Research on Calibration Theories and Experiments of Vehicle Wheelbase Difference

Considering the disability of calibration theories and methods for the tester of automobile wheelbase difference, mechanical analysis of the vehicle stability is employed to dedicate the negative influences of wheelbase difference. A novel device can realize calibration of the wheelbase difference within the range of 0-40 mm by variable wheelbase mechanism is proposed. Two diagnosis systems which suit the situations that the vehicle is driven in a straight line or a curve are presented. Calibration results of the tester show that maximal detection error of the measured points reaches 0.57 mm which is more than ±0.2 mm in the calibration standard. Experiments prove that the calibration methods proposed can verify the results of wheelbase difference tester fast and accurately.