Control method and device for actively changing stiffness by inhaul cable vibration

Abstract

The invention discloses a novel method for controlling the active changing rigidity of the vibration of an inhaul cable; a force sensor measures the initial pretension of the inhaul cable, and the measured data of the inhaul cable is sent to a D-V-I Bang-Bang active controller by making use of a displacement transducer and a data wire; the active controller judges and chooses active controlling force and then outputs the force so as to motivate a moving-coil type hydraulic servo actuator to generate dynamic state drawing force along the axial direction of the inhaul cable to lead the inhaul cable to actively change the rigidity, thereby achieving the aim of reducing the vibratory response of the inhaul cable. Devices used for realizing the method comprises the moving-coil type hydraulic servo actuator, a hydraulic station, and D-V-I Bang-Bang active controller; the upper end of the inhaul cable is fixed on a reaction force wall and provided with the force sensor used for measuring the initial pretension of the inhaul cable, and the lower end of the inhaul cable is connected with a puller of the moving-coil type hydraulic servo actuator; the inhaul cable is provided with the displacement transducer which forms a duct pilot together with the D-V-I Bang-Bang active controller and the moving-coil type hydraulic servo actuator by the data wire. The novel method not only can improve the insurance of the structure of the inhaul cable, but also can obtain remarkable comprehensive benefit.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a novel method and device for active variable stiffness control of cable vibration. Background technique [0002] The cable structure has been widely used in civil engineering structures due to its reasonable structure and beautiful appearance. , prone to lateral vibration. Excessive amplitude will cause fatigue fracture of the cable, which affects the safety of the cable structure, and destructive accidents may occur. The method and device can be used to suppress the lateral vibration of the cables in structures such as large cable-stayed roofs, cable-stayed bridges, mast structures, power transmission towers and glass curtain walls. [0003] So far, the engineering field mainly uses various passive control or semi-active control vibration damping devices to reduce the lateral vibration of the cable in the cable structure. Although there are advantages such as simple operation ...

AI Technical Summary

Problems solved by technology

Although there are advantages such as simplicity and ease of installation, etc., the control effect of passive control or semi-active control for the vibration control of super-long cables is far from meeting the actual requirements of the project.

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