Today lean angle sensors can only calculate the angle of between the axis of gravity and the vehicle center line. There is no information about the angle of the road versus the horizontal line. On public roads this angle in combination with the corner radius can be neglected. For racing this could be of importance to find the limits. Tolerances of the calculated lean angle in relation to a high precision measuring tool are shown in table. Measuring range +/- 180° Angle failure relative +/- 1,5° Offset compensated Start up time < 500ms Phase shift to reference < 10ms Because the driver is a moving part on the total bike system, the axis of combined axis of gravity is not the same as the center line of the bike. Scheme is shown in figure 10. Advanced systems for motorcycles based on inertialsensors
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