Study on Active Vibration Control for High-Speed Elevators
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In this article, the H-infinity controller was reduced to a P controller, which can reduce the maximum amplitude of vibrations of a car with active control system to almost half the vibration amplitude without control.Abstract:
When elevators travel at high speed, horizontal vibrations of the car tend to occur due to guide rail deformations, deteriorating ride comfort. Therefore, several active control systems have been developed to reduce these vibrations. These systems consist of six actuators, which independently move the guide rollers. To reduce costs and installation time, it is necessary to develop a system with a minimum number of actuators and a simplified controller. We developed a system with only three actuators. The controller incorporates an H-infinity control design method for maintaining stability of the system when there is a change in load. Furthermore, from a practical point of view, it is important to reduce the order of the controller so that the time for on-site parameter tuning can be reduced. Therefore, we reduced the H-infinity controller to a P controller. We demonstrated that the maximum amplitude of vibrations of a car with active control system can be reduced to almost half the vibration amplitude without control.read more
Citations
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On nonlinear horizontal dynamics and vibrations control for high-speed elevators
TL;DR: In this paper, the horizontal nonlinear response of a three-degree-of-freedom vertical transportation model excited by guide rail deformations is investigated, and the equation of motion contains nonlinearly linear responses.
Journal ArticleDOI
Intelligent control of active shock absorber for high-speed elevator car:
TL;DR: The result shows that the active shock absorber designed in this study can effectively suppress the horizontal vibration of high-speed elevator car, better than traditional proportional–integral–derivative controller.
Journal ArticleDOI
Analysis of Transverse Vibration Acceleration for a High-speed Elevator with Random Parameter Based on Perturbation Theory
TL;DR: In this article, the acceleration response of high-speed elevators was analyzed by solving the random response of expression and comparing the coefficients of various parameters of the random part, and the results showed that the randomness of the geometrical parameters had the greatest influence on transverse acceleration.
Journal Article
Active control strategy of high-speed elevator horizontal vibration based on LMI optimization
TL;DR: A H2/generalized H2 hybrid control strategy is proposed, which attributes the control law of car system to solving the semi-definite programming problem with LMI constraints, and can effectively suppress the horizontal vibration of high-speed elevators.
Journal ArticleDOI
Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property
TL;DR: In this article, an energy-based vibration model (EVM) is proposed to describe the multi-directional coupling properties of high-speed elevators, which combines the kinematic energy, elastic potential energy and virtual works.
References
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Journal ArticleDOI
Vibration Control of High-speed Elevators Taking Account of Electricity Consumption Reduction
Journal ArticleDOI
Estimation of Dynamic Characteristics of an Elevator Car Using Operational Modal Analysis
TL;DR: In this article, the stiffness coefficients of an elevator car were estimated based on the operational modal analysis in the frequency range up to 4 Hz, where the assumption that the car behaves rigidly is satisfied.
Journal ArticleDOI
Horizontal Vibration Suppression Method Suitable for Super-High-Speed Elevators
TL;DR: In this article, an active damping control method suited to super-high-speed elevators is described, which suppresses vibrations by generating only enough magnetic force needed to suppress them only when vibrations of the car frame are produced.