Abstract:
A system is provided for supporting a reduction in average waiting time of an elevator group management system, and an evaluation on group management control performance. A forecasted trajectory of each elevator within a predetermined time from a current time point is found and displayed. Also, an evaluation value is calculated for a forecasted interval with respect to a target interval between respective elevators in a predetermined time from the evaluation value, and an elevator is allocated to a generated hall call based on the evaluation value such that the forecasted interval comes closer to the target interval. By displaying the forecasted trajectory of each elevator, it is possible to support the evaluation on the performance of the group management system through clarification of the reason for allocation. Also, the control performance of the group management system is improved, including a reduction in average waiting time, through allocation control close to an ideal one.
Abstract:
In view of the limited effect of the elevator car (12A, 12B, 12C) interval control by hall call assignment alone, depending on generation of hall calls, an elevator group control system and a control method thereof are disclosed, in which the waiting time can be shortened more accurately in finely detailed fashion. A reference trajectory indicating a reference position of each elevator car (12A, 12B, 12C) within a predetermined future time is prepared for each elevator car (12A, 12B, 12C), and a forecasted trajectory corresponding to the reference trajectory is prepared by forecasting the position of each elevator car (12A, 12B, 12C). A hall call is assigned in such a manner that the forecasted trajectory approaches the reference trajectory. At the same time, the operation control factors other than assignment, including the car speed (car speed and acceleration) and the stop time (the door operation speed and the door opening time) of each elevator car (12A, 12B, 12C) are adjusted during the period lacking the assignment process.
Abstract:
PROBLEM TO BE SOLVED: To realize interval control capable of more surely and finely shortening a waiting time because a control effect is limited according to generation of a hall call with an interval control alone by a hall call allocation. SOLUTION: A target route indicating a target position of each of cars relative to a time within a predetermined time after a current time point is created for each elevator, while the position of each of the cars is predicted so as to create a predicted route corresponding to the target route. Hall call is allocated so that the predicted route approaches the target route, and operations other than allocation are controlled, i.e., operation speed (car speed and acceleration), stopping time (opening/closing speed of a door, and opening time) and the like of the elevator are adjusted in a period not having an allocation processing. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A group controller for elevators has predicting/calculating means and assigning means. The predicting/calculating means obtains a predicted in-cage load at the time of departure of the cage from a departure floor and predicts at least one of a cage speed, acceleration, and a jerk rate of the cage according to the predicted in-cage load, obtaining a predicted time of arrival. The assigning means, when a call from a waiting area occurs, selects and assigns a cage that is to respond to the call based on information from the predicting/calculating means.