Brake by wire control with pedal feedback and brake boost

Abstract

"By wire" technology merged into multiple vehicular subsystems, including gear changing, drive, and braking systems. The brake by wire system is developed to overcome the problems associated with the integration of mechanical and hydraulic systems in novel vehicular systems. Even though brake by wire systems has potential advantages, the conventional brake systems' tactile sensation will be removed if migrated to the electrical by wire control scheme. This paper proposes a novel control mechanism that provides amplification of force, scaling of position replication, and a virtual spring-damper based pedal retraction which provides bilateral brake force feedback to the driver's pedal similar to the hydraulic brake system. The proposed system performance was simulated and tested using a bilateral teleoperation system with disturbance observers (DOB) and reaction force observers (RFOB). The proposed system provides pedal force amplification and brake force feedback to the driver's pedal using RFOBs. The virtual spring retracts the brake pedal, similar to a mechanical pedal retraction system. The system simulation and experimental results provide evidence of the proposed system's force amplification, position scaling, and pedal reaction capabilities.

Low-cost portable throttle curve manipulator for smooth initial movement of an electric vehicle

“…Previous studies have paid attention to this comfort aspect. Brake-by-wire system is reported in [25], where the hydraulic brake is changed to an electric braking system. Although the brake-by-wire is more efficient compared to the hydraulic brake, the brake does provide a feedback force when the pedal is pressed, unlike the hydraulic brake system.…”

Simplifying the electronic wedge brake system model through model order reduction techniques

“…The wedge mechanism and brake pad parameters are wedge mass (Mw), wedge angle (α), actuation angle (β), calliper stiffness (Kcal), and brake pad coefficient (µ). The DC motor electrical and mechanical dynamics describe by (1) where Im is a motor current, θm is a motor angle, and ωm is an angular speed of a DC motor.…”

“…The electro-mechanical brake (EMB) is the most accurate description of BBW because electronically powered actuators generate the braking force. The EMB has the following advantages: it is noiseless, has a faster response time, is easy to create a control system, and is more ecologically friendly [1]. Most EMBs have an electric motor, a reduction gear, a floating disc brake calliper, and a 24/42 V power supply [2], [3], and consume a lot of energy [4].…”