Abstract
The low-frequency and large-amplitude coupled vibration of the support sting in wind tunnel affects the accuracy of the wind tunnel test’s data. An active vibration control system of support sting in wind tunnel is demonstrated using adaptive control method in this paper. Following the establishment of the finite element model, and the extraction of parameter matrix, the original model is reduced to lower-mode model which contains first two pitching modes based on DC gain ranking method. The active control model is proposed based on model reference adaptive control method (RACM) to control the low-frequency vibration of supporting sting in wind tunnel. Research results have justified the effectiveness of the controlled system and provided insight into the practical application of the proposed method.
Highlights
Wind tunnel test is an indispensable part of the designed process of the aircraft, which has played an important role in analyzing the aerodynamic performance of the aircraft under complex flight conditions [1]
Li used the hybrid fuzzy PID control method to control the vibration of the support sting and had the experimental study [9]
The model reference adaptive control method is proposed to control the low vibration of the support sting
Summary
Wind tunnel test is an indispensable part of the designed process of the aircraft, which has played an important role in analyzing the aerodynamic performance of the aircraft under complex flight conditions [1]. The support sting method is applied in the wind tunnel test of the large attack angle of the aircraft because of its simple structure and less interference effects [2]. The passive control method such as damper is used to decrease the vibration of the support sting, but the effect was limited [4]. S. M. designed PID control method based on the output feedback controller, which had a reference value [6]. Li used the hybrid fuzzy PID control method to control the vibration of the support sting and had the experimental study [9]. The model reference adaptive control method is proposed to control the low vibration of the support sting. The vibration suppression effect of the improved adaptive control method is verified by simulation with MATLAB
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