A method detects systematic deviations during a determination of a movement variable of a ground-based, more particularly rail-based, vehicle. To optimize the operation of the vehicle, more particularly to minimize operational restrictions during operation of the vehicle, the method proposes that—based on a measurement value, assigned to a time, of at least one sensor, a value, assigned to the time, of the movement variable is determined and—subject to the value, assigned to the time, of the movement variable and a statistical sensor accuracy value, determined for this value, of the at least one sensor, a test variable value, assigned to the time, is formed and is compared in a comparison with a predefined test bound in order to make an assumption regarding an existence of a systematic deviation. The assumption is subject to a comparison result obtained from the comparison.

A method in a vehicle for estimating vehicle motion state during a vehicle maneuver, comprising; obtaining a trigger signal indicating an onset of the vehicle maneuver, selecting a sub-set of wheels on the vehicle to be in a free-rolling condition, measuring one or more parameters related to revolution of the sub-set of wheels in free-rolling condition, and estimating the vehicle motion state based on the measured parameters.

A tire radius monitoring system for dynamically determining a tire effective radius for each of the wheels on a vehicle is described. The system includes a GPS sensor, a plurality of wheel speed sensors, and a controller. The controller determines, via the GPS sensor, a velocity vector related to longitudinal velocity of the vehicle. The controller determines wheel speeds for the plurality of vehicle wheels, and detects a no-wheel-slip state for the vehicle wheels and the velocity vector from the GPS sensor. The controller determines tire effective radii for the plurality of vehicle wheels based upon the velocity vector for the vehicle and the wheel speeds for the plurality of vehicle wheels during the no-wheel-slip state, and controls vehicle operation based upon the tire effective radii.

An emergency braking system of a single-track vehicle configured to intervene in a braking process of the single-track vehicle includes a plurality of sensors that determine various physical variables. From the physical variables an accident risk actual value is determined, compared with an accident risk target value using an emergency braking system control unit, and if the accident risk actual value exceeds the accident risk target value, the single-track vehicle's brake is actuated by the emergency braking system control unit.

A method for compensating for a temperature drift of an accelerometer for measuring the lateral tilt of a motorbike. When the vehicle is in the “bike upright” condition, and the temperature of the accelerometer is at least 30° C. above its reference temperature, a reading is taken of the acceleration values. These values are then processed in order to identify the coefficient of the slope of the straight line for correcting the offset of each axis of the accelerometer. A processing operation involves verifying the strict monotony of the coefficients in at least two successive readings and ensuring that the mean value thereof is included between determined limits. The mean coefficient that is finally obtained then can be used to correct the temperature of accelerations read over the entire operating range of the accelerometer. Thus, the computation of the tilt angle of the motorbike is more precise.

An apparatus and method for controlling pressure of a braking system including a pressure sensor configured to detect a pressure value within the braking system mounted in a vehicle, and collect the detected pressure value as an analog pressure signal; and a control device configured to calibrate the analog pressure signal received from the pressure sensor, convert the calibrated analog pressure signal into a digital pressure signal, and output the digital pressure signal.

An apparatus and method for controlling pressure of a braking system including a pressure sensor configured to detect a pressure value within the braking system mounted in a vehicle, and collect the detected pressure value as an analog pressure signal; and a control device configured to calibrate the analog pressure signal received from the pressure sensor, convert the calibrated analog pressure signal into a digital pressure signal, and output the digital pressure signal.

A vehicle includes an inertial measurement unit (IMU); and a controller electrically connected to the IMU. The controller is configured to receive an output signal including at least one of an angular velocity and an acceleration from the IMU, to identify a driving state of the vehicle according to at least one of the output signal, a steering angle of the vehicle, a steering angular velocity of the vehicle, a number of gear stages of the vehicle, a wheel speed of the vehicle, and a braking pressure of the vehicle, to identify an offset and an offset reliability of the output signal according to the driving state of the vehicle, and to transmit a signal from which the offset is removed from the output signal according to the offset and the offset reliability.

A vehicle disturbance detection apparatus includes an electronic control unit. The electronic control unit determines whether a disturbance occurs in a vehicle based on detection signals from a sensor device. The disturbance is a lateral external force that causes the vehicle to veer in a direction different from a direction expected by a driver. The electronic control unit determines that the disturbance occurs in the vehicle when a disturbance determination condition is established in a relationship between a calculated yaw rate and an actual yaw rate. The disturbance determination condition includes a cant traveling exclusion condition that is not established when the vehicle veers by traveling along a cant road but is established when the vehicle veers by receiving a crosswind.

A computer-implemented method is provided for tire state estimation using a physics-based model rather than empirical models. During a calibration process, data is collected in data storage as correlating a first set of tire acceleration values for a given tire model to respective known values for each of a plurality of tire state variables. A physics-based tire model is generated corresponding to the given tire model and comprising one or more tire model parameters determined upon calibration and which remain constant under different conditions. During operation of the tire, measurements are collected for a second set of tire acceleration values and certain of the tire state variables (e.g., speed and inflation) via one or more tire-mounted sensors. At least one of the unmeasured tire state variables (e.g., load and/or tread depth) is estimated based on the second set of tire acceleration values and using the physics-based tire model.