Development of a Mechanism for Measuring Forces and Aligning Moment Acting on the Steering Wheels of a Four-Wheel Vehicle

In this paper، a low-cost dynamometer for rolling، steered wheels is described. The dynamometer was constructed to determine whether such an instrumented mechanism was practical. Four S-beam load cells، an Opto-counter and a potentiometer were used to obtain all moments، and forces using dynamic and kinematic analysis. Minimal simplifying assumptions considered for the required calculations. Overturning، aligning and rolling resistance moments besides vertical force are directly measured by the load cells. The Opto-counter detects wheel angular velocity and the potentiometer was used to measure the steering angle. The results showed that the mechanism was very well calibrated with a coefficient of determination of over 0. 99 and can be used to define wheel dynamic behavior.