Abstract:
An elevator group control apparatus for controlling operations of an elevator system with multiple cars moving within a single elevator shaft with improved efficiency without a collision between the cars. When an elevator-hall call is registered, first and second times at which individual cars are expected to arrive at individual floors where the elevator-hall call is registered are computed. The probability of occurrence of a collision between the cars is computed, determining whether a remaining car in the shaft must be shunted. A shunting floor is designated if necessary.
Abstract:
A method for training a neural network used to estimate for an elevator the remaining response time for the elevator to service a hall call. The training, which results in adjusting connection weights between nodes of the neural network, is performed while the elevator is in actual operation. The method is not restricted to any particular architecture of neural network. The method uses a cutoff to limit changes to the connection weights, and provides for scaling the different inputs to the neural network so that all inputs lie in a predetermined range. The method also provides for training in case the elevator is diverted from servicing the hall call by an intervening hall call.
Abstract:
A group controller for controlling elevator cars in a building having a plurality of floors includes a traffic and traffic rate estimator for providing fuzzy estimates of traffic and traffic rate; an open loop fuzzy logic controller for providing a control parameter in response to the fuzzy estimates of traffic and traffic rate, the open loop fuzzy logic controller having membership functions for fuzzy sets of the control parameter; an adaptive controller for modifying the membership functions of the fuzzy sets of the control parameter in response to an elevator control system output variable; and an elevator dispatcher for controlling the operation of the elevator cars during single source traffic conditions in response to the control parameter.
Abstract:
An elevator system for a multistory structure having a plurality of elevator shafts is shown which includes at least one independently movable elevator car in each elevator shaft. A digital computer with memory is used to control elevator cars including the dispatch of cars from terminal floors. A daily control parameter table in memory identifies a plurality of different methods of scheduling dispatch of elevator cars from terminal floors, groups of floors to be serviced by each elevator car, and cars in a shaft to be coupled for tandem operation. The memory is periodically read for selecting for each elevator car one of said methods of scheduling dispatch and for identifying the group of floors to be serviced by the cars. The selected method of scheduling the dispatch of cars is implemented and cars are limited to servicing the selected group of floors. One method of scheduling dispatch includes obtaining a measure of estimated passenger demand for travel in one direction that is incapable of being met by cars currently in service. A passenger loading threshold limit for travel in the one direction is selected which may range from zero to maximum capacity of the elevator car to be dispatched. When the measure of estimated passenger demand for travel in the one direction that is incapable of being met by cars currently in service equals the passenger loading threshold limit a car dispatch signal is issued for dispatch of a car from the terminal floor. Where a plurality of independently-operated cars are included in a hoistway, operation in either a coupled or decoupled manner is provided.
Abstract:
In an elevator dispatching system controlling the assignment of elevator cars in a building, a method of assigning a multi-deck elevator car includes determining if a crowd exists at a floor in the building; if it is determined that the crowd exists at the floor in the building, determining if two decks of a best elevator car are available; if it is determined that multiple decks of the best elevator car are available, assigning the two available decks of the best elevator to the floor where the crowd exists; wherein, the best elevator car makes one stop for each of the two available decks at the floor where the crowd exists.
Abstract:
A system and method for controlling an elevator group including several elevators and related call devices which controls each elevator in a manner determined by the calls entered and the existing control instructions. When the control system has to decide between two or more control alternatives, a systematic decision analysis is performed by studying the effects resulting from each alternative decision, the effects resulting from each alternative decision, the effects being estimated by simulating by a Monte-Carlo type method the future behavior of the elevator system in the case of each alternative decision. To carry out the simulation, realizations are generated at random for the unknown quantities associated with the current state of the elevator system and for new external future events, and a control decision is made on the basis of the results of the decision analysis.
Abstract:
An elevator system is shown that includes an elevator shaft (12) in building (10) and a plurality of elevator cars (C.sub.1, C.sub.2 and C.sub.3) that are movable up and down within the shaft along vertical axis (20). The elevator cars are independently movable by drive motors (D.sub.1, D.sub.2 and D.sub.3) attached to the cars through hoisting cables (24, 28 and 34). The motors are controlled by motor controllers (MC.sub.1, MC.sub.2 and MC.sub.3) which, in turn are controlled by a computer (62) having as inputs service and destination requests, load weight and car location. Different operating modes are shown (FIGS. 5-8) including one in which serviced floors (F.sub.1 through F.sub.16) are serviced by no more than one elevator car at a time, and the cars travel sequentially from one end floor to the other end floor (FIGS. 5 and 6). Simultaneous servicing of a plurality of different floors is shown (FIGS. 7 and 8) and travel of empty elevator cars to a designated floor without responding to floor calls also is shown (FIGS. 6 and 8). Counterweights (CW.sub.1, CW.sub.2 and CW.sub.3) are attached by cables to the respective elevator cars (C.sub.1, C.sub.2 and C.sub.3), which counterweights travel along a vertical axis (38) laterally displaced from the elevator car axis (20). Shock absorbers (54) are provided for absorbing impact of accidental collision between adjacent counterweights (FIG. 3 ) which shock absorbers include coil springs (58) and dashpots (60).
Abstract:
An elevator control apparatus determines the time required for a call to reach a hall and controls an operation of the car using the obtained estimated travel time. The elevator control apparatus includes an input data conversion unit for converting traffic data, including car position, car direction data, and data regarding car calls and hall calls into data that can be used as input data to a neural network. An estimated travel time operation unit including an input layer is provided for taking in the input data. An output layer is provided for outputting the estimated travel time. An intermediate layer is provided between the input and output layers in which a weighting factor is set. The estimated travel time operation unit comprises a neural network and an output data conversion unit for converting the estimated travel time output from the output layer into data that can be used for a predetermined control operation.
Abstract:
An elevator control system which provide a high transportation efficiency and also provides for equalization of service quality between floors when a large number of passengers located at different floors desire transportation to a common particular floor. Passengers waiting at a lower level floor will first be picked up prior to the elevator moving to the upper level floors so that the passengers at the lower levels will also be able to get on the elevator when there is a large number of passengers who wish to go to a particular floor during a particular time of the day.
Abstract:
An elevator control apparatus determines an estimation of a car's crowdedness based on the a car's crowdedness when the car stops or passes an elevator hall, and controls an operation of the car using the obtained estimated car crowdedness. The elevator control apparatus includes an input data conversion unit for converting traffic data, including a position of the car, a direction of a movement, a car load and calls to be responded, into a form in which it can be used as input data of a neural net, an estimated car crowdedness operation unit including an input layer for taking in the input data, an output layer for outputting the estimated car crowdedness, and an intermediate layer provided between said input and output layers and in which a weighting factor is set, the estimated car crowdedness operation unit constituting the neural net, and an output data conversion unit for converting the estimated car crowdedness output from the output layer into a form in which it can be used for a predetermined control operation.