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This article, written by doctoral student Yu Liangyao from Tsinghua University, was published in the latest issue of the *Journal of Mechanical Engineering*. The piece, titled *"Evaluation and Test of Hydraulic System Performance in Anti-lock Braking System"*, explores the performance of hydraulic actuators through simulation and experimental data. It identifies key factors that influence the control effectiveness of the anti-lock braking system (ABS) and proposes critical evaluation parameters for the hydraulic system, along with specific quantitative values. These findings provide a solid foundation for the integration of ABS with vehicle braking systems, offering practical guidance for engineers working on automotive safety technologies.
With the rapid growth of China's automotive industry, there has been an increasing demand for advanced electronic control systems. However, progress in this area has been relatively slow. As a crucial component of vehicle dynamics control, ABS plays a vital role in enhancing braking efficiency while maintaining steering control during emergency stops. This makes it an essential safety feature in both passenger cars and commercial vehicles.
In 2002, the National Natural Science Foundation of China funded its first project on automotive active safety—*"Research on the Control Method of Anti-lock Braking System Based on Brake Dissipated Power."* The project received second-round funding and, from January 2002 to December 2004, the research team successfully developed an ABS system with independent intellectual property rights, including the core electronic controller and hydraulic actuator. This breakthrough broke foreign companies' monopoly in the market. By the end of 2004, the system was commercialized on a large scale, marking a milestone in China’s automotive electronics industry. The project also won the prestigious Automotive Industry Science and Technology Progress Award in 2005.
Building on the success of the earlier ABS research, the Natural Science Foundation re-funded the project *"Research on Vehicle Dynamics Control Method Based on Driver's Driving Intention Recognition"* starting in 2006. This new initiative expanded the scope of vehicle dynamics control, covering areas such as Traction Control System (TCS), Active Yaw Control (AYC), and eventually integrating them into the Dynamic Stability Control System (DSC), commonly known as ESP. This evolution represents a significant step forward in intelligent and safe vehicle control technologies.