A Computationally and Data-Efficient Reference Slip Estimation Algorithm for Antilock Brake System

An Antilock Brake System (ABS) operating on the principle of wheel slip regulation requires real-time values of reference slip during emergency braking. This reference slip should be obtained while ensuring the computational efficiency and performance of ABS on an Electronic Control Unit (ECU). This study proposes an algorithm for reference slip estimation that is inherently adapted to work with a current automotive-grade ECU. The proposed algorithm utilized linear interpolation, recursion, and function approximation to improve the design of an existing optimal reference slip algorithm. The improved ABS was found to perform equally or better in terms of braking distance when compared to its computationally heavier version across various vehicle operating conditions. Moreover, it was able to run on an automotive-grade ECU in less than 5 ms, which illustrates its deployment readiness.