Development of an Integrated Braking Control Strategy for Commercial Vehicles 2015-26-0080

Commercial vehicle plays an important role during transportation process under the demand of high speed, convenience and efficiency. So improving active safety of commercial vehicle has become a research topic. Due to the fact that braking characteristic is the basic and most closely related to safe driving of vehicle's performances, this paper aims to improve the braking performance by researching into an integrated control method based on the mature ABS products. Firstly, a strategy which gives priority to ABS and differential yaw moment control, complementary with the hydraulic active suspension control is proposed. In comparison with ABS, the combined control of brake system and suspension system is designed not only for preventing wheels lock. But the directional control to avoid roll or spin is more focused on. Then in order to run the novel method correctly, the controlled variables and evaluation criteria are illustrated briefly. Additionally, a complex vehicle model for simulating is constructed and simulations under different conditions are implemented to investigate the effect of integrated control on the braking performances. According to analysis and contrast, the results demonstrate the proposed strategy guarantees the vehicle's lateral and yawing stability reliably and can take large advantage of road adhesion, with the tires' cornering characteristic much better because of the intervention of active suspension. Therefore, when compared to single control, the integrated control improves braking performance significantly, especially the driving safety on extreme conditions.