A testing device and testing method for translational direct impedance of a vibration isolator

Abstract

The invention discloses a test device and a test method for the translational direct impedance of a vibration isolator, and relates to the technical field of vibration isolation, comprising a bench, a force measuring device, a one-way acceleration sensor, a three-way acceleration sensor and a vibration excitation device, The force-measuring device includes a lower-end force-measuring device and an upper-end force-measuring device. The lower-end force-measuring device is arranged on the bench, the upper surface of which is connected to the bottom surface of the vibration isolator to be measured, and one end of the upper-end force-measuring device is connected to the vibration isolator to be measured. The other end is connected with the vibration excitation device; the one-way acceleration sensor is arranged on the upper surface of the lower end force measuring device; the three-way acceleration sensor is fixed on the tested vibration isolator; the device can not only obtain the translation of the three-way translation independent vibration isolator Direct impedance also improves the upper limit frequency of impedance test and simplifies test conditions and procedures, with low cost and high efficiency.

Description

technical field [0001] The invention relates to the technical field of vibration isolation, in particular to a testing device and testing method for the translational direct impedance of a vibration isolator. Background technique [0002] The translational direct impedance of the vibration isolator (the excitation direction and the vibration response direction are in the same direction) is an important parameter to describe the dynamic characteristics of the vibration isolator, and obtaining this parameter is an important part of calculating the transfer characteristics of the vibration isolator. Among them, the translational direct impedance parameters of the three-way independent vibration isolator (the vibration response of the excitation direction is much larger than the response of the other two directions orthogonal to this direction) are mainly clamped on the impedance platform through the vertical and Obtained by the reverse method, it needs to meet the vibration blo...

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Problems solved by technology

Among them, the translational direct impedance parameters of the three-way independent vibration isolator (the vibration response of the excitation direction is much larger than the response of the other two directions orthogonal to this direction) are mainly clamped on the impedance platform through the vertical and Obtained by the reverse method, it needs to meet the vibration blockage condition of the output end during the mechanical impedance test, but the requirement of the vibration blockage condition is that the mass of the impedance platform is large enough, and when the density is constant, the large mass will cause the frequency to drop, which will make The upper limit frequency of the test is limited, which makes it impossible to measure the translational direct impedance parameters of the high-frequency vibration isolator, and there are problems such as high cost of the impedance platform and difficult test conditions. The direct impedance parameter is unfavorable

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