To address the conflict between damping effectiveness and control energy consumption in active suspension systems,an ideal twin dynamic deflection tracking control strategy for active air suspension systems is introduced.The strategy is founded on the research concept of"digital twins,virtual-to-real control,and energy-efficient damping".Firstly,taking the vehicle seat active air suspension system as an example,a genuine air suspension system's ideal digital twin is formulated using a quasi-zero stiffness system,alongside the development of a parameter matching design methodology for this digital twin.Subsequently,with the air spring gas pressure control as a key point.An outer-loop position fuzzy non-singular fast terminal sliding mode controller and an inner-loop air pressure controller considering the nonlinear flow characteristics of the solenoid valve during air spring inflation and deflation processes are designed to achieve the tracking of the twin body deflection under actual excitations by the real suspension system.Finally,through bench simulation experiments and comprehensive vehicle ride comfort simulations,the efficacy and progressiveness of the proposed control strategy are validated.The results show that,compared to the traditional control strategy aiming at reducing the acceleration,the proposed strategy showcases reduced root mean square values of vertical vibration acceleration of the seat under random road conditions and a reduction exceeding 65.0％in the root mean square value of control energy consumption.Furthermore,under impact road conditions,the vertical vibration amplitude of the seat is diminished,with a maximum reduction in active control force exceeding 45.5％.The proposed strategy significantly outperforms the traditional strategy,effectively enhancing the damping capabilities of the suspension system while markedly significantly reducing the active control energy consumption.This strategy adeptly resolves the aforementioned conflict and can be broadly implemented across various active suspension systems,offering a novel research trajectory for energy-efficient damping.
vehicleair suspensionenergy saving and vibration reductionideal twin dynamic deflection
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