Vehicular active noise/vibration/sound control system, and vehicle incorporating such system

• US 20060269078A1
• Filed: 05/30/2006
• Published: 11/30/2006
• Est. Priority Date: 05/30/2005
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Takahashi, Akira, Kobayashi, Yasunori, Inoue, Toshio, Sakamoto, Kosuke
• Granted Patent: US 7,876,910 B2
• Time in Patent Office: Days
• US Class Current: 381/71.100
• CPC Class Codes: G10K 11/17821 characterised by the analysis of the input signals only
• CPC Class Codes: G10K 11/17823 Reference signals, e.g. ambient acoustic environment
• CPC Class Codes: G10K 11/1783 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
• CPC Class Codes: G10K 11/17854 the filter being an adaptive filter
• CPC Class Codes: G10K 11/17857 Geometric disposition, e.g. placement of microphones
• 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 2210/1282 Automobiles
• CPC Class Codes: G10K 2210/12821 Rolling noise; Wind and body noise
• CPC Class Codes: G10K 2210/12822 Exhaust pipes or mufflers
• CPC Class Codes: G10K 2210/129 Vibration, e.g. instead of, or in addition to, acoustic noise
• CPC Class Codes: G10K 2210/3016 Control strategies, e.g. energy minimization or intensity measurements
• CPC Class Codes: G10K 2210/3031 Hardware, e.g. architecture
• CPC Class Codes: G10K 2210/3046 Multiple acoustic inputs, multiple acoustic outputs
• CPC Class Codes: G10K 2210/3214 Architectures, e.g. special constructional features or arrangements of features
• CPC Class Codes: G10K 2210/3219 Geometry of the configuration

Abstract

An active noise/vibration/sound control system for a vehicle has an ANC (active noise control apparatus), an AVC (active vibration control apparatus), and an ASC (active sound control apparatus). To prevent the ANC, the AVC, and the ASC from interfering with each other and hence to prevent vehicle cabin environment of vibrations, noise, and sound from being impaired, activation and inactivation of the ANC, the AVC, and the ASC are controlled or their control characteristics are controlled in relation to each other by a weighting variable calculator as a coordination controller, depending on an engine rotation frequency and a frequency change which are representative of a running state of the vehicle as detected by an engine rotation frequency detector and a frequency change detector that serve as a running state detector.

Claims

1. An active noise/vibration/sound control system for use in a vehicle, having at least two of an active noise control apparatus for reducing noise in a vehicle cabin based on a detected signal representative of engine vibrations, an active vibration control apparatus for reducing vehicle vibrations based on said detected signal, and an active sound control apparatus for generating a sound effect in the vehicle cabin based on said detected signal, said active noise/vibration/sound control system comprising:

running state detecting means for detecting a running state of the vehicle; and

coordination control means for controlling activation and inactivation of said active noise control apparatus, said active vibration control apparatus, and said active sound control apparatus or controlling control characteristics thereof in relation to each other, depending on the detected running state of the vehicle.

2. An active noise/vibration/sound control system according to claim 1, wherein said running state detecting means comprises:

an engine rotation frequency detector for detecting an engine rotation frequency; and

a frequency change detector for detecting a frequency change in the detected engine rotation frequency; and

wherein said coordination control means comprises;

a weighting variable calculator for calculating weighting variables for control signals to be applied respectively to said active noise control apparatus, said active vibration control apparatus, and said active sound control apparatus, based on said engine rotation frequency and said frequency change.

3. An active noise/vibration/sound control system according to claim 2, wherein said vehicle has a transmission selectively operable in an automatic transmission mode and a manual transmission mode, and said weighting variable calculator changes weighting variables for the control signal to be applied to said active sound control apparatus depending on whether said transmission operates in said automatic transmission mode or said manual transmission mode.

4. A vehicle incorporating an active noise/vibration/sound control system having at least two of an active noise control apparatus for reducing noise in a vehicle cabin based on a detected signal representative of engine vibrations, an active vibration control apparatus for reducing vehicle vibrations based on said detected signal, and an active sound control apparatus for generating a sound effect in the vehicle cabin based on said detected signal, said vehicle comprising:

running state detecting means for detecting a running state of said vehicle; and

coordination control means for controlling activation and inactivation of said active noise control apparatus, said active vibration control apparatus, and said active sound control apparatus or controlling control characteristics thereof in relation to each other, depending on the detected running state of said vehicle.

5. A vehicle according to claim 4, wherein said running state detecting means comprises:

an engine rotation frequency detector for detecting an engine rotation frequency; and

a frequency change detector for detecting a frequency change in the detected engine rotation frequency; and

wherein said coordination control means comprises;

a weighting variable calculator for calculating weighting variables for control signals to be applied respectively to said active noise control apparatus, said active vibration control apparatus, and said active sound control apparatus, based on said engine rotation frequency and said frequency change.

6. A vehicle according to claim 5, further comprising a transmission selectively operable in an automatic transmission mode and a manual transmission mode, wherein said weighting variable calculator changes weighting variables for the control signal to be applied to said active sound control apparatus depending on whether said transmission operates in said automatic transmission mode or said manual transmission mode.