Otis Elevator Co. leads, with a 23 percent share, but Hitachi Ltd. and Hyundai Elevator Co. are looking to make names for themselves by breaking elevatorspeed records.
虽然奥的斯公司以23%的市场份额领先，但日立和现代公司希望通过打破运行速度最高纪录来脱颖而出。
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This paper presents three modeling of the elevatorspeed control. Elevatorspeed control based on the principle of absolute surplus distant is used to optimize speed control.
Elevatorspeed curve is discussed in this paper. An adaptive control strategy based on neural network is presented. A practical case was given to show the feasibility, practicality and reliability.