Vertical-vibration control of elevator using estimated caracceleration feedback compensation
Jun-Koo Kang; Seung-Ki Sul
Industrial Electronics, IEEE Transactions on
Volume 47, Issue 1, Feb 2000 Page(s):91 - 99
Digital Object Identifier 10.1109/41.824130
Summary:In this paper, a vibration suppression strategy is proposed for
improving the riding comfort of an elevator, using car acceleration
feedback compensation. The vertical vibration of a lift car is mainly
caused by the resonance of elastic ropes between the car and the sheave,
and the resonant frequency of the system is dependent upon both
passenger load and lift position. To suppress the vibration of a lift
car, the car velocity or acceleration is needed, but only a sheave
velocity is measurable in a practical situation. The proposed method
applies an extended full-order observer for the simultaneous estimation
of car acceleration and the identification of mechanical parameters.
Acceleration feedback compensation is used for the vibration suppression
control. Experimental evaluation has been performed with a 30 kVA
insulated gate bipolar transistor inverter and a medium-speed elevator
system in an elevator test tower. Computer simulated and experimental
results prove the feasibility of the proposed vertical-vibration
controller
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