A Proposal of Control Method for an Elevator Emergency Stop Device With a Magnetic Rheological Fluid Damper

Author

Uchida, Tomoyuki ; Sato, Seiki ; Nakagawa, T.

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo City Univ., Tokyo, Japan

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

When an elevator emergency stop device is in operation, large deceleration is generated in the elevator cage. Passengers in the elevator cage sometimes get injured, because the deceleration by the elevator emergency stop device is outrageous. Therefore, the authors focused on the passengers´ safety in elevators and proposed an emergency stop device with a spring and a magnetic rheological fluid (MRF) damper, which makes it possible to continuously vary its damping coefficient by controlling the magnetic field. To control the magnetic field, current of a coil surrounding the damper must be regulated. Since this type of emergency stop device is a nonlinear system, a suitable control input must be theoretically formulated. In this paper, a nonlinear controller suitable for MRF damper was designed and its control effectiveness in elevators was confirmed by digital simulations.

Keywords

lifts; magnetic variables control; nonlinear control systems; shock absorbers; vibration control; MRF damper; control effectiveness; control method; damping coefficient; digital simulation; elevator cage; elevator emergency stop device; magnetic field control; magnetic rheological fluid damper; nonlinear system; passenger safety; Acceleration; Coils; Damping; Elevators; Force; Magnetomechanical effects; Shock absorbers; Elevator; emergency stop device; magnetic field; magnetic rheological fluid (MRF); viscosity control with coil current;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2320671

Filename

6971472