Abstract:
A method includes recording a primary destination dispatch request from a primary passenger at a first floor position via a destination dispatch controller 115, identifying a terminal floor, providing a terminal floor call signal to the elevator control system via an overlay controller 110, moving an assigned elevator car in a travel direction of the terminal floor, recording at least one secondary destination dispatch request from a secondary passenger at a respective at least one secondary floor position via the destination dispatch controller, approximating a position of the assigned elevator car, determining a target floor position via the destination dispatch controller, entering a target floor call corresponding to the target floor position at a calculated time to stop the assigned elevator car at the target floor position, cancelling all pending calls via the elevator control system 102, and entering at least one recorded destination dispatch request to the elevator control system.
Abstract:
There is provided an elevator group control system, in which even after an assigned car has been determined, the assigned car can be changed as necessary, and therefore comfortable service can be offered to a user. This group control system includes a call registration device by the use of which a user registers a hall destination call before getting into a car, a car position detection part for detecting the car position of each elevator, and a call registration storage part for storing, for each elevator, a hall destination call having been registered. When a hall destination call having the same contents as those of an already registered hall destination call stored in the call registration storage part is registered newly from the call registration device, if a non-assigned car has already arrived at the floor on which the call registration device is installed, the newly registered hall destination call is assigned to the non-assigned car.
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 employing a micro-processor-based group controller (FIG. 2) communicating with the cars (3, 4) to assign cars to hall calls based on a Relative System Response (RSR) approach. However, rather than using unvarying bonuses and penalties, the assigned bonuses and penalties are varied using "artificial intellience" techniques based on combined historic and real time traffic predictions to predict the number of people behind a hall call, and, calculating and using the average boarding and de-boarding rates at "en route" stops, and the expected car load at the hall call floor. Prediction of the number of people waiting behind hall calls for a few minute intervals are made using traffic levels measured during the past few time intervals on that day as real time predictors, using a linear exponential smoothing model, and traffic levels measured during similar time intervals on previous similar days as historic traffic predictors, using a single exponential smoothing model. The remaining capacity in the car at the hall call floor is matched to the waiting queue using a hall call mismatch penalty. The car stop and hall stop penalties are varied based on the number of people behind the hall call and the variable dwell times at "en route" stops. The stopping of a heavily loaded car to pick up a few people is penalized using a car load penalty. These enhancements to RSR result in equitable distribution of car stops and car loads, thus improving handling capacity and reducing waiting and service times.
Abstract:
A method for assigning hall calls to a plurality of elevator cars on the basis of the estimating the time of arrival (ETA) of each elevator car at the floor of the hall call to be assigned. A new hall call is assigned to the car having the lowest ETA. A previously assigned hall call is reassigned to a car having a lower ETA than the car presently assigned to serve the call when the lower ETA is lower by a value T. The average call waiting time (AWT) is calculated using a selected period of time to tabulate the number of calls and cumulative call waiting time, and this calculated value is compared with the desired AWT for the elevator system. The value of T is changed when the calculated and desired values of ETA have a predetermined relationship.