Errors of car wheels rotation rate measurement using roller follower on test benches

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Potapov, A.S.^1 ; Svirbutovich, O.A.^1 ; Krivtsov, S.N.^1

Irkutsk National Research Technical University, Lermontov Av. 83, Irkutsk

664074, Russia^1

关键词: Accuracy of measurements;    Degree of accuracy;    Measurement accuracy;    Measurement system;    Mode identification;    Operating condition;    Performance monitoring;    Rotation frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/4/042086/pdf
DOI  :  10.1088/1757-899X/327/4/042086

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The article deals with rotation rate measurement errors, which depend on the motor vehicle rate, on the roller, test benches. Monitoring of the vehicle performance under operating conditions is performed on roller test benches. Roller test benches are not flawless. They have some drawbacks affecting the accuracy of vehicle performance monitoring. Increase in basic velocity of the vehicle requires increase in accuracy of wheel rotation rate monitoring. It determines the degree of accuracy of mode identification for a wheel of the tested vehicle. To ensure measurement accuracy for rotation velocity of rollers is not an issue. The problem arises when measuring rotation velocity of a car wheel. The higher the rotation velocity of the wheel is, the lower the accuracy of measurement is. At present, wheel rotation frequency monitoring on roller test benches is carried out by following-up systems. Their sensors are rollers following wheel rotation. The rollers of the system are not kinematically linked to supporting rollers of the test bench. The roller follower is forced against the wheels of the tested vehicle by means of a spring-lever mechanism. Experience of the test bench equipment operation has shown that measurement accuracy is satisfactory at small rates of vehicles diagnosed on roller test benches. With a rising diagnostics rate, rotation velocity measurement errors occur in both braking and pulling modes because a roller spins about a tire tread. The paper shows oscillograms of changes in wheel rotation velocity and rotation velocity measurement system's signals when testing a vehicle on roller test benches at specified rates.