Wheel-Slip Control of a Passenger Vehicle Using an Electrorheological Valve Pressure Modulator

Abstract

This paper presents a wheel slip control for the anti-lock brake system (ABS) of a passenger vehicle using a controllable electrorheological (ER) valve pressure modulator. As a first step, the principal design parameters of the ER valve and hydraulic booster are appropriately determined by considering the braking pressure variation during the ABS operation. An electrically controllable pressure modulator is then constructed and its pressure controllability is evaluated empirically. Subsequently, a quarter-car wheel slip model is established and integrated with the governing equation of the pressure modulator. A sliding mode controller to achieve the desired slip rate is then designed and implemented via the hardware-in-the-loop simulation (HILS). Braking control performance and road transition control response are evaluated and presented in the time domain.