An Algorithm to Ascertain Driver Braking Intent and Fault with an Electronic Brake Pedal

Electronic braking system can improve the response time during braking and improve safety. However, brake-by-wire implementation poses a higher susceptibility to faults when compared to its mechanical counterpart. This study presents a mathematical model for a dual-sensor electronic brake pedal that relates the sensor output to the brake pedal displacement considering the noise in power source. Based on this model, an algorithm that ascertains the driver's intent and identifies any faults during real-time operation is developed. The algorithm was experimentally evaluated in a hardware setup with and without emulation of fault conditions. The algorithm was found to respond accurately to the input in normal and faulty conditions with the corresponding fault flag.