Title :
Vertical-vibration control of elevator using estimated car acceleration feedback compensation
Author :
Kang, Jun-Koo ; Sul, Seung-Ki
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
2/1/2000 12:00:00 AM
Abstract :
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
Keywords :
acceleration control; compensation; feedback; insulated gate bipolar transistors; invertors; lifts; observers; resonance; vibration control; 30 kVA; acceleration feedback compensation; car acceleration estimation; elastic ropes resonance; elevator; elevator test tower; extended full-order observer; insulated gate bipolar transistor inverter; lift car vertical vibration; lift position; mechanical parameters identification; medium-speed elevator system; passenger load; riding comfort; sheave velocity; vertical-vibration control; vibration suppression control; Acceleration; Accelerometers; Elevators; Feedback; Pulleys; Resonance; Resonant frequency; Velocity measurement; Vibration control; Vibration measurement;
Journal_Title :
Industrial Electronics, IEEE Transactions on