Research on intelligent suspension control strategies under vehicle operating conditions

To address the problem that ride comfort control under braking, lane-change, and road unevenness excitation must simultaneously consider vibration suppression and body attitude stability, this paper proposes a multi-condition coordinated suspension control strategy framework. Under braking conditions, pitch sky-hook control is employed to suppress the pitch angle and pitch acceleration; under lane-change conditions, sliding mode control is employed to suppress the roll angle and roll acceleration. Considering that actual driving conditions are often coupled, a coordinated control strategy with integrated control objectives is further designed based on the above single-condition control, and a control force distribution method based on a quadratic performance index is proposed to coordinate the two attitude control objectives. Under road unevenness excitation, the body acceleration and pitch angle are suppressed while dynamic tire load constraints are imposed to prevent deterioration of tire-road contact. Simulation results under typical braking, lane-change, and random road excitation conditions show that the proposed strategy effectively improves ride comfort and maintains body attitude stability under operating conditions.