Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-07-16
1994-03-15
Voeltz, Emanuel T.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187100, 187 95, 187134, B66B 702, B66B 144
Patent
active
052947572
ABSTRACT:
A method and apparatus for actively counteracting a disturbing force acting on a platform moving vertically in a hoistway is disclosed. A manifestation of the disturbing force such as rotational acceleration or translational accelerations indicative thereof is sensed and counteracted, for example, by effectively adding mass to the platform in proportion to the sensed acceleration. The rotations of the platform may be about a vertical axis, one or more horizontal axes or equivalents thereof. Counteraction may but need not be accomplished using an electromagnet actuator for actuating the platform in response to a control signal from a control means which is in turn responsive to the sensed signal. Whatever type of actuator is used, it may be used as well to bring the platform to rest with respect to a hoistway sill prior to transferring passengers. The control means may be analog or digital or a combination of both. A preferred analog-digital approach is disclosed in which the digital part is responsive to accelerometer signals, the analog part is responsive to a force command signal from the digital part and provides a position feedback signal in return. In a preferred embodiment, four electromagnet actuators are situated near the bottom of the platform. Each actuator may act along a line which intersects the walls of the car at a forty-five degree angle. A single axis embodiment is also disclosed.
REFERENCES:
patent: 3099334 (1963-07-01), Tucker et al.
patent: 3669222 (1972-06-01), Takamura et al.
patent: 3939778 (1976-02-01), Ross et al.
patent: 4167296 (1979-09-01), Dendy
patent: 4215403 (1980-07-01), Pollard et al.
patent: 4621833 (1986-11-01), Soltis
patent: 4625993 (1986-12-01), Williams et al.
patent: 4750590 (1988-06-01), Otala
patent: 4754849 (1988-07-01), Ando
patent: 4770438 (1988-09-01), Sugasawa et al.
patent: 4809179 (1989-02-01), Klinger et al.
patent: 4849666 (1989-07-01), Hoag
patent: 4882512 (1989-11-01), Andrus
patent: 4892328 (1990-01-01), Kurtzman et al.
patent: 4898257 (1990-02-01), Brandstadter
patent: 4899852 (1990-02-01), Salmon et al.
patent: 4909535 (1990-03-01), Clark et al.
patent: 4912343 (1990-03-01), Stuart
patent: 5020639 (1991-06-01), Michel
patent: 5027925 (1991-07-01), Kahkipuro et al.
patent: 5086882 (1992-02-01), Sugahara et al.
"Development of an Inertial Profilometer", E. L. Brondenburg, et al, ENSCO, Incorporated, Prepared for Federal Railroad Administration, Nov., 1974.
"Inertial Profilometer as a Rail Surface Measuring Instrument" by T. J. Rudd and E. L. Brondenburg, pp. 1-9.
EPO Abstract, Database WPIL, Week 9030, Derwent Publications Ltd., London GB; AN 90-224718 and FI-A-8804830 (Kone Elevator GmbH) Mar. 29, 1990.
Skalski, C. A.; "Performance of Magnetic Suspensions for High Speed Vehicles Operating over Flexible Guideways" from Journal of Dynamic Meas. System & Control, Jun. 1974.
U.K. Pat. Appln GB-2 238 404 A; "Reducing Cage Vibration in Lift", Hitachi Ltd, Applicant, publ. May 29, 1991.
"A Magnetic Bearing Control Approach using Flux Feedback" by N. Groom, published Mar. 1989 in NASA Technical Memorandum 100672.
NASA Tech Briefs, "Flux-Feedback Magnetic-Suspension Actuator" Publ. Jul. 1990, pp. 44-45.
Popular Science, Sep. 1990 "Riding on Electrons" by Don Sherman pp. 74-77.
Hollowell Richard L.
Salmon John K.
Skalski Clement A.
Traktovenko Boris G.
Maguire, Jr. Francis J.
Nappi Robert
Otis Elevator Company
Voeltz Emanuel T.
LandOfFree
Active vibration control system for an elevator, which reduces h does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active vibration control system for an elevator, which reduces h, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active vibration control system for an elevator, which reduces h will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1537253