Ibooster f3 driver#

When the braking system fails, it must possess fault tolerance and redundant backup for safety consideration.

Ibooster f3 driver#

Whether in the mature L2 level ADAS (Advanced Driver Assistance System) or advanced driverless-support automation level (元, L4, and L5), the brake-by-wire system is necessary for vehicular motion control. The decoupled systematic scheme of the BBW system is applicable to achieve regenerative braking, wheel slip control, and vehicle stability control, etc. The BBW system is an electronic control system that replaces mechanical and hydraulic connections with wires and electric actuators, converting braking pedal commands from the driver into electronic signals that are to be processed via the in-vehicle communication network, thereby generating control signals to promote the electromechanical actuators for the desired operation. The test results of typical braking scenarios verify the feasibility and effectiveness of the DREHB system, and the hydraulic pressure response as 28.0 MPa/s and tracking error within 0.15 MPa and the desirable fail-safe braking ability fully meets the requirements of higher braking safety and efficiency.Ĭompared with the traditional braking systems, the brake-by-wire (BBW) system applied to autonomous electric vehicles must have an active braking capability. The prototype of the DREHB was tested in hardware-in-the-loop experiments.

The matching and optimization of selected key parameters of the electric boost master cylinder and the linear solenoid valve were conducted using computer-aided batched simulations with a DREHB system modeled in MATLAB/Simulink and AMESim. The operating principles of the DREHB in normal and degraded initiative braking modes are introduced, especially for the consideration of fail-safe and fail-operational functions.

The DREHB is designed as a decoupled-architecture system containing three-layer cascaded modules, including a hydraulic power provider, a hydraulic flow switcher, and a hydraulic pressure modulator, and each of the modules can share dual redundancy. This paper presents a novel brake-by-wire system, DREHB (Double Redundant Electro-Hydraulic Brake), with extensible fail-safe operations for high-automation autonomous driving vehicles. The high redundant brake-by-wire system reveals vehicular safety handling ability and rarely emerges in the automotive area at the present time.