The Coordinated Control Strategy for Vehicle Longitudinal Speed and Preview Active Suspension

Abstract

To enhance the driving comfort of autonomous vehicles, this paper proposes a collaborative control strategy for longitudinal speed planning and preview-style active suspension. Through adaptive spatiotemporal resampling based on vehicle speed, the influence of the road surface is decomposed into time-domain excitations that match the vehicle speed. A multi-objective optimization model is constructed in the spatial domain to balance driving efficiency and passenger comfort. The optimal longitudinal speed target is planned according to road characteristics, achieving pre-control of vehicle driving comfort. Subsequently, a variable prediction time-domain model predictive controller (VT-MPC) is designed for the active suspension system to adapt to the time-varying characteristics caused by speed fluctuations, ensuring high precision and stability of suspension control and maximizing the vibration reduction performance.