On dynamic analysis and control of an elevator system using polynomial chaos and Karhunen-Loève approaches

Colón, Diego; Cunha, Americo; Kaczmarczyk, Stefan; Balthazar, José Manoel

doi:10.1016/j.proeng.2017.09.083

Cited by 10 publications

(9 citation statements)

References 11 publications

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“…Most of the researches about the horizontal vibration active reduction of the elevator car system are based on constant mass and ideal actuator. [9][10][11] However, the change of the quantity of passengers has a great impact on the mass of the car system. In addition, the manufacturing error of guide shoe and safety gear manufactured in the same batch leads to mass uncertainty for the frame on which the counterparts are installed.…”

Section: Introductionmentioning

confidence: 99%

Adaptive sliding mode control with fuzzy adjustment of switching term based on the Takagi-Sugeno model for horizontal vibration of the high-speed elevator cabin system

Jia

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In purpose of reducing the severe horizontal vibration of the high-speed elevator car system which is caused by the excitation of the guide rail, an adaptive sliding mode controller with fuzzy switching gain (FGASMC) is designed in this paper. At first, a 4-DOF active control dynamics model of the horizontal vibration of the elevator car is designed, on which the actuators are symmetrically distributed around the cabin center, and the accuracy of which is demonstrated by experiments. Considering the uncertainty caused by the load conditions, structural mass of the elevator, and the output gain of actuators, a Takagi-Sugeno (TS) model for controlling horizontal vibration of the car system is derived based on the designed 4-DOF dynamics model. Then, based on the TS model mentioned above, an adaptive sliding mode controller (ASMC) for suppressing the horizontal vibration of the car system is designed by a quadratic index method. To ensure the reachability of the sliding mode and keep the chattering smaller, the fuzzy method is utilized to adjust the switching gain of the ASMC. For that, an FGASMC is proposed. Finally, the effectiveness of the proposed controller is verified by MATLAB simulation. The results illustrate that the designed FGASMC can effectively suppress horizontal vibration of the high-speed elevator car system, and the control effect of which is obviously superior than the linear quadratic regulator optimized by genetic algorithm, which provides a new idea for active vibration reduction of high-speed elevator car.

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Section: Introductionmentioning

confidence: 99%

Adaptive sliding mode control with fuzzy adjustment of switching term based on the Takagi-Sugeno model for horizontal vibration of the high-speed elevator cabin system

Jia

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…On the basis of the result of vibration-absorbing insert operation, the authors estimated that the vibration and noise levels were reduced by about 65.49% on the cabin side and by about 90.05% on the counterweight side. The article [19] deals with the quantification of uncertainty in a lift system subjected to lateral vibration induced by guide bumps with and without a feedback control system. A mathematical model of the lift system was derived and a stochastic model for the rail profile irregularities was constructed.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the technical condition of lift guides using a magnetic field

Lonkwic

Krakowski

Ruta

2021

J. Phys.: Conf. Ser.

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The systems that monitor individual components of machines and devices are under constant development. The ability to detect damages at an early stage allows failures to be prevented, so any uncontrolled downtime can be predicted in a controlled manner. Continuous monitoring of technical condition is an activity that also helps to reduce the losses due to equipment failures. However, not all areas can be monitored continuously. Such areas include lift guides where wear and tear can occur naturally, i.e. through abrasion of the material layer due to interaction with moving guide shoes or after emergency braking. Emergency braking causes local damages to the guide through plastic deformation of its surface resulting from indentation of the knurled roller of the brake. Such places are cleaned mechanically, which results in local reduction of the cross-sectional area. In such a case, it is difficult to continuously assess the technical condition of guides due to the prevailing operating conditions. Therefore, a concept of a head enabling assessment of the technical condition of guides at every stage of their operation has been developed. This article presents the novel concept of a magnetic head used for assessing the technical condition of lift guide rails that are the running track of lifting equipment. The initial tests were performed on the original test setup. The concept of the developed measuring head was verified for correct operation on specially prepared flat bars with holes. The results obtained in the form of laboratory tests proved that the proposed measuring head concept can be applied to the measurements under real conditions.

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“…Utsunomiya et al [8] analyzed the vibration spectrum of the guide-rail, which indicated that the disturbance of the rail mainly concentrated in the lowfrequency areas, and there was a main disturbance frequency which was directly proportional to the running speed of the elevator and inversely proportional to the guide-rail length. Colón et al [9] used Karhunen LoèVE and polynomial chaos method to study the dynamic characteristics and control of the horizontal vibration of elevator car caused by rail irregularity through the establishment of the irregular stochastic model of the rail profile.…”

Section: Introductionmentioning

confidence: 99%

Study on horizontal vibration characteristics of high-speed elevator with airflow pressure disturbance and guiding system excitation

Liu

Zhang

et al. 2019

Mechanics & Industry

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This paper aims to study the horizontal vibration dynamic characteristics of high-speed elevator by considering the combined effect of airflow and guiding system. The relationships of lateral force and overturning moment with horizontal displacement, deflection angle displacement and rated speed of the car are mathematically solved, and the horizontal vibration dynamic model of the car under the two excitations is established. For case model, the natural frequency and horizontal vibration response of the car are studied, and the guide-rail excitation frequency and car natural frequency are compared and analyzed. The results indicate that the higher the rated speed is, the more obvious the resonance phenomenon between the guide-rail and car will be in a certain range; the effect of airflow on horizontal vibration acceleration of the car with a speed lower than 6 m/s is small, but when the speed is over 6 m/s, the airflow will greatly affect the single-peak value of horizontal vibration acceleration, which is approximately a quadratic relationship; the deflection angle displacement has an increasing influence on horizontal vibration dynamic response with the increasing speed. The conclusions provide a theoretical guidance for the research and control on the horizontal vibration of high-speed elevator.

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On dynamic analysis and control of an elevator system using polynomial chaos and Karhunen-Loève approaches

Cited by 10 publications

References 11 publications

Adaptive sliding mode control with fuzzy adjustment of switching term based on the Takagi-Sugeno model for horizontal vibration of the high-speed elevator cabin system

Adaptive sliding mode control with fuzzy adjustment of switching term based on the Takagi-Sugeno model for horizontal vibration of the high-speed elevator cabin system

Assessment of the technical condition of lift guides using a magnetic field

Study on horizontal vibration characteristics of high-speed elevator with airflow pressure disturbance and guiding system excitation

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