Damping-rigidness-controllable double-freedom-degree vibration active control platform

Abstract

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

Description

technical field [0001] The invention relates to a vibration control platform, in particular to a dual-degree-of-freedom vibration active control platform with controllable damping stiffness. Background technique [0002] Vibration control platforms are widely used in aerospace, civil structures and other fields to achieve vibration control and eliminate damage to structures. At present, vibration control platforms mainly include passive control platforms and active control platforms, but passive control has poor flexibility and poor adaptability to unexpected environments. Due to its strong adaptability and good control effect, the active control platform has become the focus of vibration control research. In the past, vibration control was mainly applied to some energy-dissipating materials and piezoelectric materials, and in most cases, oil damping and rubber damping were used as damping materials. It is inconvenient to control the damping and stiffness of the system, and...

AI Technical Summary

Problems solved by technology

In the past, vibration control was mainly applied to some energy-dissipating materials and piezoelectric materials, and in most cases, oil damping and rubber damping were used as damping materials. It is inconvenient to adjust the damping and stiffness of the system, and the control direction is single.

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