Modeling and Analysis of Comfort Braking Control Based on Brake-by-Wire and Active Suspension Systems

As wire control systems advance, they have given rise to a diverse suite of advanced driver assistance services and sophisticated fusion control capabilities. This article presents an innovative strategy for achieving comfortable braking in electric vehicles, propelled by the unwavering goal of enhancing driving experience. By integrating active suspension systems with brake-by-wire technology, the approach ensures that drivers retain their confidence throughout the braking process. The brake-by-wire system adeptly discerns the driver’s braking intent through the pedal’s displacement sensor. Utilizing this technology, we have developed a pioneering function aimed at delivering comfort braking control (CBC). This function not only refines the braking experience but also solidifies the driver’s trust in the braking system. Designed to counteract the head nodding effect during vehicle deceleration, the CBC system minimizes or even eradicates the jarring sensation of pitching for both the driver and passengers. The algorithm detailed in this article has undergone rigorous validation through extensive real-world vehicle testing. The results indicate that the proposed method markedly improves key performance metrics: it enhances the pitch angle by 37.74%, reduces the pitch angle speed by 77.12%, shortens the convergence time by 57.14%, and diminishes the pitch angle peak amplitude by 45.65%, all within a 0.3g braking deceleration scenario. This groundbreaking function has now been successfully implemented in mass production vehicles.