Device and method for testing vibration performance of basic translation flexible beam

Abstract

The invention discloses a device and a method for testing vibration performance of a basic translation flexible beam and belongs to the vibration test device and the vibration test method. The device comprises an operation platform, a displacement platform, a fixing support, a flexible beam, a piezoelectric thin film sensor, a charge amplifier, a signal analytic system, a computer and a controller, wherein the displacement platform is fixed to the operation platform, the fixing support is arranged in the front of the displacement platform, the flexible beam is fixed to the fixing support, the piezoelectric thin film sensor is attached to the flexible beam, the piezoelectric thin film sensor is connected to the charge amplifier, the charge amplifier is connected to the signal analytic system, the signal analytic system is connected to the computer and the computer is connected to the controller. The method and the device have the advantages that the vibration performance of the flexible structure under the electric drive basic translation condition and the coupling action of the vibration to basic and executive mechanism positioning and stability can be researched, the effect of the vibration performance of the flexible structure on positioning and stability under the basic translation action can be researched and the method and the device are significant for optimization structure and the vibration control of the structure.

Description

technical field [0001] The invention relates to a vibration testing device and method, in particular to a vibration characteristic testing device and method of a basic translational flexible beam. Background technique [0002] The flexible structure has the advantages of compact structure and high reliability, and has a wide range of applications in aerospace, micro-electromechanical systems (MEMS), micro-positioning machinery and other fields. Especially in the field of aerospace technology, large-scale, low rigidity and flexibility are an important development trend of spacecraft structures. Large flexible structures such as space manipulators, as flexible accessories of spacecraft, can complete corresponding space manipulation tasks. Due to the low natural mode, it is easy to generate low-order resonance phenomenon when it is disturbed by the outside world, and it will last for a long time without control. The stability and orientation accuracy of the spacecraft attitud...

AI Technical Summary

Problems solved by technology

For the vibration of flexible accessories attached to spacecraft and flexible actuators that complete high-precision positioning in micro-positioning machines, it is the vibration of flexible structures under the condition of basic motion, and the existing experimental devices and research methods are difficult to truly characterize Its vibration characteristics have certain errors in guiding the optimal design and control of the actual structure

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