Design of Linear Calibration and Fault Monitoring Techniques for System Embedded Brake Pedal Travel Sensor

The Brake Pedal Travel Sensor (PTS) signal can be used as a trigger for braking control and to provide information on the amount of braking to the braking controller. If the linearity of the PTS signal is not ensured, the linearity of the braking control cannot be guaranteed. In addition, a low or high-state fault in the PTS measurement system may result in unintended, under, or over-braking. Therefore, the linearity of the PTS signal and fault monitoring techniques are critical for braking control. In this paper, we propose and validate techniques for PTS linearity calibration and fault monitoring. The test results show that the linearity of PTS signals has improved, and the proposed monitoring techniques can be expected to be applied to commercial products.