Dynamic monitoring method and system for braking performance of automobile wheel

Abstract

The invention discloses a dynamic monitoring method for a braking performance of an automobile wheel, and the method comprises the steps: sensing a tangential acceleration of the wheel through a single-axis accelerometer of a wheel sensing module; determining a braking start time by using an output signal of a wheel tangential acceleration sensor, and detecting a braking signal; using the wheel tangential acceleration sensor to output a signal, and processing the signal to obtain the rotation period, rotation frequency and angular speed of the wheel; calculating the braking distance, speed, braking initial speed and braking deceleration of a vehicle body through using the angular velocity parameter of the wheel; calculating the unequality of the brake deceleration balance of the left and right wheels through the braking deceleration parameter of the wheel. The system includes a wheel sensing module and an in-vehicle central control module.

Description

technical field [0001] The invention relates to the technical field of motor vehicle running safety performance detection, in particular to a method and system for dynamic monitoring of vehicle wheel braking performance. Background technique [0002] Motor vehicle operation safety performance detection is an important means to ensure the safe operation of motor vehicles. The dynamic detection technology of motor vehicle operation safety performance is used to detect the safety status and operation indicators of motor vehicle operation, timely discover and prevent motor vehicle failures, and ensure the safe operation of motor vehicles. It is of great significance; it is a major social public welfare technical work related to the safety of the country and people's lives and properties, it is an important technical support to ensure the safety of motor vehicles, and it is a very important technical guarantee for the safe operation of motor vehicles by government management depar...

AI Technical Summary

Problems solved by technology

The existing bench test method is relatively complicated to operate, has large errors, poor repeatability, poor adaptability to vehicles with different wheelbases, and occupies a large area. It is impossible to accurately obtain the braking performance of the four wheels during the driving process of the vehicle, especially the braking stability.

The existing road test method measures the braking performance parameters of the whole vehicle, which cannot obtain the braking performance parameters of the four wheels during the driving process of the vehicle, and cannot fully evaluate the braking performance of the motor vehicle

The existing braking performance detection method does not dynamically detect the braking performance of the four wheels during the driving process of the motor vehicle. The size and balance of the power cannot fully evaluate the braking performance of the motor vehicle, especially the braking stability, which is not conducive to the dangerous working conditions such as deviation, sideslip, and loss of steering during the operation of the motor vehicle. Prediction and assessment of direction instability

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