Dynamic Coordinated Control for Regenerative Braking System and Anti-Lock Braking System for Electrified Vehicles Under Emergency Braking Conditions

Abstract

The economy of electrified vehicles can be improved by using the motor to recover the energy released during braking. However, the vehicle's regenerative braking system (RBS) and anti-lock braking system (ABS) are not compatible, so the energy dissipated during braking cannot be recovered under emergency braking conditions. This paper employs the method of logic threshold control combined with phase plane theory to analyze the relationship between the slip rate and the braking torque during the ABS braking process and to obtain the composition rule of the braking torque required for ABS braking. Based on this rule, a control strategy to coordinate RBS and ABS when triggering ABS is proposed to improve the efficiency of braking energy recovery. Furthermore, a comparative simulation is conducted to analyze the braking performance of electrified vehicle on roads with different adhesion coefficients by adopting the proposed control strategy and the traditional control strategy. The results show that, compared with the traditional coordinated control strategy, the braking energy recovery efficiency of the proposed coordinated control strategy is improved by 23.08%-38.54%, and can effectively shorten the braking distance and braking time, with better braking performance. Therefore, this paper offers a useful theoretical reference to the design of RBS and ABS coordinated control strategies for electrified vehicles. INDEX TERMS Anti-lock braking system, Coordinated control strategy, Energy recovery, Regenerative braking.

Active motor damping strategy for driveline vibrations of a hybrid electric vehicle during ABS operation

“…However, this reliable estimation result encourages ABS tire slip regulation to be directly supported by the electric motor side as well, supporting findings of recent literature in this research area. 12–14…”

“…x 4 is obtained by taking the time derivative of equation (12), and substituting equation ( 1) into this equation.…”

“…In addition to the aforementioned studies that focus on minimization of the half shaft torque by minimizing the angle of twist and/or the shaft wrap angular speed during acceleration or mild braking, there are also studies in literature that focus on controlling the electric motor during ABS braking. [8][9][10][11][12][13][14] In all these studies, the net desired wheel torque is supplied by blending the hydraulic brake torque and the electric motor torque. In other words, electric motor torque and hydraulic brake torque are controlled simultaneously for tire slip regulation.…”

Control Strategy of Dual-Winding Motor for Vehicle Electro-Hydraulic Braking Systems

“…The brake pedal and wheel calipers are separated from the EHB system to generate pedal force feedback, providing a pedal feel that is independent of the operating environment of the brake system. In addition to operator comfort, the EHB enables the continuous control of each caliper pressure [8,9]. EHB systems, as opposed to typical braking systems using vacuum boosters, allow for faster response times and smaller sizes [10].…”

Fault Detection and Fault Tolerant Control for Anti-lock Braking Systems )ABS) Speed Sensors by Using Neural Networks

“…However, a core control for ABS is the relative slip computation accuracy, which in turn mainly depends on the measurement of two-speed sensors. These are vehicle speed and wheel speed sensors [10].…”