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Publication numberUS3774729 A
Publication typeGrant
Publication dateNov 27, 1973
Filing dateMay 17, 1972
Priority dateMay 17, 1972
Also published asCA993580A1, DE2325140A1
Publication numberUS 3774729 A, US 3774729A, US-A-3774729, US3774729 A, US3774729A
InventorsC Winkler
Original AssigneeWestinghouse Electric Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Speed pattern generator for elevator systems
US 3774729 A
Abstract
A speed pattern generator for elevator control which provides a time dependent speed reference pattern, with control over maximum jerk directly incorporated into the pattern itself. The speed pattern is developed by starting with a step signal whose two magnitudes determine maximum jerk. The specific magnitude of the step signal which is selected, and time spent at each magnitude of the step signal is determined by acceleration and speed feedback circuits. The step or jerk signal is integrated to provide an acceleration signal, and the acceleration signal is integrated to provide a speed pattern signal which, regardless of how fast the elevator system responds thereto, positively limits the maximum jerk.
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Description  (OCR text may contain errors)

Winkler Nov. 27, 1973 SPEED PATTERN GENERATOR FOR ELEVATOR SYSTEMS 3,627,080 12/1971 Yuminaka et a1. 187/29 Primary Examiner Bemard A. Gilheany Assistant Examiner-W. E. Duncanson, Jr. Attorney-A. T. Stratton et al.

[5 7 ABSTRACT A speed pattern generator for elevator control which provides a time dependent-speed reference pattern, with control over maximum jerk directly incorporated into the pattern itself. The speed pattern is developed by starting with a step signal whose two magnitudes determine maximum jerk. The specific magnitude of the step signal which is selected, and time spent at each magnitude of the step signal is determined by acceleration and speed feedback circuits. The step or jerk signal is integrated to provide an acceleration signal, and the acceleration signal is integrated to provide a speed pattern signal which, regardless of how fast the elevator system responds thereto, positively limits the maximum jerk.

17 Claims, 23 Drawing Figures TIMING coRRIooR CALL CONTROt 20 i --{MOTOR||=- TIMING 3 30m LANDING r 62 CAR CALL y CONTROL SWHRHES HATCHWAY H736 55 TIMING; 3 V H3 TO DOOR 2 CAR FLOOR HA'LL 56 DOOR OPERATOR SELECTOR LANTERNS 2nd LANDIN OPERATOR 58 G i [54 OI PFR Pasta L k g 9 J LER GENERATOR 24 50 I J 48 DISTANCE 56 i PULSES' d lsi LANDING PULSE DETECTOR 0 i 64 1Q v-2s 32 Y DE TECTOR Pmmgnunvzmn Q 3774.729

suzsf an or 19 n I uo FLOOR CORRIDOR CALLS CAR CAN CONSIDER WHEN TRAVELLING IN A GIVEN DIRECTION FIG. I l

PATENTEDRHV 27 973 saw 1 HF SPEED 7 DEMAND\ LEVEL FIG. I5B

PAIENIEDunvav ms SHEET 15 0F TIME RAMP GENERATOR DISTANCE SLOW DOWN N A Du T TIME RAMP GENERATOR TIME T EA E K A Wm w R m .s s( E L J E FIG. l6

FIG. 20A I084 VOLTAGE (T) INPLIT To FILTER AMPLIFIER ouTPuT I VOLTAGE V2 0F FILTER v, AMPLIFIER I I086 (VSE) 0 I TIME VOLTAGE (H INPUT TO FILTER AMPLIFIER VOLTAGE OUTPUT OF 2 FILTER VI AMPLIFIER L A I054 O I (VSE) TIME SPSW TOVSP FIG. 20B

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3523232 *Jul 6, 1964Aug 4, 1970Reliance Electric & Eng CoJerk,acceleration,and velocity limited position pattern generator for an elevator system
US3526300 *Aug 6, 1968Sep 1, 1970Inventio AgMethod and apparatus for control of high speed elevator
US3627080 *Sep 15, 1969Dec 14, 1971Hitachi LtdSpeed control system for elevators
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4124101 *Oct 29, 1976Nov 7, 1978Mitsubishi Denki Kabushiki KaishaElevator speed control apparatus
US4150734 *Jan 24, 1978Apr 24, 1979Hitachi, Ltd.Elevator control apparatus
US4155426 *May 5, 1978May 22, 1979Westinghouse Electric Corp.Digital speed pattern generator
US4193478 *Apr 26, 1977Mar 18, 1980Elevator IndustriesElevator control system and method
US4235309 *Oct 18, 1978Nov 25, 1980Schindler Haughton Elevator Corp.Control for starting electric motors
US4261439 *Sep 10, 1979Apr 14, 1981Westinghouse Electric Corp.Elevator system
US4331220 *Nov 4, 1980May 25, 1982Westinghouse Electric Corp.Elevator system
US4337847 *Sep 4, 1980Jul 6, 1982Inventio AgDrive control for an elevator
US4373612 *Nov 25, 1980Feb 15, 1983Westinghouse Electric Corp.Elevator system
US4658935 *Aug 5, 1985Apr 21, 1987Dover CorporationDigital selector system for elevators
US6089353 *Feb 2, 1999Jul 18, 2000Bt Prime Mover, Inc.Material handling vehicle having a stability support
US7228943 *Sep 26, 2002Jun 12, 2007Mitsubishi Denki Kabushiki KaishaElevator apparatus with position correction for overspeed detection
US8459415Aug 4, 2008Jun 11, 2013Otis Elevator CompanyElevator motion profile control including non-instantaneous transition between jerk values
EP0074093A2 *Sep 2, 1982Mar 16, 1983Hitachi, Ltd.Controller for elevator
WO2010016826A1 *Aug 4, 2008Feb 11, 2010Otis Elevator CompanyElevator motion profile control
Classifications
U.S. Classification187/295
International ClassificationH02P3/06, B66B1/30, B66B1/28, B66B1/24, B66B1/16
Cooperative ClassificationB66B1/285
European ClassificationB66B20/00