TOKYO, February 7, 2019 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today that it has developed a device that passively controls rope sway when high-rise building elevator sway due to strong winds or long-period earthquakes. By enabling elevators to continue operating under such conditions, the new device will help to stabilize elevator operations and contribute to greater user convenience.
Mitsubishi Electric's new passive rope-sway control device applies a magnetic force, called negative stiffness, to the bottom-end of the rope. Negative stiffness is a well-known principle, and it applies a force in the opposite direction against a normal spring's restoring force.
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