Active vibration abatement device of supporting rod type wind tunnel model
A vibration-suppressing, strut-type technology, used in measuring devices, aerodynamic tests, instruments, etc., can solve problems such as damage to strut structure, stress concentration, and bulky volume, and achieve improved reliability, strong versatility, and improved performance. The effect of maximum angle of attack
Inactive Publication Date: 2014-01-01
DALIAN UNIV OF TECH
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Problems solved by technology
This device effectively suppresses the vibration of the model, and increases the maximum angle of attack of a certain type of transport aircraft from 6° to 12°. However, the device is bulky and only suitable for thicker struts, and damages the strut structure, which is likely to cause stress concentration and destroy
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[0009] The implementation of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings. The active vibration suppression device is the executive component, and the deformation generated by the four orthogonally distributed piezoelectric actuators offsets the deformation generated by the wind tunnel strut. The specific implementation includes the installation of the active vibration suppression device and the control of the four piezoelectric actuators in the device.
[0010] see figure 1 and figure 2 , first place the piezoelectric actuator 5 on the actuator installation platform a, and fix it in the threaded hole at the bottom of the piezoelectric actuator 5 with the screw 4, screw the concave end set screw 6 into the other end of the jacket 1 , so that the concave end of the concave end set screw 6 is in close contact with the output end ball b of the piezoelectric actuator, and a certain value of torque ...
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The invention provides an active vibration abatement device of a supporting rod type wind tunnel model, belongs to the field of vibration abatement of piezoelectric actuators, and particularly relates to a model supporting rod outer cover device with embedded piezoelectric ceramic laminated piles. The device has the functions of abating model vibration and increasing the maximum experiment attack angle. In the device, the exterior of a supporting rod of the wind tunnel model is sleeved with the active vibration abatement device; a left expansion sleeve and a right expansion sleeve are installed at the left end and the right end of the supporting rod respectively; an outer cover is installed between the left expansion sleeve and the right expansion sleeve; four piezoelectric actuators are evenly distributed and respectively fixed on an inner cavity actuator installing platform of the outer cover by four screws. By the adoption of the active vibration abatement device, vibration abatement of two freedom degrees of pitching and eccentric swing of the model can be achieved, the active vibration abatement device is compact in structure and small in size, vibration of the model in a wind tunnel experiment can be effectively reduced, guarantee is provided for improving reliability of wind tunnel experiment data, safety of the experiment is enhanced, and the probable maximum attack angle of the experiment can be effectively increased.
Description
technical field [0001] The invention belongs to the field of piezoelectric actuators used for vibration suppression. In particular, it relates to a model strut jacket device embedded with piezoelectric ceramic stacks, which has the functions of suppressing model vibration and increasing the maximum attack angle of the experiment. Background technique [0002] Wind tunnel model test is one of the important means to understand the performance of aircraft and reduce the risk and cost of aircraft development in the process of aerospace vehicle development. The rod-type wind tunnel test model is the most common installation form. A slender rod extends into the tail or belly of the aircraft model, and the model is placed in the internal flow field of the wind tunnel. The other end of the rod is installed on a The cantilever structure is formed by fixing the scimitar to change the angle of attack. During the wind tunnel model test, due to the combined effects of airflow pulsation...
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IPC IPC(8): G01M9/04
Inventor 刘巍贾振元姜尓东毕晓丹任宗金
Owner DALIAN UNIV OF TECH