Теоретические основы оптимального двухступенчатого регулирования жесткости подвески транспортного средства в цикле колебаний

Abstract

The article dwells upon the issues of control of suspension stiffness of transport vehicle in oscillation cycle. This article describes the methods of stiffness change of suspension and identifies two principal schemes of two-step stiffness change of suspension: a suspension with constant step stiffness and a suspension with variable step stiffness. Mathematical models of suspensions with a two-step stiffness control in a single mass oscillating system have been developed for each of the two principal schemes of stiffness control. Having employed the maximum principle of L.S. Pontriagin, the algorithms for the optimal suspension stiffness control have been determined. In particular, it has been found that when the oscillating system is unbalanced with the subsequent absence of the external force and kinematic action, any stiffness switching, even chaotic one, results in a decrease in the motion amplitudes of the sprung mass and oscillation damping. The optimal control algorithm in case of kinematic disturbance of the oscillating system is an algorithm at which the activation of suspension step with a higher stiffness occurs during the change in direction of suspension deformation. and the system switches to the lower stiffness during the change in direction of motion of the sprung mass