Cable-stayed rope vibration suppression device for large-size flexible space structure

Abstract

The invention discloses a cable-stayed rope vibration suppression device for a large-size flexible space structure. Active vibration suppression of a large-size flexible space structure can be achieved, the number of motors is small, the weight is light, the occupied space is small, the manufacturing cost is low, assembling is easy, and the larger operation space is achieved. The device comprisesa cable fixing unit, a cable outlet and return unit, a supporting base and a flexible cable. The cable outlet and return unit is provided with a motor and a roller, and the large-size flexible structure is provided with a cable anchor point; and one end of the flexible cable is fixed on the cable fixing unit, and the other end of the flexible cable penetrates through the cable anchor point and iswound on the roller. Active vibration suppression of a large-size flexible structure is achieved through under-constrained driving of the flexible cable mechanism, application of multiple concentratedforces is achieved through the anchor point, so that use of a second motor is avoided, and the number of driving motors is effectively reduced.

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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