[go: up one dir, main page]

WO2003060345A1 - Amortisseur massique accorde mettant en oeuvre un hexapode - Google Patents

Amortisseur massique accorde mettant en oeuvre un hexapode Download PDF

Info

Publication number
WO2003060345A1
WO2003060345A1 PCT/US2003/001123 US0301123W WO03060345A1 WO 2003060345 A1 WO2003060345 A1 WO 2003060345A1 US 0301123 W US0301123 W US 0301123W WO 03060345 A1 WO03060345 A1 WO 03060345A1
Authority
WO
WIPO (PCT)
Prior art keywords
mass
hexapod
isolators
tmd
damping
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2003/001123
Other languages
English (en)
Inventor
Davis S. Toren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
Honeywell International Inc
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 Honeywell International Inc filed Critical Honeywell International Inc
Priority to AU2003205138A priority Critical patent/AU2003205138A1/en
Publication of WO2003060345A1 publication Critical patent/WO2003060345A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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

Definitions

  • a tuned mass damper provides improved damping to structures and devices at a single frequency by tuning the damper's natural frequency to be at or close to the single frequency.
  • TMDs are attached to the structure at an effective position, usually the anti- node, to counteract the device's vibration. The vibration stimulates the TMD to oscillator independently, 180 degrees out of phase, reducing the devices vibration.
  • a TMD typically is adjusted at the factory by changing springs or removing material from the oscillating mass, estimating the frequency of the device to be damped.
  • the typical TMD comprises a mass, a spring, and a damping means which form a system with a specific natural resonant frequency, and because of that structure, it is difficult to tune that frequency.
  • a hexapod As a solution to using a plurality of TMD's in each orthogonal direction, one mass is mounted on a "hexapod" of isolators (spring/damper) attached to the structure mass or device.
  • a hexapod as described in U.S. Patent 5,305,981, has the characteristic of being a reliable and predictable mounting system where six rigid body modes can be adjusted and decoupled from each other by changing "strut" angles, stiffness, damping, and the TMD mass properties.
  • a hexapod mounted TMD reduces the weight and volume required by utilizing the same mass and provides proper damping in all six degrees of freedom, three directions and three rotations.
  • Fig. 1 is a side view showing a mass connected to a structure by isolator struts in a hexapod according to the invention.
  • Fig. 2 is a section along 2-2 in Fig. 1.
  • Fig. 3 is a mechanical diagram illustrating the TMD associated with each isolator.
  • a tuned mass 10 is employed to reduce oscillations of a structure "damped mass" 12, by the using six isolator struts 14 connecting the mass 10 and damped mass 12 in a hexapod or "Stewart Platform" configuration.
  • Fig. 3 shows that each strut 14 comprises a spring 15 and dashpot 16 in parallel, which combined with the mass 10 form a TMD along the spring (strut) extension axis.
  • Each strut has spherical joint or pivot 18.
  • These well-known struts 14 are traditionally used as isolators for shock absorption mounts for payloads on spacecraft, one type commonly known as the D-Strut brand isolator by Honeywell International Inc.
  • each strut 14 has been used in a hexapod configuration for that purpose.
  • the application and result are different in this arrangement, but with the predictable or deterministic mechanics of the hexapod, each strut 14 can be tuned with the one mass 10 to reduce particular frequencies alone or in combination with one or more other struts 14. This is because each strut 14 can move independently; that is, without extending the others, only requiring rotation at each strut's pivot point 18.
  • the mass 10 can rotate around the pivot 18 without extending the associated strut 14, even though other struts, for instance struts 20, 21, will extend.
  • each strut can be calculated, thus making it possible to finely tune each strut by adjusting its respective spring 15 constant and location for a particular structure (damped mass 12).
  • the one mass 10 and each strut 14 is a directional TMD, in effect, and vibrations in all six degrees of freedom, possibly differing in frequency, of damped mass 12 can be damped with a single TMD mass with predetermined inertia properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne une masse (10) permettant de créer un amortisseur massique accordé destiné à une structure (12) et étant montée sur des tiges isolantes (14) reliant la masse (10) et la structure (12) selon un motif hexapode permettant d'obtenir un amortissement prévisible de ladite structure dans les six degrés de liberté.
PCT/US2003/001123 2002-01-15 2003-01-14 Amortisseur massique accorde mettant en oeuvre un hexapode Ceased WO2003060345A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003205138A AU2003205138A1 (en) 2002-01-15 2003-01-14 Tuned mass damper using a hexapod

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/025,026 2001-12-19
US2502602A 2002-01-15 2002-01-15

Publications (1)

Publication Number Publication Date
WO2003060345A1 true WO2003060345A1 (fr) 2003-07-24

Family

ID=21823644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/001123 Ceased WO2003060345A1 (fr) 2002-01-15 2003-01-14 Amortisseur massique accorde mettant en oeuvre un hexapode

Country Status (2)

Country Link
AU (1) AU2003205138A1 (fr)
WO (1) WO2003060345A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3467339A1 (fr) * 2017-10-06 2019-04-10 The Boeing Company Systèmes et amortisseurs magnétiques accordés pour l'utilisation d'inductance(s) dans l'isolation d'un amortisseur magnétique skyhook

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305981A (en) 1991-10-31 1994-04-26 Honeywell Inc. Multiaxis vibration isolation system
US5775472A (en) 1995-06-27 1998-07-07 Honeywell Inc. Multi-axis tuned mass damper
US5873438A (en) 1996-01-25 1999-02-23 Honeywell Inc. Tuned mass damper with tunable damping and anti friction rolling mass
US6315094B1 (en) * 2000-05-19 2001-11-13 The United States Of America As Represented By The Secretary Of The Air Force Passive virtual skyhook vibration isolation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305981A (en) 1991-10-31 1994-04-26 Honeywell Inc. Multiaxis vibration isolation system
US5775472A (en) 1995-06-27 1998-07-07 Honeywell Inc. Multi-axis tuned mass damper
US5873438A (en) 1996-01-25 1999-02-23 Honeywell Inc. Tuned mass damper with tunable damping and anti friction rolling mass
US6315094B1 (en) * 2000-05-19 2001-11-13 The United States Of America As Represented By The Secretary Of The Air Force Passive virtual skyhook vibration isolation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3467339A1 (fr) * 2017-10-06 2019-04-10 The Boeing Company Systèmes et amortisseurs magnétiques accordés pour l'utilisation d'inductance(s) dans l'isolation d'un amortisseur magnétique skyhook
US10295011B2 (en) 2017-10-06 2019-05-21 The Boeing Company Systems and tuned magnetic dashpots for using inductor(s) in magnetic skyhook damper isolation

Also Published As

Publication number Publication date
AU2003205138A1 (en) 2003-07-30

Similar Documents

Publication Publication Date Title
US5775472A (en) Multi-axis tuned mass damper
Kamesh et al. Modeling, design and analysis of low frequency platform for attenuating micro-vibration in spacecraft
US6983833B2 (en) Self-tuning vibration absorber system and method of absorbing varying frequency vehicle vibrations
US6634472B1 (en) Tuned mass damper with translational axis damping
US5816373A (en) Pneumatic tuned mass damper
EP1419089B1 (fr) Dispositif compact de suppression de vibrations
US11753819B2 (en) Adjustable stiffness assembly
KR101550475B1 (ko) 탄성중합체를 기반으로 하는, 진동 및 충격에 대한 다축식 차단용 모듈형 장치
JPH10159898A (ja) 多次元振動外乱の遮断装置
US20030132077A1 (en) Tuned mass damper using a hexapod
AU2002332609A1 (en) Compact vibration cancellation device
US10619699B2 (en) Self-turning compact vibration damper
US20100133448A1 (en) Object-Positioning Device for Charged-Particle Beam System
RU2475658C2 (ru) Способ регулирования жесткости виброзащитной системы и устройство для его осуществления
US20040077440A1 (en) Archery bow limb construction with or without built in limb dampeners
US5934424A (en) Centrifugal delayed resonator pendulum absorber
JP2001349094A (ja) 同調振り子式制振装置
US4420134A (en) Vibration isolator with crank driven inertia bar
WO2003060345A1 (fr) Amortisseur massique accorde mettant en oeuvre un hexapode
US6056259A (en) Tuned vibration noise reducer
US2534963A (en) Nutation damper for gyroscopes
Hosek et al. The centrifugal delayed resonator as a tunable torsional vibration absorber for multi-degree-of-freedom systems
Rajamani et al. On invariant points and their influence on active vibration isolation
JPH0228021B2 (ja) Shindokyushusochi
Cosmo et al. Transient dynamics of the tether elevator/crawler system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP