学术报告:Stochasticresponsesandvibrationcontrolofanaerodynamicsystemwithrandomloads_bet 365体育官方网站 学术报告:Stochasticresponsesandvibrationcontrolofanaerodynamicsystemwithrandomloads_bet 365体育官方网站

时    2020年1月6日上午 1000~11:00

地    春晖楼914会议室

报 告 人许勇 教授(西北工业365)

 

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报告摘要:In this talk, we will present our recent works about stochastic responses and vibration control in a two degree-of-freedom (TDOF) typical airfoil model, with different random disturbances. Many uncertain fluctuations always exist in the practical environment, such as atmospheric turbulence, pressure fluctuation, random wind loading etc. Thus, taking uncertain fluctuations into account in the aircraft design is extremely important. In our works, three kinds of random loading, including the Gaussian white noise, Gaussian colored noise and narrow-band noise are considered respectively to establish the random airfoil model. Besides, several methods such as stochastic averaging technique, perturbation approach and the method of multiple scales are developed to realize theoretical analysis for the proposed model. We uncover that the obtained approximate analytical solutions are in excellent agreement with the numerical solutions. More interestingly, stochastic jump phenomenon can be observed, which can influence the aircraft performance. Therefore, a sliding mode control scheme is employed to achieve the vibration control of the random airfoil model.

 

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