Vibration suppression device for cable-stayed cables for large-scale flexible space structures

Abstract

The invention discloses a cable-stayed cable vibration suppression device for large-scale flexible space structures. The invention can realize the active vibration suppression of the large-scale flexible space structure, and has the advantages of less motor quantity, light weight, small space occupation, low manufacturing cost, easy assembly and larger working space. The device of the present invention comprises: a cable fixing unit, a return cable unit, a support base and a flexible cable; wherein, a motor and a roller are arranged on the return cable unit, and a cable anchor point is arranged on a large-scale flexible structure; one end of the flexible cable is fixed on the On the cable fixing unit, the other end passes through the cable anchor point and is wound on the drum. The invention adopts the under-constrained driving of the flexible cable mechanism to realize the active vibration suppression of the large-size flexible structure, and uses the anchor point to realize the application of multiple concentrated forces, thereby avoiding the use of the second motor and effectively reducing the number of driving motors.

Description

technical field [0001] The invention relates to the technical field of mechanical structure vibration suppression, in particular to a cable-stayed cable vibration suppression device for large-scale flexible space structures. Background technique [0002] Traditional vibration suppression methods for spacecraft structures are mainly passive methods. The passive method is achieved by changing the shape of the structure, utilizing shapes and alloys, and pasting damping sheets. Passive vibration suppression methods generally include: directly setting stiffeners on the control object or changing the structural shape of the control object to increase the local stiffness of the control object; or increasing the local damping of the control object through the arrangement of damping sheets. External circuits or other control devices greatly reduce the complexity of control. [0003] With the development of aviation and aerospace engineering technology, the demand for large-scale fl...

AI Technical Summary

Problems solved by technology

Conventional passive vibration suppression methods have certain limitations: the system parameters of passive suppressors are usually fixed, and because of the inherent "low-pass filter" performance of passive components, they have better performance in high frequency bands. However, the vibration of the flexible structure of the large-scale flexible space structure belongs to low-frequency vibration, and the vibration suppression effect of the conventional passive vibration suppression method is not obvious

However, the high driving voltage (higher than 100V) limits its application in aerospace structures, and its operating frequency is much higher than the natural frequency of large-scale flexible structures, which will reduce its vibration suppression effect

In addition, if it is applied to a large-scale flexible structure, the number of piezoelectric sheets that need to be distributed is extremely large, and for the vibration suppression of large displacements of large-scale flexible structures, the effect of piezoelectric sheets has not been confirmed.

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