WO1998016760A3 - Vibration attenuation system - Google Patents

Vibration attenuation system Download PDF

Info

Publication number
WO1998016760A3
WO1998016760A3 PCT/GB1997/002730 GB9702730W WO9816760A3 WO 1998016760 A3 WO1998016760 A3 WO 1998016760A3 GB 9702730 W GB9702730 W GB 9702730W WO 9816760 A3 WO9816760 A3 WO 9816760A3
Authority
WO
WIPO (PCT)
Prior art keywords
stiffness
mount
mode
switched
idle
Prior art date
Application number
PCT/GB1997/002730
Other languages
French (fr)
Other versions
WO1998016760A2 (en
Inventor
Ronnie Chi Nang Leung
Original Assignee
Ronnie Chi Nang Leung
Secr Defence
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ronnie Chi Nang Leung, Secr Defence filed Critical Ronnie Chi Nang Leung
Priority to AU45659/97A priority Critical patent/AU4565997A/en
Publication of WO1998016760A2 publication Critical patent/WO1998016760A2/en
Publication of WO1998016760A3 publication Critical patent/WO1998016760A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/1005—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass
    • F16F7/1017—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass by fluid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
    • F16F15/0275—Control of stiffness
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • G10K2210/12822—Exhaust pipes or mufflers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3026—Feedback
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3227—Resonators
    • G10K2210/32271—Active resonators
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/50—Miscellaneous
    • G10K2210/51—Improving tonal quality, e.g. mimicking sports cars

Abstract

A vibration attenuation system comprises at least one operative machine (17), one idle machine (18) and a support (21). Each machine (17, 18) is mounted on the support (21) via respective operative and idle mounts (19, 20). The stiffness of each mount (19, 20) may be switched between an isolation mode and an absorption mode. The stiffness of the operative mount is switched to isolation mode and the stiffness of the idle mount is switched to absorption mode to minimise vibration in the support (21). The mounts can be mechanical mounts such as springs, which are connected or disconnected according to which mode is required, or can have variable stiffness, for example a mount whose stiffness is dependent upon a change in potential applied to an electro-rheological fluid causing a change in viscosity of the fluid. The system is particularly suitable for reducing vibration in aircraft or ships.
PCT/GB1997/002730 1996-10-15 1997-10-06 Vibration attenuation system WO1998016760A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45659/97A AU4565997A (en) 1996-10-15 1997-10-06 Vibration attenuation system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9621498.6A GB9621498D0 (en) 1996-10-15 1996-10-15 Vibration attenuation system
GB9621498.6 1996-10-15

Publications (2)

Publication Number Publication Date
WO1998016760A2 WO1998016760A2 (en) 1998-04-23
WO1998016760A3 true WO1998016760A3 (en) 1998-05-22

Family

ID=10801462

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/002730 WO1998016760A2 (en) 1996-10-15 1997-10-06 Vibration attenuation system

Country Status (3)

Country Link
AU (1) AU4565997A (en)
GB (1) GB9621498D0 (en)
WO (1) WO1998016760A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717692A1 (en) * 1997-04-26 1998-10-29 Schenck Ag Carl Spring mass vibration force coupler
GB9727021D0 (en) * 1997-12-23 1998-02-18 Rover Group Vibration absorbing system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4930741A (en) * 1987-06-08 1990-06-05 Vibro Dynamics Corporation Power assisted equipment mounting system
EP0412853A2 (en) * 1989-08-11 1991-02-13 Bridgestone Corporation Active-type vibration control apparatus
EP0537927A1 (en) * 1991-10-15 1993-04-21 Lord Corporation Fluid mount with active vibration control
US5267633A (en) * 1991-02-15 1993-12-07 Bridgestone Corporation Electrorheological fluid-applied apparatus, electrorheological fluid-applied vibration controller, and electrorheological fluid-applied fixing apparatus
EP0676558A1 (en) * 1994-04-04 1995-10-11 Applied Power Inc. Stiff actuator active vibration isolation system
WO1995034769A1 (en) * 1994-06-16 1995-12-21 Lord Corporation Active mounts for aircraft engines
US5505871A (en) * 1993-11-23 1996-04-09 General Atomics Electrorheological elastomeric composite materials
US5547049A (en) * 1994-05-31 1996-08-20 Lord Corporation Magnetorheological fluid composite structures

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4930741A (en) * 1987-06-08 1990-06-05 Vibro Dynamics Corporation Power assisted equipment mounting system
EP0412853A2 (en) * 1989-08-11 1991-02-13 Bridgestone Corporation Active-type vibration control apparatus
US5267633A (en) * 1991-02-15 1993-12-07 Bridgestone Corporation Electrorheological fluid-applied apparatus, electrorheological fluid-applied vibration controller, and electrorheological fluid-applied fixing apparatus
EP0537927A1 (en) * 1991-10-15 1993-04-21 Lord Corporation Fluid mount with active vibration control
US5505871A (en) * 1993-11-23 1996-04-09 General Atomics Electrorheological elastomeric composite materials
EP0676558A1 (en) * 1994-04-04 1995-10-11 Applied Power Inc. Stiff actuator active vibration isolation system
US5547049A (en) * 1994-05-31 1996-08-20 Lord Corporation Magnetorheological fluid composite structures
WO1995034769A1 (en) * 1994-06-16 1995-12-21 Lord Corporation Active mounts for aircraft engines

Also Published As

Publication number Publication date
GB9621498D0 (en) 1996-12-04
WO1998016760A2 (en) 1998-04-23
AU4565997A (en) 1998-05-11

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