Abstract: A rope sway mitigation device for an elevator system includes a rope tension adjuster connected to a plurality of ropes operably connected to an elevator car. The rope tension adjuster is configured to adjust a tension of at least one individual rope of the plurality of ropes thereby mitigating excitation of natural frequencies of the plurality of ropes during sway of at least one component of the elevator system and or a building in which the elevator system is located. Further disclosed is an elevator system including a rope sway mitigation device and a method of rope sway mitigation in an elevator system.

Abstract: An exemplary method of controlling elevator car position includes determining that an elevator car requires re-leveling and determining whether a vibration damper is activated. A gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling is adjusted if the vibration damper is activated.

Abstract: An exemplary device for use in an elevator system includes at least one friction member that is selectively moveable into a damping position in which the friction member is useful to damp movement of an elevator car associated with the device. A solenoid actuator has an armature that is situated for vertical movement. The armature moves upward when the solenoid is energized to move the friction member into the damping position. The armature mass urges the armature in a downward vertical direction causing the friction member to move out of the damping position when the solenoid is not energized.

Abstract: An exemplary device for controlling an elevator car motion profile includes a controller (64) that is programmed to cause an associated elevator car (62) to move with a motion profile that includes a plurality of jerk values (78, 82, 86, 90, 96, 100). The controller (64) is programmed to cause at least one transition (84, 88, 94, 98) between two of the jerk values to be at a non-instantaneous transition rate.

Abstract: An exemplary elevator system includes a first mass that is moveable within a hoistway. A second mass is moveable within the hoistway. A plurality of elongated members couple the first mass to the second mass. At least one damper is positioned to selectively contact at least one of the elongated members if sway occurs. A sensor is associated with the damper. The sensor detects contact between the damper and the at least one of the elongated members. A controller adjusts at least one aspect of elevator system operation responsive to the detected contact.

Abstract: An exemplary elevator system includes a first and second mass moveable within a hoistway. A plurality of elongated members couple the first mass to the second mass and move over a sheave near one end of the hoistway as the first and second masses move within the hoistway. A portion of the elongated members has a first end at the first mass and a second end at the sheave. A length of the portion between the first and second ends decreases as the first mass moves toward the end of the hoistway that includes the sheave. A damper remains in a fixed position relative to the first or second end. The damper includes an impact member that is spaced from the portion of the elongated members during acceptable operating conditions. The impact member contacts the elongated members responsive to lateral movement of the elongated members.

Abstract: An exemplary method of controlling elevator car position includes determining that an elevator car required re-leveling. Elevator car dynamics information associated with a current position of the elevator car is determined. A gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling is adjusted based on the determined elevator car dynamics information.

Abstract: An elevator system (20) includes an elongated member (30, 32, 34) that may sway under certain conditions. An exemplary method of controlling the elevator system (20) includes selectively controlling an elevator car dispatching schedule when a condition exists that is conducive to sway of one of the elongated members (30, 32, 34). The control over the elevator car dispatching schedule controls the time that the elevator car is in a predetermined critical zone while the condition exists such that the time does not exceed a selected amount.

Abstract: A rope sway mitigation device for an elevator system includes a rope tension adjuster connected to a plurality of ropes operably connected to an elevator car. The rope tension adjuster is configured to adjust a tension of at least one individual rope of the plurality of ropes thereby mitigating excitation of natural frequencies of the plurality of ropes during sway of at least one component of the elevator system and or a building in which the elevator system is located. Further disclosed is an elevator system including a rope sway mitigation device and a method of rope sway mitigation in an elevator system.

Abstract: Controlling the movement of elevator cars (22, 24) within a single hoistway (26) prevents the cars from becoming too close while servicing assigned stops. Example control techniques include controlling door operation of at least one of the elevator cars (22, 24) to effectively slow down a follower car or speed up a leader car for increasing a distance between the cars in an area within the hoistway (26) where the cars would otherwise be too close to each other.

Abstract: An exemplary method of controlling elevator car position includes determining that an elevator car requires re-leveling and determining whether a vibration damper is activated. A gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling is adjusted if the vibration damper is activated.

Abstract: An exemplary device for controlling an elevator car motion profile includes a controller (64) that is programmed to cause an associated elevator car (62) to move with a motion profile that includes a plurality of jerk values (78, 82, 86, 90, 96, 100). The controller (64) is programmed to cause at least one transition (84, 88, 94, 98) between two of the jerk values to be at a non-instantaneous transition rate.

Abstract: An elevator system (20) includes an elongated member (30, 32, 34) that may sway under certain conditions. An exemplary method of controlling the elevator system (20) includes selectively controlling an elevator car dispatching schedule when a condition exists that is conducive to sway of one of the elongated members (30, 32, 34). The control over the elevator car dispatching schedule controls the time that the elevator car is in a predetermined critical zone while the condition exists such that the time does not exceed a selected amount.

Abstract: An exemplary method of controlling elevator car position includes determining that an elevator car required re-leveling. Elevator car dynamics information associated with a current position of the elevator car is determined. A gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling is adjusted based on the determined elevator car dynamics information.

Abstract: An elevator system (20) includes an elongated member (30, 32, 34) that may sway under certain conditions. At least one mitigation member (80) is strategically positioned in a mitigation position corresponding to a location of an anti-node (48, 54, 56, 66, 68, 70) of the elongated member (30, 32, 34) for a given sway condition. In a disclosed example, a controller (38) deploys a mitigation member (80) at a mitigation position for a given sway condition determined by the controller (38). In one example, a plurality of sway mitigation members (80) are strategically positioned at various mitigation positions within a hoistway (26). In another example, a sway mitigation member (80) is selectively moveable within a hoistway (26) between a plurality of mitigation positions.

Abstract: Controlling the movement of elevator cars (22, 24) within a single hoistway (26) prevents the cars from becoming too close while servicing assigned stops. Example control techniques include controlling door operation of at least one of the elevator cars (22, 24) to effectively slow down a follower car or speed up a leader car for increasing a distance between the cars in an area within the hoistway (26) where the cars would otherwise be too close to each other. Disclosed example techniques also include dynamically altering the motion profile of at least one of the cars and adding an additional stop for one of the cars.