. The system of claim 1 wherein:

the audio sub-system includes a microphone for detecting noise and a speaker for outputting a noise cancelling sound, wherein the microphone and the speaker are individually connected to the digital network in a daisy chain arrangement to be in communication with the controller.

3. The system of claim 2 wherein:

the controller through the digital network controls the speaker to output a noise cancelling sound corresponding to noise detected by the microphone in order to cancel the noise.

4. The system of claim 2 wherein:

the vibration sub-system includes a vibration sensor for detecting vibrations and a vibration actuator for generating forces, wherein the vibration sensor and the vibration actuator are individually connected to the digital network in the daisy chain arrangement to be in communication with the controller.

5. The system of claim 1 wherein:

the vibration sub-system includes a vibration sensor for detecting vibrations and a vibration actuator for generating forces, wherein the vibration sensor and the vibration actuator are individually connected to the digital network in a daisy chain arrangement to be in communication with the controller.

6. The system of claim 5 wherein:

the controller through the digital network controls the vibration actuator to generate a cancelling force corresponding to a force of a vibration detected by the vibration sensor in order to cancel the vibration detected by the vibration sensor.

7. The system of claim 1 wherein:

the digital network is a single loop, twisted-wire pair capable of distributing audio and control data together with clock and power.

8. The system of claim 1 wherein:

the audio sub-system includes a microphone configured to detect noise and a speaker configured to output a noise cancelling sound;

the vibration sub-system includes a vibration actuator configured to generate vibrations;

the controller through the digital network controls, based on noise detected by the microphone, the speaker to output a noise cancelling sound and the vibration actuator to generate a force causing a noise cancelling sound to be generated.

9. The system of claim 1 wherein:

the audio sub-system includes a microphone configured to detect noise and a plurality of speakers each configured to output a noise cancelling sound;

the controller through the digital network controls a subset of the speakers to output noise cancelling sounds based on noise detected by the microphone.

10. The system of claim 9 wherein:

the vibration sub-system includes a plurality of vibration actuators each configured to generate forces;

the controller through the digital network controls, based on noise detected by the microphone, a subset of the speakers to output noise cancelling sounds and a subset of the vibration actuators to generate forces causing noise cancelling sounds to be generated.

11. The system of claim 1 wherein:

the audio sub-system includes a speaker configured to output a noise cancelling sound;

the vibration sub-system includes a vibration sensor configured to detect vibrations and a vibration actuator configured to generate forces;

the controller through the digital network controls, based on vibrations detected by the vibration sensor, the vibration actuator to generate cancelling forces and the speaker to output a noise cancelling sound.

12. The system of claim 1 wherein:

the vibration sub-system includes a vibration sensor configured to detect vibrations and a plurality of vibration actuators each configured to generate forces;

the controller through the digital network controls a subset of the vibration actuators to generate cancelling forces based on forces of vibrations detected by the vibration sensor.

13. The system of claim 12 wherein:

the audio sub-system includes a plurality of speakers each configured to output a noise cancelling sound;

the controller through the digital network controls, based on vibrations detected by the vibration sensor, a subset of vibration actuators to generate cancelling forces and a subset of the speakers to output noise cancelling sounds.

14. The system of claim 1 wherein:

the audio sub-system includes interior speakers for outputting noise cancelling sounds to counteract cabin noise, an air induction system speaker for outputting a noise cancelling sound to counteract air induction system orifice noise, and an exhaust system speaker for outputting a noise cancelling sound to counteract exhaust system tail pipe orifice noise;

the vibration sub-system includes vibration actuators for generating forces; and

wherein the controller controls the speakers and the vibration actuators in combination for air induction system and exhaust system ANC functions.

15. A vehicle comprising:

a digital network; and

a control system including a controller, an audio sub-system, and a vibration sub-system interconnected through the digital network, wherein through the digital network the controller controls the sub-systems to perform active noise control (ANC) and active vibration control (AVC) functions.

16. The vehicle of claim 15 further comprising:

a controller area network (CAN) bus; and

a powertrain control unit;

wherein the controller is connected via the CAN bus to the powertrain control unit to receive vehicle related information for use by the controller in performing the ANC and AVC functions.

17. The vehicle of claim 15 wherein:

the audio sub-system includes a microphone for detecting noise and a speaker for outputting a noise cancelling sound and the vibration sub-system includes a vibration sensor for detecting vibrations and a vibration actuator for generating forces;

the microphone, the speaker, the vibration sensor, and the vibration actuator are individually connected to the digital network in a daisy chain arrangement to be in communication with the controller.

18. The vehicle of claim 17 wherein:

the controller through the digital network controls, based on noise detected by the microphone, the speaker to output a noise cancelling sound and the vibration actuator to generate noise inducing forces.

19. The vehicle of claim 17 wherein:

the controller through the digital network controls the vibration actuator to generate vibration cancelling forces and the speaker to output a noise cancelling sound based on vibrations detected by the vibration sensor.

20. The vehicle of claim 15 wherein:

the audio sub-system includes interior speakers for outputting noise cancelling sounds to counteract cabin noise, an air induction system speaker for outputting a noise cancelling sound to counteract air induction system orifice noise, and an exhaust system speaker for outputting a noise cancelling sound to counteract exhaust system tail pipe orifice noise;

the vibration sub-system includes vibration actuators for generating forces; and

wherein the controller controls the speakers and the vibration actuators in combination for air induction system and exhaust system ANC functions.