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A model attitude control and measurement technique for improving quality of wind tunnel dynamic test data
Received date: 2016-02-17
Revised date: 2016-05-23
Online published: 2016-06-07
Motors, reducers, eccentric mechanisms and linear linkage mechanisms combination is commonly adopted by dynamic test equipment in a low speed wind tunnel. The derived problems such as too many linkages and too large mechanical clearance will lead to difficulties in precise control of model motion and model attitude measurement accuracy. A dynamic test equipment employing programmed motor technique is developed to meet the requirements of large transport airplanes for low speed wind tunnel dynamic tests based on the available generic support platform for static tests which can be used for small amplitude dynamic derivatives and large amplitude unsteady aerodynamic characteristics study on a aircraft. The dynamic derivative and large amplitude oscillation tests on some large scaled aircraft model are carried out to acquire the data repeatability and investigate the correlation between dynamic data and static data. Test results indicate that the good repeatability and reasonable change law abstracted from the aircraft dynamic test data can fulfill the demands of large aircraft dynamic tests.
LIU Zhitao , SUN Haisheng . A model attitude control and measurement technique for improving quality of wind tunnel dynamic test data[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(8) : 2426 -2435 . DOI: 10.7527/S1000-6893.2016.0155
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