摘要:
When detecting a maladjusted brake component on a commercial vehicle, wheel end temperature is determined as a function of resistance measured by a wheel speed sensor at a wheel end. The measured temperature is compared to low and high temperature thresholds defined by a thermal model, as well as to one or more other wheel speed sensor temperatures. If the measured temperature is below the low temperature threshold and substantially different than the one or more other wheel speed sensors, the brake is determined to be under-adjusted and brake force at the under-adjusted brake is increased. If the measured temperature is above the high temperature threshold and substantially different than the one or more other wheel speed sensors, then the brake is determined to be over-adjusted, and brake force is reduced or modulated at the over-adjusted brake to prevent overheating.
摘要:
A method for operating an electronic brake system in a vehicle having at least two tires on an axle, wherein the vehicle has a center of gravity (SP) with a height (hSP), is disclosed. According to the method, the height (hSP) of the center of gravity (SP) is calculated and used as a parameter by the electronic brake system. An electronic control unit, an electronic brake system, and a vehicle including the same for carrying out the method are also disclosed.
摘要:
One embodiment provides a vehicle brake hydraulic controller including a wheel speed acquiring section; a wheel deceleration calculator; a vehicle velocity calculator; and a locking tendency determination section. The vehicle velocity calculator calculates a vehicle deceleration based on a temporary vehicle deceleration corresponding to an acceleration sensor value and calculates a vehicle velocity based on the calculated vehicle deceleration. The vehicle velocity calculator calculates the temporary vehicle deceleration by offsetting a first correction amount to a deceleration side in relation to the acceleration sensor value. When a brake pedal operation amount by a driver is equal to or smaller than a first threshold and that an absolute value of the wheel deceleration is equal to or larger than an absolute value of a second threshold are met, the first correction amount is set to be smaller than when the conditions are not met.
摘要:
The present invention provides an improved method and system for compensation of inertial sensors. In one implementation a modified moving average is applied to provide dynamic offset compensation for an inertial sensor output that is calculated when a vehicle is in motion.
摘要:
A method for compensating inertial sensor measurement outputs for mounting locations that are not coincident, nor orthogonal, with the vehicle center of gravity. The method further utilizes vehicle angular rate measurements, data, or estimates to determine the discrete acceleration components of the composite inertial sensor measurement output.
摘要:
In a method for determining a steering angle for a vehicle, a steering angle is determined using a single-track model of the vehicle, wherein the steering angle is corrected only if the difference between the derivative of a measured steering lock angle and the derivative of a calculated steering lock angle is below a threshold value. Otherwise the measurement is repeated.
摘要:
Method and control device for determining a steering angle of a motor vehicle, wherein a theoretical steering angle is calculated by a vehicle model and a measured steering angle is determined with a steering angle sensor, and the difference between the measured and theoretical steering angles is determined, wherein at least one data record including a number of successive measured values is acquired, and a correction constant for the measured steering angle is determined from the mean value of the differences between the theoretical steering angle and the measured steering angle. According to the invention, a confidence level, which changes incrementally between successive data records, is calculated by travel conditions present during the acquisition of the data record and/or an analysis of the data record.
摘要:
According to an aspect of the present invention, there is provided an abnormality judgment device including: a change amount calculator configured to calculate a change amount between currently-obtained and previously-obtained steering angles; a storage section configured to store a threshold value; a reference setting section configured to set a reference steering angle; an incrementing section configured to continue gradually incrementing the threshold value after the change amount exceeds the threshold value, for a judgment time; a deviation comparator configured to compare an absolute deviation between the currently-obtained steering angle and the reference steering angle with the threshold value, and to count a counter when the absolute deviation exceeds the threshold value; and a judgment section configured to judge that the steering angle sensor is abnormal when the counter reaches a predetermined value.
摘要:
An acceleration/deceleration detecting system includes an acceleration/deceleration detector configured to be disposed in a measurement object and detect acceleration/deceleration of the measurement object, an acceleration/deceleration device configured to accelerate or decelerate the measurement object, and a calculation device configured to determine that a detection value of the acceleration/deceleration detector is an offset error or a detection error of the acceleration/deceleration detector, when an actual acceleration/deceleration direction of the measurement object is different from an acceleration/deceleration direction shown by a detection value of the acceleration/deceleration detector in a state that the measurement object is accelerated or decelerated by the acceleration/deceleration device.
摘要:
A velocity measuring device and a measured velocity correcting method are provided. The velocity measuring device includes: a GPS unit that receives a satellite signal from a GPS (Global Positioning System) satellite and generates GPS data including position coordinates and a traveling velocity; an acceleration sensor unit that includes an acceleration sensor and generates sensor data including a traveling velocity and a road slope; and a correction unit that compares the GPS data and the sensor data generated at a current time with the GPS data and the sensor data generated at a previous time and sets the traveling velocity included in the sensor data or the GPS data as a measured velocity depending on whether a variation in traveling velocity exists.