Estimation of Dynamic Characteristics of an Elevator Car Using Operational Modal Analysis

Kobayashi, Shigeyuki; Yoshimura, Teizo; Noguchi, Naoaki; Omiya, Akihiro

doi:10.1299/kikaic.74.548

Cited by 6 publications

(5 citation statements)

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“…where the kinematic energy of the lift car, traction string and tension string at time t are included respectively as the first, second and third term in Equation (6). The traction string bears the gravity and pre-tension of the tension string, as well as the gravity of itself and the lift car.…”

Section: Formulations Of the Vibration Model Based On Energy Analysismentioning

confidence: 99%

“…Further, the influence of cage motion and rope stretch were also considered in [5] to construct a dynamic model for both vibration analysis and prediction. Modal analysis in the operating condition is conducted in [6] for stiffness coefficients estimation through minimizing the summed mode shape and frequency errors between the experiments and the analytical model. A forced vibration differential equation was proposed in [7,8] to model the non-linear characteristics of the rolling guide shoes in consideration of the random perturbation of the guide rails and uncertainty of the car parameters.…”

Section: Introductionmentioning

confidence: 99%

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Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property

Qiu

et al. 2020

Energies

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Vibration of a high-speed elevator is one of the major factors contributing to a safe, stable and comfortable ride. Vibration control and systematic optimization rely on the establishment of an accurate and reliable model. An energy-based vibration model (EVM) is proposed in this paper to describe the multi-directional coupling properties of high-speed elevators. After analyzing the structural and kinematic characteristics, a combination of the kinematic energy, elastic potential energy and virtual works is implemented to describe the vibrational characteristics. The Gaussian precise integration method is implemented to obtain accurate solutions because of the infinite degrees of freedom and the time-varying parameters. An example study is conducted using the KLK2 high-speed elevator. EVM is established to obtain the Max(Pk)/Pk and A95 indices of the X, Y, Z axis vibrational acceleration through simulations. A comparison is proposed between the proposed EVM method, conventional methods based on differential-equation vibration model (DVM) and real prototype experimental data. Results show that the proposed EVM method could achieve more accurate results than the conventional DVM method. Deviations of these indicators are less than 5%, which suggest the efficiency, precision and reliability of the proposed EVM.

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Section: Formulations Of the Vibration Model Based On Energy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property

Qiu

et al. 2020

Energies

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“…In addition, these did not consider the variation of system parameters (Qiu et al, 2020). A study used operational modal analysis to identify the modal parameters of the elevator car and then estimated the stiffness parameters of the elevator car from these parameters (Kobayashi et al, 2008). Some researchers developed a nonlinear model of a rolling guide shoe and analysed the horizontal vibration response under parameter variations and guideway unevenness (Zhang et al, 2019a;Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Suppression of horizontal vibrations in high-speed elevators using active shock absorber to assist traditional damping systems

Ren,

Li,

et al. 2024

JIMSE

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PurposeThis paper aims to design an active shock absorber scheme for use in conjunction with a passive shock absorber to suppress the horizontal vibration of elevator cars in a smaller range and shorter time. The developed active shock absorber will also improve the safety and comfort of passengers driving in ultra-high-speed elevators.Design/methodology/approachA six-degree of freedom dynamic model is established according to the position and condition of the car. Then the active shock absorber and disturbance compensation-based adaptive control scheme are designed and simulated in MATLAB/Simulink. The results are analysed and compared with the traditional shock absorber.FindingsThe results show that, compared with traditional spring-based passive damping systems, the designed active shock absorber can reduce vibration displacement by 60%, peak acceleration by 50% and oscillation time by 2/3 and is more robust to different spring stiffness, damping coefficient and load.Originality/valueThe developed active shock absorber and its control algorithm can significantly reduce vibration amplitude and converged time. It can also adjust the damping strength according to the actual load of the elevator car, which is more suitable for high-speed elevators.

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“…[32][33][34] Resonances in the elevator system can damage devices and intensify the discomfort of the passenger. The identification and analysis of natural frequency [35][36][37] in the elevator system help to avoid resonances.…”

Section: Introductionmentioning

confidence: 99%

The multi-component coupling horizontal vibration modeling technology of the high-speed elevator and analysis of its influencing factors

Zhou

Zhang

Qiu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Horizontal vibration of a high-speed elevator can seriously influence the safety, stability, and ride comfort of the elevator during the operation. The construction of an accurate and robust dynamic model for horizontal vibration is the key to vibration control and suppression. In this article, the modeling and influencing factor analysis of the horizontal vibration of the high-speed elevator car are performed considering multi-component coupling. The rigid flexible coupling of the traction ropes and the elevator car system, the rigid irregularity perturbation generated by the manufacturing and installation errors of the guide rails, and the vibration inconsistency between the elevator car and car frame are considered in the modeling process. Based on the coupling system of the traction rope, elevator car, elevator car frame, guide rails, and rolling guide shoes, the kinematic horizontal vibration equation is established by using the generalized Hamilton’s principle. The solution of the horizontal vibration of the elevator car is derived based on the Galerkin method and MATLAB/Simulink software, and the influence of the perturbation frequency, irregularity perturbation type, and operating velocity on the horizontal vibration of the elevator car is analyzed. The KLK2 high-speed elevator is taken as a case study. Compared with the measured data, the mean absolute percentage error (MAPE) of the proposed model for maximum peak-to-peak (max [Formula: see text]) and [Formula: see text] peak-to-peak ([Formula: see text] [Formula: see text]) of the horizontal vibration acceleration is 6.08% and 5.16%, respectively, while the MAPE of a four degree-of-freedom model for the two is 16.74% and 7.35% and the MAPE of a distributed-parameter model for the two is 10.66% and 6.97%, respectively. The effectiveness of the proposed model is verified.

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Estimation of Dynamic Characteristics of an Elevator Car Using Operational Modal Analysis

Cited by 6 publications

References 0 publications

Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property

Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property

Suppression of horizontal vibrations in high-speed elevators using active shock absorber to assist traditional damping systems

The multi-component coupling horizontal vibration modeling technology of the high-speed elevator and analysis of its influencing factors

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