3.2. Speed experiments
The results of these tests on the mountain bike are listed in Table 3. The tire pressure was 2 bar in
both front and rear tire. The relation between the speed and accelerations (in RMS) seems to be quite
linear. These results underline the necessity to keep the speed as constant as possible in the other tests,
since the speed has a large influence on the level of vibration.
When the fork is unlocked the acceleration on the front wheel are a lot larger. This was also expected
since the front wheel can move more freely when the fork is not locked. The vibrations for the rear wheel
did not change significantly.
Table 3. RMS values of the accelerations in the time domain for the different speeds and the fork locked and unlocked
Speed (km/h): Fork suspension: Front wheel (m/s
2
): Rear wheel (m/s
2
):