Intelligent Semi-active Control Technology for Flexible Aircraft Landing Gear Based on Improved LSSVM Algorithm
An intelligent semi-active control technology for flexible aircraft landing gear based on im-proved LSSVM algorithm is proposed.The vibration modes of flexible aircraft structures is fully consid-ered and an intelligent semi-active control mechanical model for aircraft landing gear is constructed.Based on the semi-active control of the landing gear structure,a pruning algorithm is used to construct the least squares support vector machine optimization function,making the control process sparse.The gas e-lasticity,oil hole hydraulic damping force,and tire pressure of the dual chamber buffer are calculated,and the nonlinear dynamic characteristics of aircraft landing and taxiing in the dynamic model are analyzed.A quadratic performance index function for the landing gear is constructed,a linear quadratic regulator to de-sign the optimal control structure for the landing gear is used to derive the optimal control law.According to the experimental results,the maximum power output of this technology is 0.9×105 N when the buffer distance is 0.25 m,which is consistent with the actual landing power control effect.The maximum dis-placement is 0.47 m,with only a maximum error of 0.01 m compared to the actual situation,which reduces the vibration response of the aircraft in the balanced position and maintains stable take off and landing.
improving LSSVM algorithmflexibilityaircraft landing gearintelligent semi-active control
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