TH36252A - Methodology for the realization and scaling of speed profiles for elevator cabinet doors. - Google Patents

Abstract

The DC60 methodology for scaling the position-time profile of elevator cabinet doors comprises procedures for generating the time scaling factor and the distance scaling factor. Both scaling factors allow the stored position-time profile to be used for subsequent operations on all elevator cabinet doors.

Claims (11)

1. Methodology for Controlling Elevator Cabinet Door Movement. This methodology comprises the following steps: generating a linear velocity-time profile for the desired door movement; passing this linear velocity-time profile through a low-pass filter to obtain a filtered velocity-time profile; limiting the frequency of this filtered velocity-time profile; combining this filtered velocity-time profile to obtain a position-time profile; storing this position-time profile; retrieving this position-time profile after receiving a command to move the elevator cabinet door; and scaling the position-time profile based on the initial position of the elevator cabinet door and the time required to complete the operation. 2. A methodology consistent with claim 1, whereby the said low-pass filter circuit is a low-pass, limited impulse response filter. 3. A methodology consistent with claim 1, whereby the said low-pass filter circuit is a non-restricted impulse response low-pass filter circuit. 4. A procedure consistent with claim 1 where the location and time profile is stored in RAM. 5. Methodology for controlling the movement of elevator doors. This methodology consists of the following steps: creating a linear speed-to-time profile for the desired door movement, and scaling this speed-to-time profile based on the initial position of the elevator door and the time required to complete the operation. 6. Methodology for scaling the position-time profile for elevator car door movement. This methodology consists of the following steps: Determining the distance scaling factor corresponding to the following equation: (equation), where X is the final target position of the door, X is the door position at the time the command to move the door is received, and X is the total distance of the position-time profile stored for that particular operation. Determining the time scaling factor corresponding to the following equation: (equation), where t is the required time within which the door operation must be completed, and t is the total time of the position-time profile stored for that particular operation. And determining the position reference point to serve as the input signal to the closed-loop feedback control system corresponding to the following equation: (equation). 7. A procedure consistent with claim 6, where the time difference t is set to five milliseconds (5msec). 8. A procedure consistent with claim 7, where (equation) where t is the time held for the operation to be fully completed. 9. Elevator cabin door system for opening and closing elevator cabin doors. This elevator cabin door system consists of: a door controller with software for scaling the position profile against time in order to adapt to the operation of abnormal door conditions. 10. The elevator door system compliant with claim 9, where the distance scaling factor is determined to the value corresponding to the following equation: (Equation) where X is the final target position of the door, X is the door position at the time the command to move the door is received, and X is the total distance of the position profile versus the time stored for a particular operation. The time scaling factor is determined to the value corresponding to the following equation: (Equation) where t is the required time within which the door operation must be completed, and t is the total time of the position profile versus the time stored for a particular operation. The position reference point that serves as the input signal to the closed-loop feedback control system is determined to the value corresponding to the following equation: (Equation) where x is the position reference and serves as the input signal to the control system, the desired position of the door is located at that position, X is the door position at the time the command to move the door is received, X is the door position on the position profile versus the time stored at a specific time t, and K is the distance scaling factor, t is the time for The referenced position X(t) is taken from the position-time profile, t is the previous iteration time, t is the real-time difference between t and t, and k is the time scaling factor. 11. An elevator door system that complies with claim 10, where (equation formula) where t is the time stored for full operation (Clause 11, page 4, figure 5).