Self-adaptive dynamic surface control method considering nonlinear active suspension actuator

Abstract

The invention relates to a self-adaptive dynamic surface control method considering a nonlinear active suspension actuator. The self-adaptive dynamic surface control method comprises the following steps: firstly, establishing a two-degree-of-freedom nonlinear active suspension model through a step 1; reasoning a formula required by the self-adaptive dynamic surface controller through the step 2, and carrying out stability certification; and performing controller parameter adjustment and simulation result comparison through the step 3. According to the invention, the nonlinear active suspensionmodel is established; self-adaptive dynamic surface control is adopted, the problem that nonlinear factors in a suspension system and differential explosion caused by multiple derivation in a high-order system cannot be well solved through linear control can be solved, the controller is more beneficial to practical application, a better control effect is achieved, and the method can be applied tothe field of suspension control.

Description

technical field [0001] The invention belongs to the field of automobile dynamic control, in particular to an adaptive dynamic surface control method considering nonlinear active suspension actuators. Background technique [0002] The research of the patent of this invention is a heavy-duty vehicle. Because the actual working environment of the heavy-duty vehicle is relatively harsh and the road conditions are very poor, the harsh working environment aggravates the vibration of the vehicle, and the conventional passive oil-gas suspension cannot be adjusted differently according to different inputs on the road surface. parameters, so that it cannot adapt to different road surfaces. Consider the three indicators that affect the performance of the suspension system: the vertical acceleration of the vehicle body, the dynamic travel of the suspension, and the dynamic and static load ratio. Through the control algorithm, the active suspension can not only reduce the impact of the ...

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Problems solved by technology

[0008] The present invention aims to solve the problem of insufficient control precision caused by the suspension mathematical model being too simple, and establishes a nonlinear active suspension model. The limitations of the backstepping algorithm for high-order systems, the adaptive dynamic surface control method is used, and the simulation control diagram of the control algorithm is given

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