Active Control System Applied to Vibration Level Control in High-Speed Elevators

Abstract

This work presents an active control system applied to vibration level reduction in high-performance vertical transport, aiming at improving the passengers’ comfort in high-speed elevators. The control system design includes the use of a Proportional Integral Derivative (PID) control. Three strategies were proposed in order to achieve a 90% reduction in the vibration amplitudes: (I) the consecutive reduction of 90% of the displacements, (II) the consecutive reduction of 90% of the velocity, and (III) the consecutive reduction of 90% of the acceleration. The presentation of these three proposals allows their application for the use of different sensors. The performance of each strategy was evaluated through mathematical modeling and numerical simulations of a vertical transport with 4 degrees of freedom, submitted to excitations arising from rail deformations. Vibration and comfort levels in the cabin were numerically analyzed, taking into account ISO 2631 and BS 6841 standards for elevator lateral acceleration level and comfort level felt by passengers. Numerical simulations showed that the force required to reduce the vibration levels is practically the same for the three proposed strategies. However, strategy (III) – the successive reduction of 90% of acceleration – proved to be more efficient at improving passengers’ comfort level when compared to the other two strategies.

Lateral Vibration Control Strategy of High-Speed Elevator Car Based on Sparrow Search Optimization Algorithm

“…In order to better control the lateral vibration of high-speed elevators and improve ride comfort, this paper first searches for specifications of lateral vibration of high-speed elevators. Existing specifications state that the maximum peak-to-peak value of horizontal vibration during elevator operation should not exceed 0.20 m/s 2 , and the A95 peak-to-peak value should not exceed 0.15 m/s 2 [21][22][23]. Next, a Simulink simulation model is constructed based on the mathematical model of lateral vibration of high-speed elevators mentioned in the second section.…”