A study of operational variable influencing wheel balancing measurements

1 online resource (102 pages) : PDF

2016

University of North Carolina at Charlotte

The aim of this research is to analyze various operational parameters that may affect the wheel balancing measurement. Therefore, wheel balancing measurements were taken iteratively on different low profile wheel/tire assemblies for different conditions to understand which operational conditions influence the measurements. These low profile tires include 205/50 ZR 17 89Y, 265/35 ZR 18 (97 Y), 225/40 ZR 18 (97Y), 265/35 R18 (97 Y), 265/35 R18 (97Y), 205/40 R17 84H, 255/40 ZR 17 94(Y). The measurements were taken on Hunters wheel balancing machine - DSP9200. Accuracy and repeatability of the existing machine was determined using statistical methods. Repeatability and accuracy of the measurements for one particular set of readings were confirmed by clocking (Dismounting tire from machine and rotating at certain degrees and re-mounting it) the tire 45 degrees after every two measurements. Based on the knowledge of wheel balancing operations, a mathematical equation was deduced and error analysis of this equation based on the dependent variables was performed. A custom adapter to mount the wheel on wheel balancer was designed to improve centering of the wheel on the spindle shaft to enhance the precision of the wheel balancer. High end cars such as Porsche or Mercedes are equipped with high-performance wheels. These high performance tires are rated for speed of 185 mph and above. A slight imbalance on the wheel assembly of these cars may considerably affect the vehicle ride. Hence the special adapter was designed for high performance tires of Porsche. Wheel balancing machine's repeatability was improved considerably after replacing the conventional wheel mounting cone spacer with the newly designed adapter. Finally, ways to improve the design of the wheel mounting adapter and a method for better calibration of the machine are discussed in the scope for future work.

masters theses

Mechanical engineering
Automobiles--Design and construction
Mathematics

M.S.

Centering
Dynamic Balance
Error Analysis
Imbalance
Vibration
Wheel Balancing

Mechanical Engineering

Tkacik, Peter

Uddin, Mesbah
Vermilion, Christopher

Thesis (M.S.)--University of North Carolina at Charlotte, 2016.

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Nabar_uncc_0694N_11093

http://hdl.handle.net/20.500.13093/etd:1196