基于模糊调权的升力高速列车混合阻尼悬挂控制模型OA

After being equipped with lift wings,the aerodynamic lift force on the high-speed train during operation is significantly increased.However,when passive suspension is adopted,the dynamic performance of the train deteriorates significantly.In order to improve the operational safety and ride comfort,and solve the problem of exceeding-limit dynamic indicators,this study proposed a semi-active control method for the suspension system.A hybrid ceiling-floor damping controller(HCFDC)model was established.Then,a fuzzy control(FC)method was introduced to optimize the controller,enabling adaptive regulation of weight coefficients in hybrid damping through FC technology.The dynamic performance of the high-speed train equipped with lift wings and controlled by semi-active suspension under main operating conditions at 400～500 km/h was simulated and analyzed.Changes in dynamic performance indicators before and after optimization were compared,analyzed and summarized.Results are drawn as follow.For the FC-optimized HCFDC,the problems of excessive lateral axle force,derailment coefficient,and wheel load reduction rate under crosswind conditions are resolved.At speeds of 400 km/h,each index has decreased by 32.75%,37.50%,and 23.75%,respectively.At 500 km/h,the decreases are 36.56%,33.34%,and 29.89%,respectively.Train stability and ride comfort are improved.Additionally,the exceeding-limit problem of the rate of wheel load reduction for trains at 500 km/h under meeting conditions is resolved,significantly enhancing safety without substantially compromising running stability.This model can effectively control the suspension system of lift-wing-equipped high-speed trains,resolve exceeding-limit dynamic indicators,and improve operational safety while maintaining running stability without significant degradation.The results can provide a reference for further optimization of the dynamic performance of high-speed trains with lift wings.